Electric Procedure-NFPA 70E

Phosphate Business Unit Program The Mosaic Company

Environmental, Health and Safety (EHS) Department 3033 Campus Drive, Suite E490

Plymouth, MN 55441

Electric Procedure-NFPA 70E

Location/Applicability: Phosphate Business Unit Document Identifier: 693470

Document Owner: Director EHS Services - Phosphate Business Unit

Effective Date: November 1, 2012 Review Due Date: November 1, 2015

EHSS-Phos Reference - Electrical NFPA 70E Guidelines.docx

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TABLE OF CONTENTS

1. Purpose 1

2. References 1

3. Responsibilities 2

4. Written Program 4

5. Definition of Terms 5

6. General Procedures 9

7. Training & Qualifications 15

8. Contractors 18

9. Audits and Reports 18

10. Miscellaneous Requirements 19

11. Approval: 23

12. Revision log 23

1. PURPOSE

The Mosaic Company’s electrical safety policy and related procedures is to ensure safe work practices for employees and contractors working on or near electrical hazards, including electrical shock, arc flash and blast hazards associated with energized electrical work. In addition to this policy and procedures, the Mosaic Company will ensure compliance with all applicable National, State and Local codes, standards and procedures. The risks of injury to personnel involved in the operation and maintenance of facilities is considerable when unsafe acts involving energy from electrical power systems are performed.

2. REFERENCES

The requirements contained in this document are based on:

• NFPA 70E: Standards for Electrical Safety in the Workplace, 2009 Edition.



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• OSHA 29CFR 1910.137, 147, and 303-399

• ANSI/ISA-61010-1 (82.02.01)-2004 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 1: General Requirements

• ASTM F855 - 09 Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment

• MSHA 30 CFR Part 46 Training Requirements for Surface Non-Metal Mines

• IEEE Standard 1584-2002 Guide to Performing Arc Flash Hazard Calculation

3. RESPONSIBILITIES

3.1 Mosaic Engineering – Electrical Safety Administrator(s)

3.1.1 Responsible to maintain and update the Mosaic Safe Electrical Work Policy and Procedures Program

3.1.2 Measures and evaluates the effectiveness of the Safe Electrical Work Policy and Procedures Program

3.1.3 Provide assistance as needed for approving the selection and use of Electrical Safety equipment and clothing

3.1.4 Assists in identifying the level of Risk Management applied to specific live electrical hazards

3.1.5 Evaluate Mosaic standards to consider using new technology aimed

at minimizing energy levels and employee exposures to electrical

hazards such as:

• Arc Flash MCC’s, MVC;s and Switchgears

• High resistance grounding

• current limiting devices and relay upgrades

• Use of transformers of less than 125 KVA in size

3.2 Management Responsibilities

3.2.1 Ensure that all employees under their cognizance are provided a workplace that is free from recognized hazards.



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3.2.2 Ensure that employees under their cognizance performing electrical work are trained and qualified (See Training & Qualifications section).

3.2.3 Ensure that personal protective equipment (PPE) and clothing are provided to the employees.

3.2.4 Keep and maintain records in accordance with Mosaic records retention policies.

3.3 Mosaic Electrical Supervision

3.3.1 Responsible for assuring the Mosaic’s Safe Electrical Work Policy and Procedures are implemented and followed by employees and contractors. 3.3.2 Responsible for the development and implementation of site-specific Safe Electrical Work Policy and Procedures. 3.3.3 Approves the selection and use of Electrical Safety Work equipment and clothing. 3.3.4 Prepare and approves the risk assessment for Energized Electrical Work hazards. 3.3.5 Knowledgeable on applicable Electrical Safety regulations, codes and requirements. 3.3.6 Assists Program Administrator as required.

3.4 Facility E & I Department

3.4.1 Qualified Electrical Persons:

3.4.1.1 Verifies that clothing and electrical safety equipment for specific tasks are adequate for the abatement of the live electrical hazard. 3.4.1.2. Uses appropriate Electrical Safety equipment and clothing for specific tasks. 3.4.1.3 Assists in the preparation of the risk assessment for Energized Electrical Work hazards.



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3.4.1.4 Responsible for adhering to all requirements of Mosaic’s Safe Electrical Work Policy and Procedures. 3.4.1.5 Knowledgeable on applicable Electrical Safety regulations, codes and requirements. 3.4.1.5 Responsible to cease work and take appropriate action to include communicating to the appropriate management level when new or previously unknown hazards are identified.

3.4.2 Non-Qualified Electrical Persons:

3.4.2.1 Responsible for ensuring in becoming familiar with this Mosaic’s Electrical Safety Policy and Procedures 3.4.2.2 Comply with the policies and procedures contained herein 3.4.2.3 Accomplish each tasks in accordance with Mosaic’s Electrical Safety Policy and Procedures 3.4.2.4 Report any safety discrepancy or unsafe condition promptly to Immediate supervisor.

3.4.3 Contractors

3.5.1 In addition to complying with Mosaic Electrical Safety Policy and related procedures, contractors will ensure compliance with all applicable National, State, Local and Country regulations. 3.5.2 Provide all required personal protective equipment for their employees and proper training for use of the special precautionary techniques, personal protective equipment (PPE), including arc-flash, insulating and shielding materials, insulated tools and test equipment. 3.5.3 Submit site specific live electrical work plans for review by the person(s) having authorized oversight (i.e. contractor control manager, Mosaic Lead Electrical person, etc.)

4. WRITTEN PROGRAM

Mosaic Safe Electrical Work Policy and Procedures Administrator will review and evaluate this document:



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• When changes occur to related regulations that prompt a revision

• When operational changes occur that require a revision to this document.

5. DEFINITION OF TERMS

Ampacity – The current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature. Attachment plug – A device that, by insertion into a receptacle, establishes a connection between conductors of the flexible cord and the conductors connected permanently to the receptacles. Bonding – The permanent joining of metallic parts to form an electrically conductive path that will assure electrical continuity and the capacity to conduct safely any current likely to be imposed. Branch circuit – Circuit conductors between the final over-current device protecting the circuit and the outlet(s). Cabinet – An enclosure designed either for surface or flush mounting and is provided with a frame, mat or trim in which a swinging door or doors are or may be hung. Circuit breaker (600 volts nominal or less) – A device designed to open and close a circuit by non-automatic means and to open the circuit automatically on a predetermined over-current without injury to itself when properly applied within its rating. Circuit breaker (Over 600 volts, nominal) – A switching device capable of making, carrying and breaking currents under normal circuit conditions, and also making, carrying for a specified time and breaking currents under specified abnormal circuit conditions such as a short circuit. Class One locations – Locations in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. Class Two Locations – Locations that are hazardous because of the presence of combustible dust. Class Three locations – Locations that are hazardous because of the presence of the easily ignitable fibers or flyings, but in which such fibers or flyings are not likely to be in suspension in the air in quantities sufficient to produce ignitable mixtures.



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Conductor, Bare – A conductor having no covering or electrical insulation whatsoever. Conductor, Covered – A conductor encased within material of composition or thickness that is not recognized as electrical insulation. Conductor, Insulated – A conductor encased within a material of composition and thickness that is recognized as electrical insulation. Cutout (over 600 volts, nominal) – An assembly of a fuse support with a fuse holder, fuse carrier or a disconnecting blade(s). The fuse holder or fuse carrier may include a conducting element (fuse link) or may act as the disconnecting blade by the inclusion of a non-fusible member. Dead front – Without live parts exposed to a person on the operating side of the equipment. Disconnecting means – A device, or group of devices or other means by which the conductors of a circuit can be disconnected from their source of supply. Enclosed - Surrounded by a case, housing, fence or walls that will prevent persons from accidentally contacting energized parts. Equipment – A general term including material, fittings, devices, appliances, fixtures, apparatus and the like, used as a part of, or in connection with an electrical installation. Explosion proof – Apparatus enclosed in a case that is capable of:

• Withstanding an explosion of a specified gas or vapor that may occur within

• Preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes or explosion of the gas or vapor within

• Operating at such an external temperature that it will not ignite a surrounding flammable atmosphere

Feeder – are circuit conductors between the service equipment or the generator switchboard of an isolated plant and the final branch circuit over current device. Fuse (over 600 volts, nominal) – An overcurrent protective device with a circuit opening fusible part that is heated and severed by the passage of overcurrent through it.



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Ground – A conducting connection, intentional or accidental, between an electrical circuit or equipment and the earth or to some conducting body that serves in place of the earth. Grounded – Connected to earth or to some conducting body that serves in place of the earth. Grounded, effectively (over 600 volts nominal) – Permanently connected to earth through a ground connection of sufficiently low impedance and having sufficient ampacity that ground fault current which may occur cannot build up to voltages dangerous to personnel. Grounded conductor – A system or circuit conductor that is intentionally grounded. Grounding conductor – A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes. Ground Fault Circuit Interrupter (GFCI) – A device for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit. Guarded – Covered, shielded, fenced or otherwise protected by means of a suitable cover. Interrupter switch (over 600 volts, nominal) – A switch capable of making, carrying and interrupting specified currents. Isolated – Not readily accessible to persons unless special means for access are used. Labeled – Equipment or materials to which has been attached a label, symbol or other identifying mark of a qualified testing laboratory that indicates compliance with appropriate standards or performance in a specified manner. Location:

• Damp – Partially protected locations under canopies, marquees, roofed open porches and like locations and interior locations subject to moderate degrees of moisture, such as some basements.

• Dry – A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction.



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• Wet – Installations underground or in concrete slabs or masonry in direct contact with earth and location subject to saturation with water or other liquids, such as locations exposed to weather and unprotected.

Motor Control Center (MCC) – An assembly of one or more enclosed sections having a common power bus and principally containing motor control units. Outlet – A point on the wiring system at which current is taken to supply utilization equipment. Overload – The operation of equipment in excess of normal, full-load rating or of a conductor in excess of rated ampacity when it persists for a sufficient length of time, will cause damage or dangerous overheating. Panel board – A single panel or group of panel units designed for assembly in the form of a single pane including buses, automatic over-current devices and with or without switches for the control of light, heat or power circuits designed to be placed in a cabinet or cutout box placed in or against a wall or partition and accessible only from the front. Qualified Person – One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received the safety training and been designated qualified in accordance with this instruction. Receptacle – A contact device installed at the outlet for the connection of a single attachment plug. A single receptacle is a single contact device with no other contact device on the same yoke. A multiple receptacle is a single device containing two or more receptacles. Service – The conductors and equipment for delivering energy from the electricity supply system to the wiring system of the premises served. Switch (general use) – A switch intended for the use in general distribution/ branch circuits. It is rated in amperes and is capable of interrupting its rated current at its rated volts. Switch, General snap – A general-use switch so constructed that it can be installed in flush-device boxes or on outlet box covers. Switch, Isolating – A switch intended for isolating an electric circuit from the source of power. It has no interrupting rating and is intended to be operated only after the circuit has been opened by some other means.



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Switch, Motor circuit – A switch rated in horsepower capable of interrupting the maximum operating overload current of a motor of the same horsepower rating as the switch at the rated voltage. Voltage (of a circuit) – The greatest root mean-square (effective) difference of potential between any two conductors of the circuit concerned. Watertight – So constructed that moisture will not enter the enclosure. Weatherproof – So constructed or protected that exposure to the weather will not interfere with successful operation. Rainproof, rain tight or watertight equipment can fulfill the requirements for weather proof where varying weather conditions other than wetness, such as snow, ice, dust or temperature extremes, are not a factor.

6. GENERAL PROCEDURES

Posted warnings: Employees shall read and comply with all posted warning signs and instructions. All electrical circuits shall be treated as energized until they have been locked out, tagged out and verified de-energized with safety grounds applied as applicable (LOTO). All electrical conductors and equipment shall be listed or labelled by a Nationally Recognized Testing Laboratory (NRTL). All installation, operations, maintenance and repair of any equipment should be in accordance with the manufacturer’s literature and the instructions included in the listing or labeling. The instructions contained in this document are designed to supplement the manufacturer’s literature, industry standards, experience and knowledge. The instructions contained are not designed to be used by inexperienced personnel or address all possible situations, conditions or hazards. Conductors and equipment shall be protected from over-current in accordance with their ability to safely conduct current. After a circuit is de-energized by a circuit protective device, the circuit shall not be manually re-energized until it has been determined that the equipment and circuit can be safely energized. The repetitive manual reclosing of circuit breakers or re-energizing circuits through replaced fuses is prohibited.



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Cables and wires shall be spliced or joined with splicing devices suitable for intended use. No wiring system of any kind shall be installed in ducts used to transport dust, loose stock or flammable vapors. All splices, joints and free ends of a wire or cable shall be insulated. Sufficient workspace shall be provided and maintained around electrical equipment to permit safe operation and maintenance of equipment. Energized equipment shall be guarded. Ground wires must be identified and distinguishable from all other wires in accordance with the National Electrical Code. Electrical control panels with open wires shall be guarded to make them accessible only to qualified persons. In addition to guarding, warning and high voltage signs shall be posted when unqualified personnel could come into contact with live parts. The area surrounding work areas will be free of conductive equipment, parts or debris. Circuits shall be identified as to their use. Each service, feeder and branch circuit, at its disconnecting means or over-current device, shall be legibly and durably marked to indicate its purpose unless located and arranged so the purpose is evident. Each disconnect switch or over-current device required for a service, feeder or branch circuit must be clearly labeled to indicate the circuit’s function, and the label or marking should be located at the point where the circuit originates.

6.1 Inspection and Evaluation of Electrical Equipment

All electrical equipment and cords shall be inspected prior to each use. The inspection shall include but is not limited to the following:

• Portable equipment shall be handled in a manner that will not cause damage. Flexible electric cord connected to equipment shall not be used for raising or lowering equipment. Flexible cords shall not be fastened with staples or hung in such a fashion as could damage the outer jacket or insulation.

• Physical integrity of enclosures and cabling insulation.



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• Insulation of portable test equipment and tool cords and casings.

• Test instruments and equipment and their accessories shall be rated for the circuits and equipment to which they will be connected and shall be suitable for the environment in which they will be used.

• The voltage detecting device should be selected on the basis of the service. The rating of the device must be at least as great as the expected voltage. Refer to Appendix A for the rating of test equipment.

• Any material not meeting the above criteria shall be immediately reported to the employee’s supervisor and removed from service until repairs are made.

Energized parts of electrical equipment operating at 50 volts or more shall be guarded against accidental contact by approved cabinets or other forms of approved enclosures, or by any of the following means:

• By suitable, permanent, substantial partitions or screens so arranged that only qualified persons would have access to the space within reach of the energized parts. Any openings in such partitions or screens shall be so sized and located that persons are not likely to come into accidental contact with the energized parts or to bring conducting objects into contact with them.

• By elevation of eight feet or more above the floor or other working surface. Note: Although equipment elevated at least eight feet is considered to be guarded, this may not be adequate if material being handled is likely to make contact with energized parts.

Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous warning signs forbidding unqualified persons to enter.

In addition to the above requirements Mosaic shall conduct, or cause to be conducted, and document an annual physical integrity inspection of all permanently installed electrical enclosures. Criteria and checklists used for this inspection shall be derived from NFPA 70E Article 400.

Additionally, all maintenance employees shall conduct a physical integrity and grounding-system visual inspection anytime a piece of equipment is opened for servicing.

6.2 Job Planning, Briefing and Documentation



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Supervisors of worker who are assigned a work task involving potential exposure to an electrical hazard must discuss with the employees involved all hazards associated with the task. A job briefing is another name for discussion of work. The briefing must be held prior to beginning each work task that is associated with work on or near exposed, energized electrical conductors or circuit parts. The briefing must include a discussion of electrical hazards and how employees might be exposed to them. At a minimum, the discussion should include the following subject:

• electrical hazards associated with the work task

• procedures that must be followed when executing the work task

• any special precautions that are required by the working conditions

• where and how to remove the source of energy

• emergency response and emergency communications

• required PPE

• other work in the immediate physical area

• other work associated with the same electrical circuits or equipment

The job plan, if deemed applicable, shall contain the following minimum elements: (Refer to Appendix B for a Sample Form of the Job Briefing)

• Purpose of task

• Qualifications and number of employees to be involved

• Hazardous nature and extent of task

• Limits of approach

• Safe work practices to be utilized

• Personal protective equipment involved

• Insulating materials and electrically rated tools involved

• Special precautionary techniques

• Electrical diagrams, equipment details, sketches/pictures of unique features and any reference data to be used

A Safe Work Permit may be used as substitute for the above.

6.3 Personnel Precautions for Performing Energized Work

No personnel shall perform energized work when alertness may be impaired due to illness, fatigue or other reasons.

Personnel shall not reach blindly into energized areas.

Personnel shall not perform energized work where the view is obstructed or adequate illumination does not exist.

Personnel shall verify that they are not wearing conductive articles, clothing or jewelry prior to working on energized electrical equipment.



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Personnel shall wear category 2 PPE minimum when performing energized work.

Refer to the equipment arc flash hazard label or Appendix D for proper PPE

requirements.

Personnel shall not bring any non-electrically rated tools or equipment into the

work area (this includes ladders and stools).

If work to be accomplished is within limited approach boundaries of potentials in excess of 600 volts, or the work is deemed particularly hazardous, a safety observer shall be assigned. The safety observer shall monitor the area for unsafe conditions, provide warnings when these conditions exist and shall be briefed on equipment cutouts and electrical emergency procedures. The safety observer will be qualified in CPR and have no other duties.

6.4 Energized Work

All energized electrical work at the facility shall be planned, and first-time procedures shall be documented and retained by the manager/supervisor responsible for the work for future reference. Only “qualified persons” shall be permitted to work on electrical conductors or circuit parts that have not been put into an electrically safe work condition. Hazard analysis for job planning shall be conducted using the guidance contained in this document and the Management process. Work shall be performed by written permit only.

Only when it can be demonstrated that de-energizing the equipment will introduce additional or increased hazards, or is infeasible due to equipment design or operational limitations, will energized work be authorized by the worker’s Supervisor or Manager or their designated representatives, (e.g. quantitative or qualitative electrical diagnostic measurements or routine adjustments).

Normally all live parts (> 50 volts) which an employee may come into contact with shall be put into an electrically safe condition utilizing the Lockout/Tagout (LOTO) procedure.

Personnel shall not make cable connections to energized components’ connections unless connectors are specifically listed for that purpose and approved by Mosaic Electrical Supervision or Engineer.

All electrical conductors shall be considered live until placed in an electrically safe condition and verified via the LOTO procedure.



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No bare-hand work is ever to be conducted on exposed energized electrical conductors or circuit parts above 50 volts to ground.

Performing checks to verify that equipment is de-energized shall be considered Energized Work for the purpose of this instruction.

Authorization for Energized Work shall be obtained utilizing the Energized Electrical Work Permit in Appendix F.

Routine testing, voltage measurements (0-600V) and troubleshooting by qualified employees may be conducted without the use of an energized work permit as long as the safe work procedures and required PPE of this document are utilized. Removing bolted covers from energized equipment or the insertion or removal of circuit breakers or motor control units from energized cubicles shall never be considered routine work.

Examples of work not requiring an energized work permit:

• Opening a hinged cover on an enclosure to perform a visual or IR inspection.

• Performing voltage measurements to verify a zero-energy state.

• Connecting an I/O device to a PLC or variable frequency drive.

• Other frequently performed tasks which local site management has approved. Troubleshooting/Testing: using standard testing instruments on energized circuits less than 600V to determine voltage, amperage, wattage, testing, etc.

• Use of test equipment: e.g., 1KV/5KV Meggers, High Potential (Hi-Pot) test sets, thermal or ultrasonic imaging cameras and sensing equipment.

• Removing Fuses with an approved fuse puller and/or appropriate voltage rated gloves de-energizing (completing LOTO procedures) the circuit.

• General repairs: Repair of electrical equipment like lighting (illumination) and control relays.

Elements of Work Permit - refer to the Appendix F for a Sample Work Permit Form. When the energized work permit is created, the elements of the permit should be considered and the permit should provide evidence of their consideration.

6.5 Precautions When Electrical Arcing and Flashes May Occur

Employees must wear protective equipment for the eyes or face wherever there is a potential danger of electric arcs, flashes or from flying materials resulting from an arc blast. The following scenarios are examples of situations with the potential for arcs:

• Switching of 208-volt phase-to-phase or higher circuits.



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• Installation or removal of low voltage circuit breakers in 208-volt phase-to-phase or higher energized circuits.

• Installation or removal of low-voltage motor starters with an energized bus in 208-volt phase-to-phase or higher circuits.

• Any energized electrical work task that could initiate a short circuit condition.

PPE for the prevention of arc-flash injuries shall be selected based on the incident energy involved and shall be in accordance with the Arc Flash Warning Labels. NOTE: For Facilities or equipment that have not had an Arc Flash Hazard Study completed yet. Use the Tables in Appendix D to select the appropriate PPE.

A work area shall be established and marked around the energized work at either the limited approach or the flash hazard boundary, whichever distance is greater. Both Arc Flash Protection and Shock Boundaries distances will be based on the equipment Arc Flash Hazard Warning Labels.

NOTE: For equipment or facilities that do not have the Arc Flash Hazard Study completed yet, Use Appendix E to determine the appropriate distances.

Qualified Persons - When a qualified person is working in the vicinity of exposed energized parts, they may not approach or take any conductive object without an approved insulating handle closer to exposed energized parts than shown in Table 2 unless:

• The person is insulated from the energized part (gloves with sleeves, if necessary, rated for the voltage involved, are considered to be insulation of the person from the energized part on which work is performed.)

• The energized part is insulated from all other conductive objects at a different potential and from the person.

• The person is insulated from all conductive objects at a potential different from that of the energized part.

• The person has justified the reason for the work and has a plan based on risk analysis.

7. TRAINING & QUALIFICATIONS



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All Employees All employees shall be trained in safety-related work practices and procedural requirements as necessary to provide protection from the electrical hazards associated with their respective job or task assignments. Employees shall be trained to identify and understand the relationship between electrical hazards and possible injury.

Qualified Employees In order for an Electrical and Instrumentation Department employee to be considered qualified, he / she shall have been an employee of Mosaic for at least six weeks, received training and have demonstrated to his/her Supervisor or Manager the requisite knowledge and skill to work safely around energized conductors. A worker may be considered “qualified” by his/her Manager/ Supervisor with respect to certain equipment and methods still unqualified for others. As a minimum the training will include the following topics:

• Distinguishing exposed energized electrical conductors and circuit parts from other parts of electrical equipment.

• Determination of nominal voltages of exposed energized electrical conductors and circuit parts.

• Determination and understanding the significance of approach distances.

• Hazard identification, mitigation and shall possess/demonstrate the skill on the proper selection, use, inspection and care of required PPE.

• Proper inspection and use of portable test equipment including calibration and grounding.

• Safely de-energizing of parts and subsequent electrical lockout and tagging procedures as required by the LOTO policy.

• Proper precautionary work techniques.

• Proper use of personal protective equipment to include arc flash clothing, non-conductive gloves, aprons, head protection, safety glasses and face shields.

• Aware of the importance of inspecting Personal Protective Equipment (PPE), including FR Apparel before each use and reporting any damage to the company providing cleaning and repair services to the facility.



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• Proper selection and use of rated test instruments and equipment including the capability to visually inspect all parts of the test equipment for defects.

• Use of insulating and shielding materials for employee protection to include auxiliary shields, guards, mats or other specific equipment.

• Proper use of insulated tools or other non-conductive devices such as fuse pullers, fish tapes, hot sticks, ropes or handlines.

• The importance of illumination and to work only in properly illuminated areas.

• Proper work techniques for work in enclosed or confined workspaces.

• Removal or special handling of any conductive materials and equipment.

• Proper and safe use of portable ladders around electrical equipment.

• Removal of any conductive apparel or jewelry.

• Proper alerting techniques such as safety signs and tags, barricades, attendants and work practices.

• Any other safety-related work practice not listed above but is necessary for them to safely do their job.

• The Safety Officer/Supervisor/Manager shall maintain a list of qualified employees in their areas and shall conduct and document semi-annual reviews of the training and safety performance of these personnel.

Retraining

Mosaic will provide retraining program for all qualified personnel as required to stay current on skill proficiencies as required by this policy.

An employee shall receive additional training (or retraining) under any of the following conditions:

• The supervision or annual reviews indicate that the employee is not complying with the safety-related work practices.

• New technology, new types of equipment or changes in procedures necessitate the use of safety-related work practices that are different from those that the worker would normally use.



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• The worker must employ safety-related work practices that are not normally used during his/her regular job duties.

Training Documentation The Mosaic HR and EHS Departments shall be provided with all training documents. This documentation shall be made when the employee demonstrates proficiency in the work practices involved and shall be maintained for the duration of the employee’s employment. The documentation shall contain each employees name and dates of training.

• Energized Electrical Work Approvals (Briefings, Permits, Switching Tag, Specific Procedures) shall be maintained by the supervisor of the person(s) performing the work for at least three years.

• Energized Electrical Work Approvals shall be made available to EH&S personnel

• Training records shall be kept on file for a period in accordance with Mosaic records retention policies.

• Qualification determination records including resumes, job applications, military training records, on-the-job training records, etc., shall be kept on file for a period in accordance with Mosaic records retention policies.

8. CONTRACTORS

Outside contractors that will be performing work on Mosaic Property shall follow ALL applicable codes and standards, Mosaic Electrical Safety Policy and MSHA 30 CFR Part 46 Training Requirements for Surface Non-Metal Mines and be pre-qualified to perform electrical work. Mosaic Electrical & Instrumentation Supervisor and the contracting firm must inform each other of their respective electrical safety procedures. The responsibility of training outside contractor’s employees lies with their employer. All Contractors shall be trained by the Contractor Safety Officer in Mosaic Electrical Safety policy including the required on-site safety training and have been pre-qualified prior to conducting any work on Mosaic property associated with electrical equipment.

9. AUDITS AND REPORTS



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• An annual audit of the principles contained in this document shall be conducted by each Facility Electrical Supervision and the Electrical Safety Officer or a firm designated by them. The results of the audit shall be forwarded to Mosaic Management. Any deficiencies identified as a part of annual or periodic field audit shall be reported to Mosaic’s electrical safety program administrator, Safety superintendent and appropriate management level for review and documented so that deficiencies may be tracked and integrated in Mosaic Electrical Safety Policy.

• Results of the audit shall include an overall assessment of facility and program compliance, as well as specific deficiencies noted and proposed corrective actions and follow-ups to be conducted. • The audit must determine if workers are implementing the requirements of this

policy. • The audit must determine if the policy addresses all hazards that might exist in

the work site. It must determine if workers are or might be subject to risk or injury not covered by this policy.

• The audit must define how any revision of specific procedures or a general change is communicated to the workers. Each Department Supervisor shall conduct training with all employees under their cognizance on discrepancies found and lessons learned from the audit.

The Mosaic electrical team, including the Program Administrator. Electrical engineering and superintendents shall conduct an annual evaluation of all country, federal, state, and local programs that may be impacted by changes in regulations governing electrical work activities and practices (e.g., revisions to NFPA 70E, the NEC, OSHA, MSHA electrical regulations, standards, etc)

10. MISCELLANEOUS REQUIREMENTS

10.1 Work in Hazardous Locations Energized electrical work in a Class I, Class II or [Class III] Division 1 or 2 locations require special hazard precautions. Work shall only be performed after



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a thorough analysis has been made to verify that work can be performed safely and that approval has been obtained from the responsible manager. A thorough test of the area must be performed with a properly calibrated (to the type of vapor that might be present) combustible gas indicator and continuously during any energized electrical work. If any indication of a vapor in the air is sensed on the combustible gas indicator, work will not proceed or will stop until the source of the vapor is controlled or entirely eliminated. In all cases, work shall be performed in a de-energized and locked-out condition to prevent an electric spark potential in such an area. Energized electrical work in a hazardous location shall be pre-approved by the Mosaic designated representative in all cases to insure that hazard controls are adequate. 10.2 Work in Wet or Damp Locations Work in damp locations shall be accomplished with the highest level of regard for safety. Equipment shall be powered through GFCI-equipped circuits. Energized electrical work shall be minimized except for testing or metering 10.3 Cords Flexible cords (extension cords) shall not be substituted for fixed wiring. Flexible cords shall be protected from accidental damage. Cords shall be routed so that they do not present a trip hazard in aisles and workspaces. Temporary wiring shall be run overhead where possible and never thorough walls, doors, partitions or holes in the floor or ceiling. This includes any extension cords or power strips used in cubicle, office or employee eating areas. Cords shall be kept at least six inches above floor surfaces wherever there is a potential for liquid leaks and spills. Insulation integrity must be assured or protected to prevent current leakages. A visual inspection for insulation damage is required before use. 10.4 Overriding Safety Interlocks When a qualified person is required to override safety interlocks, except to perform metering, testing, or troubleshooting equipment with or without the power on (i.e., energized electrical work), the following safe work practices shall be followed:

• Complete appropriate Critical/Interlock By-Pass/Jumper By-Pass form (permit) approved by appropriate management level.

• Overriding safety interlocks shall only be performed by qualified persons or qualified electrical workers who are experienced with the equipment being serviced and who understand the consequences of overriding the interlocks.



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• All safety interlocks shall be restored after the work has been completed. Where possible, positive confirmation should be made to verify that each interlock functions as intended. This may be accomplished by a de-energized, continuity check where possible or by activating the interlock with the equipment energized.

Switching Devices used to open circuits under load conditions must be designed to interrupt the current involved. A high percentage of accidents occur during switching operations. The following steps will minimize risk to personnel and equipment while performing switching:

• Secure authorization before performing any switching.

• Identify all equipment affected by operation.

• Notify all personnel affected by the switching operation.

• Once the worker is prepared to operate the switch, it should be operated as if it may fail.

• Personal protective equipment shall be worn as determined by the arc flash hazard warning label or as required by Appendix D.

• Identify the immediate blast zone. If the switch fails, where will the blast go? If you cannot operate the device remotely, stand off to the side that offers the most protection from an anticipated blast.

• Keep all unauthorized personnel out of the switching area.

• Make sure panel covers and doors are secure.

• Before re-energization, verify that all locks, blocks, ground jumpers, and tags have been removed and a qualified person has tested or inspected the circuit safe for re-energization.

Tool Control When the work is complete and prior to closing out an enclosure, an inventory of the tools used will be conducted, and thorough inspection performed.

Personal Protective Grounds



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During the performance of LOTO, if it is necessary to apply personal protective grounds, they shall be applied and removed by qualified electrical workers in accordance with the below procedures. Only after the equipment is appropriately de-energized, locked, tagged and verified (zero energy state) grounding may be applied.

Grounding cable sets must be rated for the maximum available fault current of the system on which they are applied.

When applying grounds, wear the personal protective equipment as listed in this policy.

NOTE: Refer to the appropriate JSA for each plant for the Procedures for the application of grounding cables.

• In close-clearance, low-voltage cubicles, it may be necessary to apply the grounds without an insulating handle.

• The application or removal of any ground shall be completed so it will not be required to cross an ungrounded system phase.

• All grounds shall be identified with a “GROUNDS INSTALLED” tag at same point of equipment lock out. Multiple grounds will require multiple tags.

• Grounds should be left on circuits except when it is necessary to remove them for testing while work is in progress.

• When any work requiring the removal of grounds is complete, the grounds shall be re-applied until final removal in preparation for re-energization.

Maximum Available Fault Current (kA)

ASTM Grade

15 Cycle Clearing Time

30 Cycle Clearing Time

Copper Cable Size (AWG)

1 14.5 10 #2 2 21 15 1/0 3 27 20 2/0 4 36 25 3/0 5 43 30 4/0

6 54 39 250 MCM 7 74 54 350 MCM



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Emergency Response Employees who are part of the emergency response team shall be trained in techniques for recognizing electrical hazards, coordinating with qualified facilities or equipment personnel to ensure that power is turned off (and various methods for accomplishing this) before attempting rescue, techniques for extracting persons from live circuits and first aid response. The persons shall be practiced and proficient in their response to ensure their own safety as well as the victims being rescued. They shall be regularly instructed in methods of first aid and emergency procedures, such as approved methods of resuscitation, if their duties warrant such training.

11. APPROVAL:

_______________________________________

Environmental, Health and Safety Officer/Date

12. REVISION LOG

Revision Log

Rev. No. Requested By Approved By Revised By Rev. Date

Contact the Subject Matter Expert (SME) for additional information on this program.

Appendix A

Categories of Test Equipment



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Sample:

Ref:

ANSI/ISA-61010-1 (82.02.01)-2004 Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 1: General Requirements

Appendix B

Job Briefing

Attendees Date:

Names Initials Names Initials

Identify

□ the hazards □ voltage levels involved □ skills required □ any foreign (secondary source) □ any unusual work condition □ number of people voltage source □ shock protection boundaries needed to do the job □ available incident energy □ potential for arc flash □ arc flash protection boundary Ask □ can the equipment be de-energized □ is a “standby person” required □ are backfeeds of the circuit to be worked on possible. Check □ Job Plans □ Single-line diagrams □ Status Board

Energy Category

Typical Uses

I

LV electronic equipment

II

Household and small Commercial 120/240V systems

III

3 Phase Industrial Systems and 277V lighting

IV

Utility Meters and Service Drops

Category III 1000V

Category IV 600V



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□ Information on plant vendor or vendor prints □ safety procedures resources is up to date □ vendor information □ individuals are familiar with the facility Know □ what the job is □ who else needs to to know □ who is in-charge -communicate Think □ about the unexpected event □ lock – tag – test – try □ use the right tools and What if?….. □ Install and remove grounds equipment including PPE □ install barriers and barricades □ What else….?

Prepare for an Emergency □ Is the standby person CPR □ is the required emergency □ where is the nearest trained? equipment available? telephone? □ where is the fire alarm? □ is confined space rescue □ what is the exact work □ how is the equipment shut-off available? location? In an emergency? □ are the emergency telephone □ where is the fire □ are radio communications extinguishers? available? Sample Job Briefing and Planning Checklist Appendix C

Hazard/Risk Evaluation Procedures

Before any task is performed on or near exposed energized conductors or circuit parts, the worker should determine

the degree to which he or she might be exposed to a safety hazard. If the worker might be exposed to a hazard, the

worker should determine whether the risk of injury is significant.

A hazard Risk Evaluation is an analytical tool consisting of a number of discrete steps intended to ensure that

hazards are properly identified and evaluated, and that appropriate measures are taken to reduce those hazards to a

tolerable level. This procedure is a comprehensive review of the task and associated foreseeable hazards that use

event severity, frequency, probability and avoidance to determine the level of safe practices employed. This

procedure includes:

(1) gathering task information and determining limits

(2) documenting hazards associated with each task

(3) estimating the task factors for each hazard/task pair

(4) assigning a safety measure for each hazard to attain an acceptable or tolerable level of risk.

While this procedure might not result in a reduction of PPE for a task, it can help in understanding of the specific

hazards associated with a task to greater degree and thus allow for a more comprehensive assessment to occur.

While severity, frequency, and avoidance factors are straightforward, consideration of probability includes the

following estimators:

(1) hazard exposure

(2) human factors

(3) task history

(4) workplace culture

(5) safeguard reliability

(6) ability to maintain or defeat protective measures

(7) preventive maintenance history



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Reduction strategies to be employed if an unacceptable risk cannot be achieved include the following hierarchy of

controls:

(1) eliminate the hazard

(2) reduce the risk by design

(3) apply safeguards

(4) implement administrative controls

(5) use personal protective equipment

The Steps of Hazard/Risk Evaluation

START

Gather task information and

determine task limits (scope)

Document task/hazard

pairs

Estimate risk factors for

each task/hazard pair

Assign safety measures for

each task/hazard pair

Is risk

acceptable?

Re-evaluate the

risk/hazard

Document

results on

Appendix B

END



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Appendix D

Required Personal Protection Equipment (PPE) For Electrical Work Standards

• ASTM D 120-02 approved insulating gloves rated for the highest voltage to be encountered.

• ANSI Z87.1 approved safety glasses.

• ASTM F 696-02 approved leather glove protectors

• ANSI Z87.1 approved safety glasses.

• ANSI Z89.1 approved electrically rated hardhat, types E and G

• ANSI Z87.1, ASTM F 2178-02 approved arc-rated face shield.

• ASTM F 1959-99 approved fire retardant pants and long sleeved shirt or fire retardant coverall with a

minimum arc thermal performance value (ATPV) equal to or greater than the highest incident energy which

may be encountered.

Insulating Equipment

• Insulating equipment made of materials other than rubber shall be rated to provide electrical and

mechanical protection at least equal to that of rubber equipment.

• PPE will be maintained in a safe, reliable condition and shall be inspected before each use and electrically

tested in accordance with Table One below. The equipment shall be replaced if the insulating capability of

the protective equipment is decreased due to damage during use. Before each use, the insulating equipment

will be visually inspected and again immediately following any incident where the equipment may have

been damaged. Visual inspections will consist of examining for holes, tears, punctures or cuts; ozone

checking; embedded foreign objects, textural defects such as swelling, softening, hardening or stickiness

any other defect that results in the degradation of the insulating quality.

• Insulating gloves will be inflated with air, then sealing off the in the cuff area or rolling up the sealed cuff.

The glove shall stay inflated with no leakage.

• Leather protective gloves will be worn over insulating gloves for:



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- Class 00 insulation - at greater than 250 volts or when required by arc flash

energy

- Class 0, 1, 2, 3, 4 insulation - at all times

- Daily glove checks will be recorded on a form similar to Table Five.

- Defective equipment will be removed from service and destroyed.

Table One. Rubber Insulating Equipment Testing Intervals

Type of Equipment Electrical Testing Frequency

Rubber Insulating Gloves Before first issue and every six months

thereafter.

Rubber Insulating Blankets Before first issue and every 12 months

thereafter.

Rubber Insulating Sleeves Before first issue and every 12 months

thereafter.

(Note: If any insulating equipment has been electrically tested but not

placed into service, it may not be placed into service unless it has been

electrically tested within the previous 12 months. Employees are

responsible for ensuring the above requirements are met prior to use.)

In Cases Where an Arc Flash Hazard Analysis HAS NOT Been Conducted, the Following Table May be Used in Selecting PPE refer to NFPA70E section 130.7(c)15

PPE Simplified – Two Category, Flame-resistant (FR) Clothing System

The use of Table H-I (NFPA 70E) is implemented at Mosaic as a simplified approach to provide

minimum personal protective equipment within the Mosaic facilities which has a large and

diverse electrical systems. The clothing system listed in this table should be used with the other

PPE appropriate for the Hazard/Risk category.

Table H-1. Simplified, Two-Category, Flame-Resistant Clothing System

Clothing Applicable Tasks

Everyday Work Clothing All Hazard/Risk Category 1, 2 and 2* tasks

FR Long-sleeve shirt with FR pants (minimum listed in Table 130.7 © (9) *

Arc rating of 8)

Or

FR Coveralls (minimum arc rating of 8)

Arc Flash Suit All Hazard/Risk Category 3 and 4 tasks listed

A total clothing system consisting of FR shirt in Table 130.7 © (9)*

and pants and/or FR coveralls and/or arc



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flash coat and pants (clothing system

minimum arc rating of 40)

*Note other PPE required for the specific tasks listed in Tables 130.7 © (9) and 130.7 © (10), which includes arc-rated face

shields or arc flash suit hoods. FR hard hat liners, safety glasses or safety goggles, hard hat, hearing protection, leather gloves,

voltage-rated gloves, and voltage-rated tools. Arc rating for garment is expressed in cal/cm2.

The assumed short-circuit current capacities and fault clearing times for various tasks are listed in the text and notes to Table

130.7 © (9). For tasks not listed, or for power systems with greater than the assumed short-circuit capacity or with longer than

the assumed fault clearing times, an arc flash hazard analysis is required in accordance with 130.3



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Protective Clothing and PPE Matrix (50V to 600V)

NOTES: All Qualified Persons are required to wear Hazard/Risk Category Level 2 clothing as required by this procedure when performing electrical work. This chart assumes one layer of Level 2 FR clothing for all Hazard/Risk Category jobs 1 and above. In specific instances when this matrix requires the arc flash suit, the appropriate superintendent and facility manager may grant variances on a case-by-case basis. Mosaic Safety Policy prohibits working on live parts for any voltages above 120 V. All exposed areas of the skin will be covered while working on exposed, energized equipment. When outerwear is required (e.g. jacket, parka, rain gear, etc.) it must be FR-rated. Hazard/Risk Category

Level 2 - 8 cal/cm2

Level 3 - 25 cal/cm2

Level 4 - 40 cal/cm2 H

aza

rd/R

isk C

ate

go

ry

Ru

bb

er

Glo

ve

C

lassific

atio

n

(wo

rn

with

lea

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rs)

To

ols

ra

ted

fo

r L

ine

-Lin

e V

oltag

e

Do

ub

le-la

ye

r S

witch

ing

ho

od

an

d h

ea

ring

p

rote

ction

Fla

sh

su

it (

mu

ltila

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r) inclu

din

g h

ood

Electrical Equipment (50V to 600V)

Panelboards or Switchboards

Circuit breaker (CB) or fused switch operation with covers ON (600 V and below) 0*

Circuit breaker (CB) or fused switch operation with covers OFF (600 V and below) 1

Work on energized parts, including troubleshooting and voltage testing (240 V and below) 1 00 X

Work on energized parts, including troubleshooting and voltage testing – (Above 240 V) 2 00 X X

Remove/install CBs or fused switches – 240 V and below 1 00 X

Removal of bolted covers (exposed, energized parts) 240 V and below 1 00

Removal of bolted covers (exposed, energized parts) MCC and panelboards above 240 V 2 00 X

Motor Control Centers (MCCs) and Switchgear

CB or fused switch or starter operation with enclosure doors Closed 0*

CB or fused switch or starter operation with enclosure doors open 2

Reading a panel meter while operating a meter switch 1

Work on energized parts, including voltage testing – 120 V or below exposed 1 00 X

Work on energized parts, including voltage testing – Above 120 V exposed 2 00 X X



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Insertion or removal of individual starter “buckets” from MCC 3 00 X X

Insertion or removal (racking) of CBs from cubicles, doors open 3 00 X

Insertion or removal (racking) of CBs from cubicles, doors closed 2 00

Application of safety grounds, after voltage test 2 00 X X

Removal of bolted covers (exposed, energized parts) Substation and switchgear class 3 00 X

Opening hinged covers (exposed, energized parts) 1 00 X

Other Equipment (including motors, transformers, terminal boxes, metering, cables, buses, etc.)

Removal of bolted covers (exposed, energized parts) 2 00 X

Opening hinged covers (exposed, energized parts) 1 00

Work on energized parts, including voltage testing 2 00 X X

Application of safety grounds, after voltage test 2 00 X

Insertion or removal 2 00 X

Cable trough or tray cover removal or installation 1 00

Protective Clothing and PPE Matrix (601V to 15kV)

NOTES: All Qualified Persons are required to wear Hazard/Risk Category Level 2 clothing as required by this procedure when performing electrical work.. This chart assumes one layer of Level 2 FR clothing for all Hazard/Risk Category jobs 1 and above. In specific instances when this matrix requires the arc flash suit, the appropriate superintendent and facility manager may grant variances on a case-by-case basis. Mosaic Safety Policy prohibits working on live parts for any voltages above 120 V. All exposed areas of the skin will be covered while working on exposed, energized equipment. When outerwear is required (e.g. jacket, parka, rain gear, etc.) it must be FR-rated. Hazard/Risk Category

Level 2 - 8 cal/cm2

Level 3 - 25 cal/cm2 H

aza

rd/R

isk C

ate

go

ry

Ru

bb

er

Glo

ve

Cla

ssific

atio

n

(wo

rn

with

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To

ols

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ted

fo

r L

ine

-Lin

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oltag

e

Tw

o-l

aye

r F

ully

Pro

tecte

d A

rc-r

ate

d f

ace

sh

ield

Fla

sh

su

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ood



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Page 32 of 48

Level 4 - 40 cal/cm2

Electrical Equipment above 601V to 15KV

Motor Control Centers (MVCs) and Switchgear

Contactor operation with enclosure doors open (7.2 KV and below) 2 2 X

Circuit breaker or switch operation with enclosure doors open (1 KV and above) 4 2 X

Circuit breaker or switch operation with enclosure doors closed(up to 7.2KV) 0*

Reading a panel meter while operating a meter switch

Work on energized parts, including voltage testing 4 2 X X

Work on control circuits with energized parts exposed 4 2 X X

Insertion or removal (racking ) of starters from cubicles, doors open 4 2 X

Insertion or removal (racking) of starters from cubicles, doors closed 2 2

Application of safety grounds, after voltage test 4 2 X

Removal of bolted covers (exposed, energized parts) 4 2 X

Opening hinged covers (exposed, energized parts) 3 2 X

Opening voltage transformer or control power transformer compartments 4 2 X

Other Equipment (including motors, transformers, terminal boxes, metering, cables, buses, etc.) 1 KV and above

Outdoor disconnect switch operation (hookstick operated) - 1KV to 72KV 3 2 X X

Outdoor disconnect switch operation (gang-operated, from grade) -1 KV to 72 KV 2 2



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Insulated cable examination, in manhole or other confined space 4 2 X

Insulated cable examination, in open area 2 2 X



Plymouth, MN 55441

Electric Procedure-NFPA 70E

Location/Applicability: Phosphate Business Unit Document Identifier:

Document Owner: Mike Neal, Dir HSS, Phosphates Business Unit SME: Steve Hughes, Operations Maintenance, Bartow

Effective Date: 5/24/2012 Review Due Date: 5/23/2015

EHSS-Phos-Electric_Procedure_NFPA_70E.docx Page 34 of 48 Effective Date: 5/24/2012

Protective Clothing and Personal Protective Equipment (PPE) Matrix

---------------------------------------------------------------------------------------------------------------------

Hazard /Risk Category Protective Clothing and PPE

Hazard Risk Category 0

Protective Clothing Non-melting or Untreated Shirt (long sleeve)

Natural Fiber Pants (long)

FR Protective Equipment Safety Glasses or Safety Goggles (SR)

Hearing protection (ear canal inserts)

Leather Gloves (AN) (Note 2)

Hazard Risk Category 1

FR Clothing, Minimum Arc Rating of 4 (Note 1) Arc-rated long sleeve shirt (Note 3)

Arc-rated pants (Note 3)

Arc-rated coveralls (Note 4)

Arc-rated face shield or arc flash suit hood

(Note 7)

Arc-rated jacket, parka or rainwear (AN)

FR Protective Equipment Hard Hat

Safety glasses or safety goggles (SR)

Hearing protection (ear canal insert)

Leather gloves (Note 2)

Leather work shoes (AN)

Hazard Risk Category 2 & 2*

FR Clothing. Minimum Arc Rating of 8 (Note 1) Arc-rated long sleeve shirt (Note 5)

Arc-rated pants (Note 5)

Arc-rated coverall (Note 6)

Arc-rated face shield or arc flash suit hood

(Note 7 & 2* note 10)

Arc-rated jacket, parka or rainwear (AN)

FR Protective Equipment Hard hat


Hearing protection (ear canal insert)

Leather gloves (Note 2)

Leather Work shoes

Hazard/Risk Category 3



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EHSS-Phos Reference - Electrical NFPA 70E

Guidelines.docx Page 35 of 48

FR Clothing. Minimum Arc Rating of 25 (Note 1) Arc-rated long sleeve shirt (AR) (Note 8) Arc-rated pants (AR) (Note 8)

Arc-rated coveralls (AR) (Note 8)

Arc-rated arc flash suit jacket (AR) (Note 8)

Arc-rated arc flash suit pants (AR) (Note 8)

Arc-rated arc flash suit hood (Note 8)

Arc-rated jacket, parka, or rainwear (AN)


FR Hard Hat liner (AR)



Arc-rated gloves (Note 2)

Leather work shoes

Hazard/Risk Category 4

FR Clothing. Minimum Arc Rating of 40 (Note 1) Arc-rated long-sleeve shirt (AR) (Note 9)

Arc-rated pants (AR) (Note 9)

Arc-rated coveralls (AR) (Note 9)

Arc-rated flash suit jacket (AR) (Note9)

Arc-rated arc flash suit pants (AR) (Note 9)

Arc-rated arc flash suit hood (Note 9)



FR Hard Hat liner (AR)



Arc-rated gloves (Note 2)

Leather work shoes

AN = as needed (optional)

AR = as required

SR = selection required

Notes;

1. See Table 130.7 © (11) Arc rating for a garment or system of garments is expressed in cal/cm2 2. If rubber insulating gloves with leather protectors are required by Table 130.7 (C) (9), additional leather or arc-

rated gloves are not required. The combination of rubber insulating gloves with leather protectors suffices the arc

flash protection requirements.

3. The FR shirt and pants used Hazard/Risk Category 1 shall have a minimum arc rating of 4.

4. Alternate is to use FR coveralls (minimum arc rating of 4) instead of FR shirt and FR pants.

5. FR shirt and FR pants used for Hazard/Risk Category 2 shall have a minimum arc rating of 8.

6. Alternate is to use FR coveralls (minimum arc rating of 8) instead of FR shirt and FR pants.

7. A face shield with a minimum arc rating of 4 for Hazard/Risk category 1 or a minimum arc rating of 8 for

Hazard/Risk Category 2 with wrap-around guarding to protect not only the face, but also the forehead, ears, and

neck (or alternatively, an arc rated arc flash suit hood) is required.

8. An alternate is to use a total FR clothing system and hood, which shall have a minimum arc rating of 25 for

Hazard/Risk category 3.

9. The total clothing system consisting of FR shirt and pants and/or FR coveralls and/or arc flash coat and pants and

hood shall have a minimum arc rating of 40 for Hazard/Risk category 4.

10. Alternate is to use a face shield with a minimum arc rating of 8 and a balaclava (sock hood0 with a minimum

arc rating of 8 and which covers the face, head and neck except for the eye and nose area.



Plymouth, MN 55441



Typical Protective Clothing Characteristics

NFPA 70E - Table 130.7 (C) (11)

Hazard/Risk Category

Clothing Description Required Minimum Arc rating of PPE j/cm3/(cal/cm2)

0 Non-melting, Non-flammable materials (I.e. untreated cotton, wool, rayon, or silk, or blends of these materials) with a fabric weight at least 4.5 oz./yd.

N/A

1 FR shirt and FR pants or FR coveralls 16.74 (4)

2 Arc-rated FR Shirt and FR pants or FR Coveralls

33.47 (8)

3

Arc-rated FR shirt and pants or FR coverall, and arc flash suit selected so that the system arc rating meets the required minimum

104.6 (25)

4

Arc-rated FR shirt and pants or FR coverall, and arc flash suit selected so that the system arc rating meets the required minimum

167.36 (40)

Note; Arc rating is defined in Article 100 and can be either ATPV or EBT . ATPV is defined in ASTM F 1959,

Standard Test Method for Determining the Arc Thermal performance value of Materials for Clothing as the incident

energy on material or a multi-layer system of materials that results in a 50% probability that sufficient heat transfer

through the tested specimen is predicted to cause the onset of a second degree skin burn injury based on the Stoll

curve, cal/cm2. EBT is defined in ASTMF 1959 as the incident energy on a material or material system that results in

a 50% probability of break open. Arc rating is reported as either ATPV or EBT, whichever is the lower value.



Plymouth, MN 55441



In Cases Where an Arc Flash Hazard Analysis Has Been Conducted, the Following Table May be Used in Selecting PPE Based on Incident Energy Ratings refer to NFPA70E section 130.5

Table H.3(b) Guidance on Selection of Arc-Rated Clothing and Other Personal Protective Equipment (PPE) for Use

When

Incident Energy Exposure is Determined by a Ar c F l a s h Hazard Analysis

Incident Energy Exposure

Protective Clothing and PPE

Less than or Equal to 1.2 cal/cm2

Protective clothing, non-melting (in accordance with ASTM F 1506-08) or untreated natural fiber

Shirt (long sleeve) and pants (long) or coverall

Other personal protective equipment Face shield for projectile protection (AN)


Hearing protection

Heavy-duty leather gloves or rubber insulating gloves with leather protectors (AN)

Greater than 1.2 to 12 cal/cm2

Arc-rated clothing and equipment with an arc rating equal to or greater than the incident energy determined in a hazard analysis (See Note 3. )

Arc-rated long-sleeve shirt and arc-rated pants or arc-rated coverall or arc flash suit (SR) ( See Note 3.)

Arc-rated face shield and arc-rated balaclava or arc flash suit hood (SR) (See Note 1.)


Other personal protective equipment Hard hat

Arc-rated hard hat liner (AN)


Hearing protection

Heavy-duty leather gloves or rubber insulating gloves with leather protectors (SR) (See Note 4.)

Leather work shoes

Greater than 12 cal/cm2 to 40 cal/cm2

Arc-rated clothing and equipment with an arc rating equal to or greater than the incident energy determined in a hazard analysis (See Note 3.)

Arc-rated long-sleeve shirt and arc-rated pants or arc-rated coverall and/or arc flash suit (SR)

Arc-rated arc flash suit hood

Arc-rated gloves

Arc-rated jacket, parka, or rain wear (AN)

Other personal protective equipment Hard hat

Arc-rated hard hat liner (AN)

Safety glasses or safety goggles (SR) .... Hearing protection

Arc-rated gloves or rubber insulating gloves with leather protectors (SR) (See Note 4. )

Leather work shoes

*See notations on next page



Plymouth, MN 55441



AN: As needed [in addition to the protective clothing and PPE required by

l30.5(B)(l)]. SR: Selection of one in group is required by l30.5(B)(l). Notes:

(!)Face shields with a wrap-around guarding to protect the face, chin, forehead, ears, and neck area are required by l30.8(C)(l0)(c). For full head and neck protection, use a balaclava or an arc flash hood. (2) All items not designated "AN" are required

by l30.7(CJ.

(3) Arc ratings can be for a single layer, such as an arc-rated shirt and pants or a coverall, or for an arc flash suit or a multi-layer system consisting of a combination of arc-rated shirt and pants, coverall, and arc flash suit. (4) Rubber insulating gloves with leather protectors provide arc flash protection in addition to shock protection. Higher class rubber insulating gloves with leather protectors, due co their increased material tbick.11ess ,provide increased arc flash protection.



Plymouth, MN 55441



Appendix E

Approach Boundaries

Limited Approach Boundaries Nominal System Voltage Phase

to Phase

Exposed Movable Conductor Exposed Fixed Conductor

50-750 V 3.05 m (10 ft.) 1.07 m (3 ft. 6 in)

751 V-15 kV 3.05 m (10 ft.) 1.53 m (5 ft.)

15.1 kV-36 kV 3.05 m (10 ft.) 1.83 m (6 ft.)

36.1 kV-46 kV 3.05 m (10 ft.) 2.44 m (8 ft.)

46.1 kV- 72.5 kV 3.05 m (10 ft.) 2.44 m (8 ft.)

72.6 kV-121 kV 3.25 m (10 ft.) 2.44 m (8 ft.)

Special requirement from facility E/I supervision and management is required to for any work closer than 10 FT from fixed or exposed conductors listed under approach boundaries. The Limited Approach Boundary is the distance at which unqualified persons and non-insulated equipment must be kept away from exposed live parts. An unqualified person may only cross this boundary if their job task absolutely requires it and then only under the continuous supervision of a qualified employee.

Restricted Approach Boundaries Nominal System Voltage Phase

to Phase

50-300 V Avoid Contact

301-750 V 304.8 mm (1 ft. 0 in)

751 V-15 kV 660.4 mm (2 ft. 2 in)

15.1 kV-36 kV 787.4 mm (2 ft. 7 in)

36.1 kV-46 kV 838.2 mm (2 ft. 9 in)

46.1 kV- 72.5 kV .990.2 m (3 ft. 3 in)

72.6 kV-121 kV 1.016 m (3 ft. 4 in)

The Restricted Approach Boundary is the distance at which unqualified persons may never cross. Qualified

employees must be wearing the proper voltage rated PPE, employ only insulated tools, have an approved procedure

and hazardous work permit or be performing an approved routine



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Prohibited Approach Boundaries Nominal System Voltage Phase

to Phase

50-300 V Avoid Contact

301-750 V 25.4 mm (0 ft. 1 in.)

751 V-15 kV 177.8 mm (0 ft. 7 in)

15.1 kV-36 kV 254 mm (0 ft. 10 in)

36.1 kV-46 kV 431.8 mm (1 ft. 5 in)

46.1 kV- 72.5 kV 660 mm (2 ft. 2 in)

72.6 kV-121 kV 838 mm (2 ft. 9 in)

The Prohibited Approach Boundary is an approach limit at a distance from an exposed energized electrical

conductor or circuit part within which is considered the same as making contact with the electrical conductor or

circuit part. This distance must not be crossed without PPE that protects the worker from the full circuit voltage.

Any person crossing the prohibited approach boundary must possess an authorized energized work permit. He or

she must also comply with all other restrictions and controls defined in this electrical safety document.



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Arc Flash Hazard Boundary - when an arc flash hazard exists, an approach limit at a distance from a

prospective arc source within which a person could receive a second degree burn if an electrical arc flash

were to occur. The arc flash protective boundary is the first issue to be determined in an arc flash hazard

analysis. The arc flash protective boundary defines the point at which FR protection is necessary to avoid a

second degree burn.

Voltage levels between 50 Volts and 600 Volts – the arc flash protection boundary shall be 4.0 ft. – based on the

product of clearing time of 2 cycles (0.333 sec) and the available bolted fault current of 50 KA or any combination

not exceeding 100 kA cycles (1667 amperes/second). When these numbers are exceeded, the arc Flash Protection

Boundary shall be calculated.



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Voltage levels above 600 Volts – the boundary shall be at a distance at which the incident energy equals 5 j/cm3

(1.2 cal/cm2). For situations where fault clearing time is equal to or less than 0.1 sec, the Arc Flash Protection

Boundary shall be the distance at which the incident energy level equals 6.24 j/cm3 (1.5 cal/cm

2)

Appendix F

Energized Electrical Work Permit

-

Part I. To be Completed by the Requester: For Work to be Performed: Date(s) ______________ Time(s):_________________

Description and location of the circuit and equipment to be worked on:

Justification for why the work must be performed in an energized condition:

Description of the safe work practices to be employed:

Results of the shock hazard analysis: (as a minimum, record highest nominal voltage to be exposed.)

Determination of shock protection boundaries: (See Appendix E)

Results of the flash hazard analysis: (For potentials > 208 V.) (Affixed labels may be used for this determination.)

The flash protection boundary: (For potentials > 208 V.) (Affixed labels may be used for this determination.)



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Personal protective equipment (PPE) determined necessary to safely perform the assigned task:

Means employed to restrict the access of unqualified persons from the work area:

Evidence of completion of a job briefing including a discussion of any job-specific hazards:

Do you agree the above described work can be done safely? Yes □ No □

_____________________________ ________________________ Submitted (Qualified Worker) Reviewed (Supervisor) _____________________________ (See Appendix J for approval matrix) Approved Date

Appendix G



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Appendix H

Sample Arc Flash Warning Labels



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Appendix I Personal Protective Equipment Sample Illustrations



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Appendix J



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Approval matrix for energized electrical work

Less than 600 volts – EI Supervisor responsible for task

600 volts to 5 KV – EI Department superintendent/Manager

5 KV to 15 KV – Facility maintenance manager

Over 15 KV volts – Facility plant manager

Documents

Electric Procedure-NFPA 70E