DIVISION 16 ELECTRICAL - Miami-Dade County Public Schoolsfacilities.dadeschools.net/Planning/design criteria 2019... · 2020. 10. 9. · October, 2020 Electrical 16 - 3 Issued Design

October, 2020 Electrical 16 - 1

Issued Design Criteria M- DCPS

DIVISION 16 – ELECTRICAL

This division contains the following elements:

1.1 General Electrical Requirements. 1.2 Electrical Distribution System. 1.3 Power Distribution System. 1.4 Photovoltaic System – Infrastructure Requirements. 1.5 Lighting System. 1.6 Emergency Power Distribution System. 1.7 Fire Alarm Detection System.

1.1 GENERAL ELECTRICAL REQUIREMENTS

A. Work within this division shall include, but is not limited to, architectural, engineering, and specialized consultant design to install electrical systems in the most professional and

economical way to satisfy M-DCPS requirements.

B. Low voltage raceway systems, except fire alarm, are not included in this Division. Raceway systems including but not limited to fire alarm shall be designed in accordance with this

Division. See Division 13 for telecommunications/data, intercom, clock/bell, ITV/media

retrieval, intrusion detection, CCTV, card access, and energy management systems for

raceway sizing requirements.

C. Codes and Standards. 1. The electrical work shall comply with the requirements of the applicable authorities

having jurisdiction and with the following National, Local codes and standards:

a. Florida Department of Education, Office of Educational Facilities – State Requirements for Educational Facilities (SREF).

b. National Electrical Code (NFPA 70). c. Florida Building Code (FBC). d. M-DCPS Design Standards and program requirements. e. M-DCPS Master Specification Guidelines. f. National Fire Prevention Association (NFPA) codes and standards. g. Institute of Electrical & Electronics Engineers, Inc. (IEEE) standards. h. Florida Accessibility codes. i. American National Standards Institute (ANSI). j. American Society of Civil Engineers (ASCE). k. Americans with Disabilities ACT Accessibility Guidelines Requirements

(ADAAG).

l. All other applicable National, Local codes and standards. m. Illuminating Engineering Society of North America (IESNA). n. All electrical equipment shall be listed by an OSHA approved Nationally

Recognized Testing Laboratory (NRTL).

D. Lightning Protection. 1. According to NFPA 780 and the FBC, educational facilities have a risk index of severe

and shall be protected accordingly.

2. Direct lightning protection is required for the television antenna and flagpole.



3. Provide transient surge/lightning protection at the main electrical switchgear and the second-tier distribution level, and at other systems as indicated in Division 13 and 16 of

the Design Criteria.

E. Products. 1. Provide certified or listed parts, equipment, assemblies, and installations when

categories for such individual electrical components and systems are listed by a

Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA.

2. Unlisted or uncertified submittals, equipment, and construction may be reviewed on a per condition basis.

F. Coordination. 1. Confirm M-DCPS design requirements are incorporated in the drawings and

specifications and do not allow interpretation.

2. Contract Documents shall include new or existing main electrical service, main distribution systems, and related underground services as it affects the scope of work.

3. Review FPL rebates and design incentives, or any other rebate programs to incorporate energy efficient equipment or systems into the project.

4. For projects involving additions, alterations, or renovations, M-DCPS will furnish electrical and underground utility as-built site plans, upon request and when available.

It shall be the responsibility of the A/E using these plans to verify accuracy by visiting

the site, verifying utility companies’ records, study the feasibility of new main electrical

service on new additions and to return all borrowed plans to M-DCPS.

5. Connect any electrical equipment or devices installed under other trades. Coordinate with other construction documents and subcontractors to prevent omissions or field

conflicts.

6. Coordinate with Division 7 and 15 for clearances between the finished roof and equipment and other related items. See Division 5 for equipment framing supports.

G. Provisions for Future Expansion. 1. At new school projects, provide spare capacity in the switchboard and the control panel

or equipment of each low voltage system to serve future building expansion by

addition(s) or by portable classrooms as noted in Division 13.

2. Provide empty conduits for each system from its central equipment to school building exterior. Cap and mark all conduits for future building expansions.

H. New Services. 1. The power service entrance and the main distribution equipment proposed for new or

existing sites require acceptance by M-DCPS Building Official.

2. Facilities shall be supplied by only one service unless otherwise accepted in writing by MDCPS Facility Design and Standards. The A/E shall compare the cost involved in

adding new breakers in existing switchboards, to adding a new service for the new

building, as per NEC Article 230.2(A) thru (D), to reduce construction cost. The results

of the investigation shall be given to M-DCPS Facilities Design and Standards for their

review. Request for acceptance shall be submitted in Phase I Design before continuing

with the work.

3. Each submittal shall be properly documented and based on program needs, the size and location of the addition, the recorded school load, and survey of actual conditions.



1.2 ELECTRICAL DISTRIBUTION SYSTEM

A. Voltage Drop and Short Circuits. 1. Allowable voltage drop shall be according to NEC 210-19 and 215-2. 2. The symmetrical fault current at any distribution, lighting, or power panelboard shall be

calculated from the maximum available fault at service entrance, according to utility.

Obtain in writing from Florida Power and Light (FPL), the maximum symmetrical fault

circuit current for the past 12 months and submit to M-DCPS. Incorporate calculations

results on drawings next to Power Riser Diagram for new facilities and major additions.

B. Distribution System Voltage. 1. In new school projects, use 277/480V, 3-phase, 4-wire, grounded wye wherever

possible.

2. Use of 120/208 volts, 3-Phase, 4 wire grounded wye or 120/240V single phase requires prior acceptance by M-DCPS on a per condition basis.

3. Large addition projects, equal or larger in area to the existing school, without lighting upgrades to the existing schools and with a 208V or 240V distribution systems, use

277/480V for the new construction. Allocate a new building main at the new

construction to feed the existing school maximum demand through a new stepdown

transformer. The existing school shall remain as presently designed and wired.

4. Large addition projects using 480V which include a lighting replacement for the existing school shall use 277V lighting for the entire school. Any 120V panel that feed

the old lighting shall remain as spare capacity to serve future computers in classrooms.

A/E shall include in the design, the rewiring of the entire existing lighting wiring

system for the new lighting replacement project. Other 120V loads shall remain “As-

is”.

5. All electrical services shall be grouped at one location at the school site. Exception: Fire pump.

C. Switchboards. 1. Main and distribution switchboards shall be either circuit breaker or fusible switch type

depending on available fault current, and ground fault system protection.

2. Provide a maximum of six disconnect means as permitted by NEC 230.71 (A). Additional disconnects means may be permitted as per NEC 230.72(B).

3. To reduce construction costs, main circuit breakers shall not exceed 1600 amperes, unless accepted by M-DCPS on a per condition basis. Provide additional mains as

required to meet load conditions.

4. Provide local distribution panels with series protection to contain the small ampacity breakers as needed, instead of small ampacity breakers in switchboards with large

frames and high interrupting capacity.

5. Surge/ Protection Devices shall be provided at the main switchboards and at a second-tier distribution level.

6. Bus bars in switchboards, busways, panelboards, and motor control centers shall be copper.

7. A/E shall specify the switchboard with an intelligent meter capable of remote monitoring by the school EMS system.

8. Floor mounted switchboards and motor control centers shall be on 4-inch high concrete pads.



9. Switchboards and distribution panels shall have a minimum spare capacity to satisfy SREF and FBC requirements.

D. Power Service Entrance. 1. Service entrance shall be underground, in painted galvanized rigid steel (GRS) or

Concrete-encased Schedule 40 polyvinyl chloride (PVC) conduits. Overhead services

are not allowed.

2. The service entrance shall be centrally located to allow shorter distribution feeders. 3. Service entrance, transformer pad, transformer vault, underground conduit, pull boxes,

grounding, and other provisions for electrical utilities shall be according to the utility

company’s requirements.

4. Coordinate the point of service and the location of the service transformer with M-DCPS and FPL.

5. Include in the drawings, configuration and routing of the utility company’s underground primary service conduits to a pad-mounted transformer or vault.

6. Obtain, sign, and resubmit FPL’s specifications regarding pad-mounted transformers, transformer vaults, underground service conduits, and other related requirements to be

included in Phase 3 submittal.

7. All transformer vaults shall be designed following FPL’s latest design guidelines.

E. Service Transformer. 1. Service transformer shall be pad-mounted whenever possible. Overhead transformers

are only allowed for temporary service when accepted by M-DCPS Facilities Design

and Standards on per condition basis.

2. Pad-mounted transformer or vault location will be based on site and load requirements, accessibility, and proximity to utility lines.

3. Pad transformers or vault size will be decided by the utility company based on load requirements, provisions for future expansion, ventilation, and other utility

requirements.

4. Coordinate with FPL the type and location of the metering equipment. 5. Locate a pad-mounted transformer at the building perimeter and next to the main

electrical room. See Division 2 for fencing requirements.

F. Equipment Location. 1. Install switchboards and panelboards according to manufacturer’s recommendations

and maintain clearances and working spaces required by the NEC 110.26 and OSHA.

2. The main electrical room shall be centrally located next to the transformer vault/pad and contain the main switchboard that receives the service entrance. Main electrical

room shall be a dedicated room with 2 entry/exit doors (when required by NEC 110).

Doors shall open to the exterior of the building in the direction of exit and equipped

with panic hardware.

3. Switchboards, distribution panelboards, contactors, and any other electrical control or distribution equipment shall be installed in electrical rooms and not in student occupied

areas. Equipment shall be key-locked in all electrical rooms.

4. Lighting and power panels may be installed in dedicated electrical rooms or staff occupied areas for shorter branch circuiting and users’ local control. Lighting and

power panels shall not be installed in corridors.

5. Provide, in the existing switchboard, a disconnect/overcurrent protection device to feed the power conductors of new building at existing facilities. Study feasibility of



providing a new electrical service as per NEC Article 230.2 (A) to reduce construction

costs. Submit findings to M-DCPS Facilities Design and Standards for approval. If not

feasible, obtain written acceptance from M-DCPS Facilities Design and Standards in

Phase 1 to use new mains, new service entrances, or new service laterals from the FPL.

6. Step down transformers shall be located in electrical rooms only.

G. Cables and Wires. 1. Cables and wires shall be copper. 2. Cables and wires for use in underground conduits shall be listed for “wet locations use”,

by a Nationally Recognized Testing Laboratory (NRTL) recognized by OSHA.

3. Aluminum conductors are not allowed.

H. Conduits. 1. Underground secondary service entrance conduits from the utilities transformer shall be

painted galvanized rigid steel conduit (GRS) or concrete-encased PVC conduit.

2. Conduits shall be sized according to NEC, but feeders and home runs shall not be less than 3/4" diameter and 1/2" thereafter. See Division 13 for low voltage system conduit

requirements.

3. Provide pull wires in empty raceways where no conductors are installed. Provide marking tags showing opposite destination noting building and closet number at each

end.

4. Conduits shall be underground or concealed in walls or ceiling spaces in normally occupied spaces. Exposed conduit, except in electrical, telecommunications, and

mechanical rooms, requires M-DCPS acceptance on a per condition basis.

a. Interior conduits shall be steel. b. Set screw fittings and compression fittings shall be steel. c. PVC conduit can only be used at interior locations if embedded in concrete or

installed under slabs on grade.

d. Exterior conduits for underground use shall be painted GRS or PVC Schedule 40, direct buried or concrete encased according to M-DCPS Master Specification.

e. Exterior exposed conduits in wet locations shall be GRS, IMC, or PVC flexible metal conduit with PVC sun-resistant jacket with liquid tight steel fittings.

Exterior exposed conduits may be EMT, if it is located a minimum of 96" AFF, and if it is protected from direct rain.

f. All exposed conduits shall be painted to match adjacent surfaces, in accordance with M-DCPS Design Standards.

g. Direct buried underground conduits for low voltage systems and feeders, shall be installed in accordance with NEC Table 300.5. Use proper spacers between

conduits and 3-inch-wide electrical warning tape 8 inches below grade.

h. The use of directional boring, also referred to as horizontal directional drilling (HDD), is acceptable on M-DCPS projects. The use of HDD methods shall comply

with applicable Codes, OSHA, and M-DCPS Design Standards.

5. Conduits requiring concrete encasement shall comply with the following: a. Concrete encasement shall have 3-inch minimum cover on all sides and 2-1/2"

minimum clear separation between power conduits.

b. The minimum separation between power conduits and signal conduits in the same concrete encasement shall be 3 inches.



c. The minimum depth of concrete encased duct banks beyond the building perimeter shall be 24 inches to the top of the concrete encasement.

6. Electrical conduits serving light fixtures and other devices located at metal canopies and metal covered walkways shall be mounted to the underside of the structure without

penetrating the metal roof deck.

I. Pull Boxes. 1. Provide underground pull boxes where sharp bends, branching, or more than four 90º

bends are required. For long conduit runs, provide pull boxes every 250 feet maximum.

2. Metal cover shall be grounded. 3. Non-concrete covers shall be bolt-down type with stainless steel screws. 4. Provide a traffic type cover where there is any possibility of vehicular traffic. 5. Pull boxes in corridors or pedestrian traffic areas including sidewalks are not allowed.

J. Grounding. 1. Connect the grounding system of any facility or standalone building to the copper

domestic water main entrance with at least 10 feet of its length below grade where is

enters the building in accordance with NEC 250-50 and 250-52, and to the structural

steel. Add 3/4" diameter, 10-foot long ground rods to the grounding electrodes to obtain

a maximum 25 Ohms of resistance to ground.

2. Grounding system shall be wired from the main switchboard to all panelboards. 3. Feeders and branch circuits shall have copper ground conductors. Do not use conduits

as ground paths.

4. Provide continuous grounding for microprocessor equipment.

1.3 POWER SYSTEM

A. Provide a main circuit breaker to each panelboard sized according to Code.

B. All lighting and power panels shall be provided a minimum of 20 percent spare breakers and a minimum of 10 percent spare capacity in all main panels and switchboards according to

State Requirements for Educational Facilities (SREF).

C. For large groups of motors, provide a motor control center with a transformer with 120-volt secondary for control circuits, “hand-off-auto” selector switch, and “on-off” showing lights

in each starter.

D. Transient surge protection devices shall comply with UL 1449-Third Edition, ANSI C62.41-1991/1EEE C62.45-1987 IEEE, and other applicable codes.

1. Protection shall be provided at the main switchboard level and second tier panelboards: a. Phase to phase. b. Phase to neutral. c. Phase to ground.

2. Clamping voltage shall be 120 percent of the nominal peak line voltage.

E. Provide control wiring and interlocking for the operation of all motor loads, as required by each motor circuit or dust collectors, fire suppression systems, or any other mechanical

equipment.



F. Install magnetic starters or thermal overload switches for roof fans or other similar equipment at an interior location. If an integral service disconnect switch is not provided

with the equipment, provide an un-fused NEMA 3R safety disconnect switch or a

weatherproof manual motor-rated switch on the roof near the equipment. Group multiple

fans together when practical.

G. Provide for wired remote control operation and a separate circuit for the scoreboards in gymnasiums.

H. Provide non-linear electrical panels to supply receptacle outlets dedicated to computers/data. 1. These panels shall not feed any other loads. 2. Have 200% rated neutral bars, with the neutral feeder conductor rated at 200% of phase

conductors.

3. Dry type step down transformers (480V/120-208V) feeding non-linear loads shall be K-13 type only.

I. In industrial education classrooms and shops, provide power column drops from overhead wire-trays to each workbench and to electrically driven machinery.

1. During normal operation, the power supply shall be through a keyed, magnetic controlled relay “ON/OFF” at instructor’s area.

2. Provide for emergency power shut-off from the instructor’s station and at other locations of the instructional space as required by FBC regarding special life safety

provisions.

3. Master control switch in vocational labs were In-Contract and Not-In-Contact power tools are being used, shall have a manual reset switch to prevent automatic restart of

power equipment after power failure.

J. Provide electrical receptacles according to Code, M-DCPS Educational Program requirements, and the following:

1. Receptacles shall be 20-Amp minimum. 2. Receptacles installed outdoors, in wet locations, science labs, staff toilet rooms or

within 6 feet of water supplies shall have ground fault protection by a built-in or

upstream protection device.

3. Exterior receptacles shall have a weatherproof gasketed cover. This requirement does not apply to single receptacles serving only water coolers.

4. In interior circulation areas, corridors, lobbies, atriums, etc., provide 120V receptacles for custodial equipment use, at intervals not to exceed 50 feet. Receptacles shall be on

dedicated 20-amp circuits.

5. A minimum of eight (8) appropriately placed convenience duplex receptacles shall be provided in each instructional space (two at each major wall). See program

requirements for other electrically operated equipment in the instructional space to have

separate dedicated receptacles or connections to a separate circuit other than the

convenience receptacle circuits.

6. When Code requires a percentage of the electrical receptacles located within a specific area be “automatically controlled” for energy conservation purposes, the AE design

shall comply with the following:

a. Receptacles serving computer CPUs shall not be automatically controlled, however, receptacles for computer monitors shall be controlled.



b. Receptacles serving Interactive Display Panels shall not be automatically controlled.

c. Four of the eight receptacles required at the Teacher’s Tech Center shall not be automatically controlled. The other four receptacles shall be automatically

controlled.

d. Receptacles for network copiers, and other electronic devices that require electrical power to avoid hard-shutdown and/or receive after-hours security-related software

updates, shall not be automatically controlled.

e. A/E shall specify that receptacles that are automatically controlled shall have a factory installed “Controlled Receptacle Marking Symbol” on the face of the

receptacle.

f. A ceiling mounted occupancy sensor shall be used to provide automatic control of the receptacles located within each area.

g. During the Design Phase, A/E shall coordinate with the Building Official to ensure the intent of these requirements will be acceptable to them

7. Locate voltage transient protection at low voltage panels feeding electrical outlets for computers and other vulnerable solid-state devices. Transients control system shall not

short circuit the electrical system.

8. Provide a GFI duplex receptacle at each student workstation table in science Demonstration Classrooms and Science Labs.

9. Provide receptacles in a 4-inch metal surface raceway with recessed receptacles, wall mounted at classrooms and labs with a high concentration of electric equipment for

students’ training.

10. Provide emergency quick disconnect switches in science labs, industrial education classrooms/shops, and other locations according to SREF and FBC.

11. Offset receptacles in common walls of adjacent music rooms to maintain room envelop sound ratings and use baffles and sound insulation materials to minimize sound

transference through walls.

12. In computer labs, provide wall-mounted metal raceways for data and power. Provide self-standing raceways if away from walls.

13. At auditoriums or multipurpose rooms, provide convenience receptacles at walls spaced at intervals not to exceed 20'-0".

14. In gymnasiums, provide a minimum of eight (8) appropriately spaced convenience receptacles. Coordinate locations of receptacles with location of bleachers.

15. Provide a duplex GFI protected receptacle in each mechanical, electrical and custodial rooms and on either side of each electric domestic cooking range.

16. Do not locate outlets in bulletin boards, tackboards, or markerboards. 17. Receptacle boxes at food service areas shall be located according to manufacturer’s

recommendation or as follows:

a. Provide in-use covers as required. b. Wall mounted 84 inches above finish floor when behind refrigerators. c. GFI protected wall mounted 42 inches above finish floor to the centerline of a

horizontal box when above counters.

d. GFI protected floor mounted at freestanding equipment, based on equipment requirements:

1) An outlet box with top at least 6 inches above finish floor. 2) 18-inch-high conduit rough-in for hard wire connection.



18. Locate a bell or buzzer outside the food service manager’s office switched from the receiving door.

19. At shops and other locations with motor operated equipment, coordinate power at receptacles according to manufacturer’s requirements.

20. Provide a 120V duplex receptacle (GFI) within 4 feet of the water treatment system. 21. Provide the main EMS controller and each AHU controller their own separate 120V

duplex receptacle, each on a dedicated circuit.

22. See the “Electrical” section of the General Considerations of the Educational Specifications for additional requirements.

K. The wiring of 120V branch circuits extending more than 100 feet from the panelboard to the nearest outlet shall be No. 10 wire minimum.

L. Use 3 phase kilns to avoid unbalancing the power sources.

M. Provide the following for the Non-In-Contract hand-held radio system: 1. The Not-In-Contract radio repeater equipment shall be located in an air-conditioned

secured room supervised by the School’s administrative staff.

2. Provide one 120V duplex outlet on a 20-Amp dedicated circuit, connected to emergency power.

3. Provide one 2-inch conduit from the repeater to the antenna location. 4. Provide lightning protection for the repeater’s antenna.

N. See Division 10 - Specialties for information regarding electric hand dryers.

1.4 PHOTOVOLTAIC SYSTEM - INFRASTRUCTURE REQUIREMENTS

A. On New Construction and New Addition projects, and on projects containing major re-roofing work, A/E design shall include provisions for solar panels to be installed on the roof-

decks of the following areas:

1. PE Shelters. 2. Covered Dining Shelters. 3. Covered Walkways. 4. New buildings. 5. Existing buildings scheduled for major re-roofing.

B. During preliminary design phase, the A/E shall confirm with M-DCPS Facilities Design and Standards exact areas to be designated “Solar Panel Ready” based on scope of work and

specific site conditions.

C. A/E is required to review possible solar panel layouts with a qualified solar panel provider to properly plan for and document areas of future solar installation. All information regarding

assumed panel location, structural support and loading shall be clearly indicated on A/E’s

drawings to be submitted to M-DCPS for review and acceptance.

D. Provisions for “Solar Panel Ready” shall include but not be limited to: 1. Provide clear roof areas free of penetrations and equipment to allow for the most

efficient layout of solar panels.



2. Provide 2-inch conduit and pullstring from the main electrical panel to all areas receiving solar panels.

3. Structural support necessary to structurally bear and connect solar panel system, including ballast-type solar systems, to ensure compliance with their appropriate NOA

or Florida Product Approval requirements.

4. Coordinate solar panel connection-points to minimize penetrations in roof membrane and maintain required NOA and roofing system warranty.

5. For purposes of design, assume a solar panel system that will generate a minimum of 100kW to gain highest efficiency of cost/kW installed.

E. Installation of the solar panel system including, racks, wiring, inverters, and all other required equipment will be performed “by others” via a separate contract. This installation

will be “net metered”, meaning that in the future, FPL will provide an upgrade to the

existing meter to allow surplus power generated by the solar panel system be transferred

directly to the electrical grid (no battery storage required).

1.5 LIGHTING SYSTEM

A. General Illumination: 1. Classroom illumination (classrooms and labs) shall provide an average maintained foot-

candle level in accordance with FBC latest edition and other spaces shall follow the

recommendation of the Illuminating Engineering Society North America (IESNA),

latest edition.

2. Gymnasium illumination shall provide a minimum of 50 foot-candles at floor level, and a lamp source yielding 6500˚ K.

3. Illumination Factors: a. Reflectance shall be considered as close as possible to actual and properly

documented for walls, ceiling, and floors. For a "typical" classroom the reflectance

shall be 50, 80, and 20 respectively.

b. Maintenance and dirt factors shall be 1.0. 4. The school lighting system shall meet a nationally recognized high-performance green

building rating system as approved by the Department of Management Services like

USGB leadership in Energy Design (LEED) or others.

5. Life cycle cost analysis shall be performed in selecting the most advantageous luminaires and lighting source for the application. Refer to the Life Cycle Cost

guidelines for materials and buildings for Florida’s Educational Facilities for the

development of the analysis.

6. Provide a computer-generated printout or the foot-candle levels for typical classroom layouts. The lamp lumen output shall be based on photometric data provided by an

independent testing laboratory.

7. DO NOT use coffered type light fixtures. 8. Avoid placing light fixtures directly above projection screens; if necessary, provide

switching of the fixture allowing teacher control of fixture.

9. All new lighting fixtures shall be Light Emitting Diode (LED) type fixtures. For specialty areas such Gymnasiums, other type fixtures may be considered only with prior

written approval from M-DCPS Facilities Design and Standards.

B. Specialty lighting shall be according to program requirements. Theater stage and general lighting shall be LED type.



C. Lighting fixtures in flammable storage rooms, spray booths, and other hazardous locations, shall meet the requirements of NEC Chapter 5.

D. Parking and site lighting shall be according to the latest edition of SREF and FBC requirements, local regulations, program requirements, and as recommended by M-DCPS

School Police.

1. Parking areas shall be illuminated using LED light fixtures. 2. Pole mounted lighting fixtures shall have fuses at the base of the pole, not at the top, in

the light fixture nor the in-ground box.

3. Lighting spillage and glare into residential properties shall be controlled with factory provided shields or directional LED fixtures. Use sharp cut-off lighting fixtures to

comply with dark sky requirements.

E. High pressure sodium (HPS) lighting fixtures are not allowed.

F. Lighting of exterior corridors and building perimeter shall be designed to have normal lighting illumination levels required when occupied and security lighting illumination levels

when the facility is not occupied.

1. Provide security lighting to illuminate exterior walls of buildings, building entrances, service yards, in parking lots, and other locations according to program requirements

and M-DCPS School Police.

2. Security lighting shall be designed to provide visibility to all exterior elevations of the facility without creating shadows. Lighting shall be focused toward the building and not

illuminate adjacent property, as directed by current code.

3. Mount lighting at building perimeters to be serviced from roof decks. 4. Provide a minimum of two foot-candle for walkway covers and canopies. 5. Provide an average of one foot-candle for building perimeter lighting. 6. Provide an average of five foot-candle at building entrances. 7. Provide an average of one (1) foot-candle for courtyards.

G. Athletic playing field lighting, if required by program requirements, shall be at least 30-foot candles measured at the surface.

H. Do not provide lighting at shelters unless required by program requirements.

I. Do not provide decorative lighting for planters, landscaping, walls of buildings, or school names unless program required.

J. Provide emergency lighting according to the “Emergency Power Systems” section of this Division.

K. Lighting shall be 277V when possible. Renovation and addition projects may use 120V, if 277V is not available.

L. Bare lamps are not allowed at interior or exterior lighting fixtures. 1. Lighting fixtures shall have solid, protective lenses. 2. Exterior lighting fixtures shall be vandal resistant and labeled for wet locations if

exposed to rain.



3. Provide impact resistant lens covers at all gymnasium lighting fixtures and at other locations according to program requirements.

4. Provide wire guards to protect fixtures located in mechanical rooms, electrical rooms, telephone rooms, and custodial areas.

M. Wall mounted fixtures shall be at least 7'-6" above finish floor.

N. Lighting fixtures shall be located to provide easy access for repairs and replacement of fixtures.

O. Locate lighting fixtures within vertical reach of portable lifting machines.

P. Lighting fixtures at stairs shall be over landings at an elevation not exceeding 12 feet above the landing elevation.

Q. Pendant lighting fixtures are only allowed in spaces with ceiling heights greater than 12 feet above finish floor. The bottom of the fixture shall be at least 9 feet above finish floor.

R. LED lighting fixtures shall comply with the following requirements: 1. The LED light source color shall be 4100˚K. 2. Operating life of the LED source shall exceed 50,000 hours at 25˚C ambient

temperature.

3. Efficiency of the LED light fixture shall exceed 95%. 4. LED fixtures shall be listed by a Nationally Recognized Testing Laboratory (NRTL)

recognized by OSHA.

S. When the use of fluorescent fixtures is approved by M-DCPS Facilities Design and Standards, fluorescent fixtures shall comply with the following requirements:

1. Fixtures shall be provided with high efficiency programmed start electronic ballasts and T-8 energy saver lamps (4100˚K). Electronic ballast and lamp systems shall have at

least a 5-year warranty and a total harmonic distortion not exceeding 15 percent.

2. Lamps shall have low mercury content not to exceed 2.0 mg of mercury and be TCLP-compliant.

3. Efficiency of the lamp/ballast/fixture shall exceed 85%. 4. Lamps shall have a minimum rated life of 40,000 hours, a CRI of 85, and a lumen-

maintenance of 97%.

5. Use dual switching to achieve low level lighting instead of dimming ballasts. 6. Use linear fluorescent lamps. 7. Fluorescent fixtures shall be listed by a Nationally Recognized Testing Laboratory

(NRTL) recognized by OSHA.

T. High Intensity Discharge (HID) lighting shall be used only when required by the Educational Program or if approved by M-DCPS Facilities Design and Standards.

U. Incorporate lighting systems requiring less energy to operate while also improving the light quality in the learning environment. The cost of implementing new technologies shall be

considered when selecting lighting systems.

V. Sodium vapor and incandescent light sources are not allowed.



W. Lighting Control. 1. Lighting control for emergency lighting, if needed, shall be according to NEC-700-20

and 21.

2. Do not use panelboard circuit breakers as operating switches. Provide readily accessible local switches as required at main entrances of instructional spaces.

3. Ceiling mounted motion sensors shall be used for lighting control in all normally occupied spaces except in spaces where the failure of the motion sensor to operate

properly or failure to detect occupants in that space might endanger the occupants, such

as in mechanical rooms or electric rooms.

4. Provide ceiling mounted motion sensors to control lighting in interior corridors. Motion sensor shall be spaced as recommended by manufacturer.

5. Light switching in a space requiring emergency lighting shall have relays to allow local on/off switching and to turn on emergency lighting automatically upon power failure.

Provide an extra control switch to allow the use of emergency lighting fixtures for

limited illumination in instructional spaces.

6. Classroom lighting shall be capable of two levels of lighting. One mode at full level lighting and one mode at reduced lighting level. The two levels of lighting shall switch

from front of classroom to back of classroom to allow for the darkening of the front of

the room for audio/visual presentations.

7. Security/outdoor lighting shall be controlled by a photocell to turn “on” system and the school's Energy Management System (EMS) to turn “off”. If EMS is not available,

provide photocells or other means of control. See Division 13 for EMS information.

8. Provide switches with pilot lights for attic lights, roof lights, and remotely controlled equipment.

9. Lighting located in gymnasiums, locker rooms, assembly rooms (except in elementary schools), student toilets, corridors, covered walkways, other exterior locations and

unsupervised rooms accessible to students, shall be remotely switched from the nearest

custodian's room or closet and have switch identification.

10. Use relays or contactors to control HID or fluorescent lighting loads in gymnasiums, athletic fields, and other areas. Relay or contactor operation shall be controlled by key

operated switches. Lighting contactors shall be mechanically held. Switches shall be

located in a lockable cabinet.

11. Scoreboards in a high school gymnasium shall be controlled by a lockable type switch labeled "SCOREBOARDS".

12. Stage lighting shall be independent of any additional programmed required instructional space lighting.

13. Solar-powered school speed zone flashing light systems shall be incorporated into the design of facilities. The solar-powered flashers shall comply with all Miami-Dade

County Public Works criteria and requirements.

1.6 EMERGENCY POWER SYSTEM

A. Emergency power shall be available automatically to transfer the life safety load within 10 seconds after failure of the normal power supplied to the facility. The optional stand-by

loads shall transfer in 30 – 60 seconds after failure of normal power.

B. Initial source of emergency power shall be provided from a separate service lateral located ahead of the main service disconnect.



C. Backup emergency power shall be provided by any one of the following: 1. Rechargeable central storage battery system. 2. Generator-supplied power with automatic transfer switch. 3. Un-interruptible power supply (UPS) with battery back-up and inverter integral

automatic transfer mechanism.

4. “Unit equipment” type emergency lighting devices in accordance with NEC Article 700-12(e) will satisfy the requirement for initial and backup emergency power for

emergency lighting equipment and exit signs, only when connected the very same

branch lighting circuits that serves the general illumination in that room in which the

“unit equipment” fixture is mounted. Cord and plugs are not allowed. Lighting fixtures

with self-contained batteries for automatic emergency back-up are acceptable.

D. All emergency equipment shall be permanently installed (not portable). 1. Receptacles are not allowed on the life safety branch of emergency power circuits,

except as permitted by NEC.

2. Special receptacles for portable generators may be provided for those facilities designated emergency public shelters. Other receptacles may be provided on the

optional standby branch. Coordinate with M-DCPS for number of emergency power

receptacles locations.

E. Emergency generator systems shall be designed to serve two separate branches of power, and a third branch if a fire pump is required. Emergency branches shall be separated by the

following load types:

1. Life safety loads. 2. Fire-pump loads. 3. Optional stand-by loads as indicated in this Division. 4. Provide separate automatic transfer and disconnect switches for each branch type.

F. The exhaust system for emergency generators shall be designed to prevent exhaust fumes from being drawn-back into occupied building areas or to avoid prevailing winds from

disbursing exhaust fumes directly onto exterior areas such as courtyards, covered shelters or

exterior P.E. areas.

G. When optional standby equipment is connected to an emergency system, the optional standby load shall be coordinated with the emergency system over-current protection so that

no short circuit or other malfunction of the optional system will disable any part of the life

safety branch of the emergency system. The life safety system in the building shall have first

priority to the optional power provided.

H. Provide dedicated transfer switches to provide emergency power to the following Life Safety systems:

1. Fire alarm system. 2. Intercom system. 3. Emergency lighting and exit signs. 4. Fire Pumps. 5. Elevator Cab Lights. 6. Public Safety Communication System. 7. Ventilation equipment essential to life.



8. EHPA Life Safety Systems required by Code. (See M-DCPS EHPA Design Criteria for additional requirement).

9. Other Life Safety systems as required by Code.

I. Provide dedicated transfer switches to provide emergency power to the following optional stand-by systems:

1. Elevators. a. At new facilities: All elevators shall be connected to the emergency generator

system. When operating under emergency power, elevators shall operate in a

sequential mode (one elevator at a time).

b. At existing facilities: New elevators shall be connected to the Facility’s emergency generator or ahead of the normal electrical main, when feasible and when

determined by M-DCPS Facilities Design and Standards on a per condition basis.

When operating under emergency power, elevators shall operate in a sequential

mode (one elevator at a time).

2. Security System. 3. Telecommunication Systems. 4. Card Access System. 5. Security Camera Surveillance System. 6. Mechanical equipment and electrical receptacles required for the EHPA. (See EHPA

Design Criteria Manual for additional requirement).

7. EMS Control Panels. 8. Cooler/Freezer and refrigerators located in Food Service areas. 9. School District owned and operated lift station. 10. Repeater equipment for School hand-held radios. 11. One (1) 120V, 20-Amps receptacle in the Clinic for the refrigerator. 12. One (1) 120V, 20-Amps receptacle in each School Police Office(s). 13. One (1) 120V, 20-Amps receptacle in the Media Center. 14. One (1) 120V, 20-Amps receptacle in Principal’s Office. 15. One (1) 120V, 20-Amps receptacle in the Dining room. 16. One (1) 120V, 20-Amps receptacle in the Gymnasium.

NOTE: M-DCPS District Communication Management Center (DCOM) shall be alerted

automatically by way of a dedicated telecommunication line when the above Life Safety

systems transfer to emergency power.

J. Emergency generators for new construction projects shall be powered by natural gas if available and reliable, except as noted below:

1. Consider liquefied petroleum gas (LPG) or compressed natural gas (CNG) stored in on-site tanks, if natural gas service is unreliable or unavailable in the area. Verify reliability

with the gas company serving the site.

2. At non-EHPA school facilities, provide two fuel tanks of equal size, containing enough fuel between them to operate the generator at 100% load capacity for a period of 8

continuous hours. Fuel tanks shall be buried when permitted by Code and AHJ.

3. The use of fuel oil is not accepted by M-DCPS for new construction, except at Facilities classified as an EHPA.

4. See Division 15 of the M-DCPS Design Criteria for additional requirements on fuel tanks.



K. At facilities classified as EHPA, provide an emergency generator to comply with applicable Codes and requirements of M-DCPS - EHPA Design Criteria.

L. Loads on emergency power shall be hard wired and the entire emergency distribution system shall be completely independent and separated from the normal power distribution system.

Electrical panels on the emergency system shall be labeled and painted according to

specifications. Provide surge suppression devices for power distribution equipment as noted

below:

1. Normal and emergency main entrance equipment. 2. All distribution and branch circuit panels for computer loads and electronic lighting and

security camera system.

M. The emergency power shall be supplied by an emergency generator package consisting of an alternator coupled to an internal combustion motor, automatic transfer switch, battery

charger, batteries, day tank, exhaust/muffler (critical grade silencers) and main breaker(s).

N. Installation of emergency generator and fuel supply shall meet requirements of National Electrical Code – Article 700 and NFPA-110, Standard for Emergency and Optional Stand-

by Generator.

O. Total load on the new generator shall not exceed 80% of the generator rated capacity.

P. The intercom, telephone, and facility management systems shall each have dedicated backup power sources to operate the system. These low voltage systems are not part of the general

electrical scope of work of Division 16. See Division 13 of the M-DCPS Design Criteria for

additional details.

Q. Provide emergency lighting, in addition to normal power lighting, in accordance with NFPA-101 and in the following areas:

1. Teacher workrooms and large storage rooms capable of being used by study groups. 2. All rooms with electrical equipment.

R. In facilities without an emergency generator, provide emergency exit lights and emergency LED lighting fixtures with self-contained batteries for automatic backup.

S. Transfer switch loads shall be grouped according to FBC, NEC-700 and 701 for emergency loads and NEC-702 for optional standby equipment:

T. Locate the emergency generator and automatic transfer switches in a dedicated, 2-hour fire rated room with doors opening directly to the outside. Provide generator room with

emergency lighting connected to the generator and a wall pack battery light connected to

room emergency circuit ahead of room lighting switch.

U. Emergency system overcurrent devices shall be selectively coordinated with 0.1 second response time. A/E shall submit a signed and sealed letter to the Building Code Consultant

(BCC) certifying that installed emergency power system is a selectively coordinated system

and meets the requirements of NEC Article 700 and M-DCPS Design Criteria.



V. Spaces with unit equipment emergency lights shall utilize wall pack battery lights connected to local lighting circuit ahead of any switching.

W. Provide battery backup for the fire alarm panel per NFPA-72 requirements.

X. Emergency generator installation shall conform with all applicable Codes and standards, including permits that may be required by agencies having jurisdictions (AHJ) including

DERM.

1.7 FIRE ALARM DETECTION SYSTEM

A. Provide a single stand-alone or multiple panel network type fire alarm system for the entire facility. The system shall be tested and certified by the manufacturer’s certified personnel,

per NFPA 72. Fire alarm system shall be capable of interfacing with the M-DCPS District

Communication Management Center (DCOM) (a.k.a. District Alarms) located at the School

Board Administration Building.

B. At a new facility, all stand-alone buildings shall be connected to a single manufacture’s fire alarm system.

C. At a new addition, the fire alarm serving the new addition shall be connected to the fire alarm system serving the existing facility either by connecting the new devices to the

existing Fire Alarm Control Panel (FACP) or by installing a secondary FACP networked to

the existing FACP. The secondary FACP shall be of the same manufacture as the existing

FACP. The existing FACP shall be evaluated for maintenance costs and obsolescence to see

if replacement is required.

D. Fire alarm systems shall be powered by dedicated circuits from emergency panels according to Florida Building Code (FBC), NFPA 70 and NFPA 72.

E. Design of Fire Alarm System shall comply with: 1. FBC. 2. National Electrical Code, (NFPA 70). 3. National Fire Alarm Code, (NFPA 72). 4. NFPA 90A, 90B, and 96. 5. Underwriters Laboratories (UL) or other OSHA approved Nationally Recognized

Testing Laboratories (NRTL).

6. NFPA 101 - Life Safety Code. 7. Florida Fire Prevention Code.

F. The fire alarm system shall be addressable, wired in dedicated conduits, and electronically supervised.

1. It shall be complete with control, detection, notification, and initiation devices, connected to a control/annunciator panel with command and control function capability.

2. Provide a digital alarm communicator transmitter (DACT) that is listed by an OSHA approved Nationally Recognized Testing Laboratory (NRTL), for fire protective

signaling systems.



G. Provide transient surge/lightning protection to the fire alarm system. Fire alarm systems shall have lightning/surge protection modules installed on the input (power supply) side and on

each of the output circuits/loops including alarm initiating and reporting devices. Surge

/lightning protection modules shall also be installed on the following:

1. All wires that enter and leave the fire alarm control panels and booster panels. 2. All fire alarm wires that enter and leave the buildings. 3. All 120V dedicated power circuits serving the fire alarm control panels and booster

panels.

H. Verify code requirements for upgrading the fire alarm system when adding to, or revising, components of an existing fire alarm system. Provide all new devices compatible with the

existing manufacturer’s fire alarm system.

I. Fire alarm system and fire alarm components shall be listed for commercial use. Fire alarm system and components listed for residential use are not allowed.

J. Fire alarm system shall include, but not be limited to the following: 1. Automatic detection devices, including smoke detectors, heat detectors, etc. 2. Power supplies, including back-up batteries required to meet NFPA 72. These devices

shall be listed by an OSHA approved Nationally Recognized Testing Laboratory.

3. Electronic components including transponders, conventional zone modules, interface modules, and printers.

4. Control Devices: Relays, switches, etc. 5. Zone Map: Professionally plotted in color, minimum 24" x 36", laminated and framed,

using a minimum scale of 1 inch = 20 feet, wall mounted in the vicinity of main fire

alarm control panel and at any other remote annunciator panel location. Zone map(s)

shall clearly and legibly identify all individual devices with addresses and room

numbers, including all NAC panels and end-of-line resistors. An electronic copy of the

Zone Map shall be provided to M-DCPS District Alarms.

6. Pull stations: a. Consider all exceptions permitted by Code to minimize the installation of pull

stations in publicly accessible spaces.

b. Provide a manual pull station next to each administrative intercom telephone called for under Division 13 - “Intercom and Clock/Bell” section of M-DCPS Design

Criteria. These locations are as follows:

1) One (1) in the principal’s office. 2) One (1) in the administration secretarial area adjacent to the fire alarm panel. 3) One (1) at the media center adjacent to the intercom console. 4) If the facility is an Enhanced Hurricane Protected Area (EHPA), provide one

(1) pull station within the EHPA Manager’s Office.

c. Pull stations shall be provided with transparent impact resistant protective covers. d. At new construction, provide recessed pull stations, when allowed by wall

conditions, according to manufacturer’s requirements.

7. Voice Evacuation: Must follow FBC requirements for installation. Voice Evacuation in any new or existing facility shall also meet all NFPA standards.

8. In non-EHPA facilities, locate the main fire alarm panel and area zone map in a visible location of the main administration secretarial area.



9. In EHPA facilities, the main fire alarm control panel shall be located at the designated EHPA Manager’s Office, with a remote annunciator panel located in the main

administration area. Refer to M-DCPS EHPA Design Criteria for additional details.

10. Drill switches are not allowed. 11. Conduit system, including raceways, junction boxes, wiring, and accessories:

a. Wiring shall be distributed throughout the facility in dedicated raceways. 1) Paint box covers orange. 2) Wiring shall comply with NEC 760, NFPA 72 and fire alarm equipment

manufacturer’s wiring requirements and specifications.

3) Wiring shall be power-limited fire protective signal circuit cable or conductors.

b. Fire Alarm Circuit shall be Class B according to NFPA 72. c. Splicing of fire alarm initiation & notification circuit conductors shall only be done

for connection of fire alarm devices or inside wall mounted terminal cabinets on

terminal strips. All circuit conductors shall have wire markers with corresponding

typewritten wiring schedule inside enclosure. Fire alarm circuit initiation &

notification conductors shall not be spliced underground.

d. “T” tapping of addressable data circuits shall only be done when necessary to meet system manufacturer’s maximum impedance requirements. “T” taps shall only be

done inside wall mounted terminal cabinets on terminal strips. All circuit

conductors shall have wire markers with corresponding typewritten wiring

schedule inside enclosure.

e. The input AC power for the fire alarm control panel and DACT shall be from a dedicated branch circuit of the facility emergency backup system. Outside the

enclosure identify the panel and label the breaker with “WARNING – A.C.

POWER TO FIRE ALARM SYSTEM. DO NOT TURN OFF OR

DISCONNECT”.

f. Cable at wet locations shall comply with NEC 760 – Power Limited Standards and manufacturer’s low capacitance requirements.

12. Communications software, hardware, and programming.

K. Where Codes allow smoke detector or heat detector, provide heat detector to minimize false alarms.

1. Provide a wire guard for fire alarm horns/strobes in gym. 2. Heat and smoke detectors shall not be located closer than 3 feet from a supply air or

return air diffuser.

3. The activation of the facility's fire alarm system shall not activate the NFPA 96 exhaust hood fire suppression system; however, the activation of the hood’s system shall

activate the facility’s fire alarm system.

4. Fire alarm system shall comply with the State Fire Marshal Rule 69A-58. 5. Fire alarm shut-down relay(s) shall be located next to the fan controller. 6. When a fire pump is installed at a facility, the fire alarm control panel shall monitor fire

pump fail, fire pump run, and fire pump phase reversal.

7. Provide high temperature heat detector in the emergency generator room and in kiln rooms.

8. All fire alarm devices located in open-air areas exposed to exterior elements shall be weatherproof.

9. Provide integral re-chargeable battery back-up for the fire alarm system.



L. The control-switch for silencing the building horns shall be allowed only if it is key-operated or located in a locked cabinet and if it transfers the alarm indication to a visual indicator and

allows subsequent alarm signals.

M. A general alarm shall activate all horns and visual alarms according to applicable codes. Strobes shall be non-silenceable.

N. Protective Covers: 1. Provide a clear polycarbonate protective cover, that is listed by an OSHA approved

NRTL, on all smoke detectors located below 8′-6" AFF, and all pull stations, horns and horn/strobes, except those located within staff restrooms, teachers’ lounge, and staff

offices located in the administration and student services areas.

2. Heat detectors located in student occupied areas that are un-supervised shall be provide a vandal resistant cover that is listed by a NRTL.

O. Addressable device ID locations shall match actual F.I.S.H. room number.

P. Provide ADAAG strobes, in addition to horns, in areas where a hearing-impaired person may be separated from a normal hearing person, and as may be required by FBC, Chapter II

Accessibility requirements.

Q. Each new fire alarm system shall be installed with at least a 30 percent overall extra device capacity in each SLC circuit loop.

1. Each system shall be expandable, of modular design, and be capable of networking additional devices on multiple communications trunks.

2. Systems shall have capability for the installation of additional boards/modules to provide additional SLC and NAC circuits.

R. Features and Capabilities. 1. The Fire Alarm Control Panel (FACP) or annunciator shall display information

regarding the condition of the system and devices in the alarm mode.

2. In facilities designated as an Enhanced Hurricane Protective Area (EHPA), the main fire alarm panel shall have provisions for one-way voice communication from the

EHPA Manager’s office to all EHPA designated areas in the Building.

3. The FACP or annunciator shall hold in memory the last series of at least 20 detection devices in alarm activation and the sequence order.

4. The FACP shall be capable of disabling a device. 5. Cable and wiring shall be supervised. 6. Remote power supplies shall be listed for fire protective signaling systems with

sufficient backup batteries to meet NFPA 72 requirements and be connected to a

dedicated circuit.

7. The FACP shall immediately indicate the following as panel trouble. a. A disabled device. b. A cable or wiring short, ground, or break in the loop or any other trouble. c. Local or remote dedicated 120V AC or standby DC power failure.

8. The status of any device in the facility shall be available in detail when queried. 9. The “block acknowledge” feature of addressable systems is not allowed and shall be

disabled except for system start-up and maintenance.



10. The system printer shall be interfaced and supervised by the fire alarm panel and print all activity.

S. Sequence of Operation shall comply with all applicable Codes.

T. System shall include recall signal and reset button.

U. A/E shall specify that a completed NFPA 72 - Fire Alarm System Certification form be submitted before inspection, to verify compliance with the following:

1. NFPA 72, chapters, 1, 3, 4, 5, 6, and 7. 2. NFPA 70, National Electrical Code, Article 760. 3. State Fire Marshall – Rule 4A-48. 4. Manufacturer’s instructions.

V. A/E shall specify that any existing fire alarm component being permanently removed as part of the scope of the project shall be properly boxed, labeled and delivered to the M-DCPS

Maintenance and Operations location designated by M-DCPS Project Manager

END OF DIVISION