Cross reference of OSHA & NFPA · PDF fileCross reference of OSHA & NFPA Standards. This document has been designed to provide a quick cross reference between the OSHA 1910, 1926 and

Cross reference of OSHA & NFPA

Standards

This document has been designed to provide a quick cross reference between the OSHA 1910, 1926 and the NFPA Standards 70

(2011 ed.) & 70E (2012 ed.). It is not intended to replace the use of the individual code books. Both NFPA complete standards would

never fit into a single document, so the primary comparison has been made to OSHA’s 1910 General Industry. To prevent

unnecessary repetition of code numbers, the code section will follow down the column whenever possible. Blank spaces indicate

that no comparable reference was found (by this author).

1 Bob LoMastro 847-566-6766

Sample only, contact Bob (847-566-6766) for ordering info

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Table of Contents [code references]

Topic Page(s)

Coverage & Purpose [1910.301][1926.400][90.2] 3-4

Not covered [1910.301][1926.400][90.2] 5-6

Extent of coverage [1910.302] 7

Approval [1910.303(b)][1926.403(B)][110] 7

Examination (general duty clause) [1910.303(b)][1926.403(B)][110] 8-10

Mounting and cooling of equipment

Electrical connections [1910.303(c)][1926.403(e)][110]

12

13-14

Arcing parts [1910.303(d)][1926.403(f)][110] 15

Marking [1910.303(e)][1926.403(g)][110] 15

Disconnecting means and circuits [1910.303(f)][1926.403(h)][110] 16

600 Volts, nominal, or less [1910.303(g)][1926.403(i)][110] 17-24

Over 600 volts, nominal [1910.303(h)][1926.403(j)][110] 25-33

Use and identification of grounded and grounding conductors

[1910.304(a)][1926.404(a)][200]

34

Branch circuits [1910.304(b)][1926.404(b) & 405][210 & 400] 35-45

GFCI protection {1910.304(b)(3) [1926.404(b)(1)(i)][210.8] 37

Outside conductors, 600 volts, nominal, or less.

[1910.304(c)][1926.404(c)][225]

45-50

Location of outdoor lamps. [1910.304(d)][1926.404(c)][225] 50

Services [1910.304(e)][1926.404(d)][230] 50-52

Overcurrent protection -600 volts, nominal, or less

[1910.304(f)][1926.404(e)][240]

52-57

Grounding [1910.304(g)][1926.404(f)][250] 58-73

Wiring methods [1910.305(a)][1926.405(a)][300, 250 , 398 & 590] 74-84

Cabinets, boxes, and fittings [1910.305(b)][1926.405(b)][314 & 312] 85-88

Switches [1910.305(c)][1926.405(c)][404] 88-90

Switchboards and panelboards [1910.305(d)][1926.405(d)][408] 91

Enclosures for damp or wet locations [1910.305(f)][1926.405(f)][312, 310

& 404]

92-93

Flexible cords and cables [1910.305(g)][1926.405(g)][400] 93-96

Portable cables over 600 volts [1910.305(h)][1926.405(h)][400] 97-98

Fixture wires [1910.305(i)][1926.405(i)][402] 98-99

Equipment for general use [1910.305(i)][1926.405(i)][410, 406, 110, 450,

460 & 480]

99-111

Topic Page(s)

Receptacles, cord connectors, and attachment plugs (caps). [1910.305(j)(2)][1926.404(j)(2)][406.7]

101

Electric signs and outline lighting [1910.306(a)][600] 112-113

Cranes and hoists [1910.306(b)][1926.406(a)][610] 114-116

Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and

stairway chair lifts. [1910.306(c)][1926.406(b)][620]

116-121

Electric welders [1910.306(d)][1926.406(c)][630] 122

Information technology equipment [1910.306(e)][645] 122-123

X-Ray equipment [1910.306(f)][1926.406(d)][660] 124-125

Induction and dielectric heating equipment [1910.306(g)][665] 125-129

Electrolytic cells [1910.306(h)][668] 129-134

Electrically driven or controlled irrigation machines [1910.306(i)][675] 134-135

Swimming pools, fountains, and similar installations. [1910.306(j)][680] 135-139

Carnivals, circuses, fairs, and similar events [1910.306(k)][525] 139-146

Hazardous (Classified) Locations [1910.307][1926.407[500 & 505,] 147-161

Special systems over 600 volts [1910.308][1926.408[490,300,490,700 &

110]

162-180

2

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OSHA 1910 OSHA 1926 NEC (NFPA 70) NFPA 70E

1910.301(a)

Design safety standards for electrical systems. These regulations are contained in 1910.302 through 1910.330. Sections 1910.302 through 1910.308 contain design safety standards for electric utilization systems. Included in this category are all electric equipment and installations used to provide electric power and light for employee workplaces. Sections 1910.309 through 1910.330 are reserved for possible future design safety standards for other electrical systems.

1926.400(a)

Installation safety requirements. Installation safety requirements are contained in 1926.402 through 1926.408. Included in this category are electric equipment and installations used to provide electric power and light on jobsites.

90.2 Scope

(A) Covered. This Code covers the installation of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables and raceways for the following:

(1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings

(2) Yards, lots, parking lots, carnivals, and industrial substations

(3) Installations of conductors and equipment that connect to the supply of electricity

(4) Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops, and recreational buildings, that are not an integral part of a generating plant, substation, or control center.

90.2 Scope

(A) Covered. This standard addresses electrical safety-related work practices for employee workplaces that are necessary for the practical safeguarding of employees relative to the hazards associated with electrical energy during activities such as the installation, inspection, operation, maintenance, and demolition of electric conductors, electric equipment, signaling and communications conductors and equipment, and raceways. This standard also includes safe work practices for employees performing other work activities that can expose them to electrical hazards as well as safe work practices for the following:

1910.301(b) Safety-related work practices.

These regulations will be contained in

1910.331 through 1910.360.

1910.301(c)

Safety-related maintenance

requirements. These regulations will

be contained in 1910.361 through

1910.380.

1926.400(c)

Safety-related maintenance and

environmental considerations.

Safety-related maintenance and

environmental considerations are

contained in 1926.431 and 1926.432.

90.1 Purpose.

(A) Practical Safeguarding. The

purpose of this Code is the practical

safeguarding of persons and property

from hazards arising from the use of

electricity.

90.1 Purpose.

The purpose of this standard is to provide a practical safe working area for employees relative to the hazards arising from the use of electricity.

90.3 Standard Arrangement

Chapter 2 applies to safety-related

maintenance requirements for

electrical equipment and installations

in workplaces.

3

Author’s note: OSHA & NFPA Electrical Safe Work Practices will be created as a separate document


OSHA 1910 OSHA 1926 NEC (NFPA 70) NFPA 70E 1910.301(d)

Safety requirements for special

equipment. These regulations will be

contained in 1910.381 through

1910.398.

1926.400(d)

Safety requirements for special

equipment. Safety requirements for

special equipment are contained in

1926.441.

Chapters 5, 6, and 7

apply to special occupancies,

special equipment, or other special

conditions.

Chapter 3

Supplements or modifies Chapter 1

with safety requirements for

special equipment.

1910.301(e)

Definitions. Definitions applicable to each

division are contained in 1910.399.

1926.400(e)

Definitions. Definitions applicable to this

Subpart are contained in 1926.449.

Article 100 Definitions

Part I of this article contains definitions

intended to apply wherever the terms are

used throughout this Code. Part II contains

definitions applicable only to the parts of

articles specifically covering installations and

equipment operating at over 600 volts,

nominal.

Article 100

Provides definitions of terms that, in general,

are used in multiple articles of the standard.

Common terms that are defined in English

language dictionaries are not normally

defined in Article 100.

1910.302(a)

Sections 1910.302 through 1910.308

contain design safety standards for

electric utilization systems.

1910.302(a)(1)

Covered. The provisions of §§ 1910.302

through 1910.308 cover electrical

installations and utilization equipment

installed or used within or on buildings,

structures, and other premises,

including:

1910.302(a)(1)(i)

Yards;

1910.302(a)(1)(ii)

Carnivals;

1910.302(a)(1)(iii)

Parking and other lots;

1910.302(a)(1)(iv)

Mobile homes;

1910.302(a)(1)(v)

Recreational vehicles;

1910.302(a)(1)(vi)

Industrial substations;

1910.302(a)(1)(vii)

Conductors that connect the installations to a

supply of electricity; and

1910.302(a)(1)(viii)

Other outside conductors on the premises.

1926.402(a)

Covered. Sections 1926.402 through

1926.408 contain installation safety

requirements for electrical equipment

and installations used to provide electric

power and light at the jobsite. These

sections apply to installations, both

temporary and permanent, used on the

jobsite; but these sections do not apply

to existing permanent installations that

were in place before the construction

activity commenced.

NOTE: If the electrical installation is

made in accordance with the National

Electrical Code ANSI/NFPA 70-1984,

exclusive of Formal Interpretations and

Tentative Interim Amendments, it will be

deemed to be in compliance with

1926.403 through 1926.408, except for

1926.404(b)(1) and

1926.405(a)(2)(ii)(E), (F), (G), and (J).

90.2 Scope.

(A) Covered. This Code covers the

installation of electrical conductors,

equipment, and raceways; signaling and

communications conductors, equipment,

and raceways; and optical fiber cables

and raceways for the following:

(1) Public and private premises,

including buildings, structures, mobile

homes, recreational vehicles, and

floating buildings

(2) Yards, lots, parking lots, carnivals,

and industrial substations

(3) Installations of conductors and

equipment that connect to the supply of

electricity

(4) Installations used by the electric

utility, such as office buildings,

warehouses, garages, machine shops,

and recreational buildings, that are not

an integral part of a generating plant,

substation, or control center.

90.2 Scope.

(A) Covered. This standard addresses

electrical safety-related work practices

for employee workplaces that are

necessary for the practical safeguarding

of employees relative to the hazards

associated with electrical energy during

activities such as the installation,

inspection, operation, maintenance, and

demolition of electric conductors, electric

equipment, signaling and

communications conductors and

equipment, and raceways. This standard

also includes safe work practices for

employees performing other work

activities that can expose them to

electrical hazards as well as safe work

practices for the following:

(1) Installation of conductors and equipment

that connect to the supply of electricity

(2) Installations used by the electric utility,

such as office buildings, warehouses,

garages, machine shops, and recreational

buildings that are not an integral part of a

generating plant, substation, or control

center.

4

Author’s note: The definitions used in the code are critical to understanding and complying with the standards. Many terms are used differently in the code than everyday uses. When in doubt, look it up!


OSHA 1910 OSHA 1926 NEC (NFPA 70) NFPA 70E 1910.302(a)(2)

Not covered. The provisions of §§

1910.302 through 1910.308 do not

cover:

1910.302(a)(2)(i)

Installations in ships, watercraft, railway

rolling stock, aircraft, or automotive

vehicles other than mobile homes and

recreational vehicles;

1910.302(a)(2)(ii)

Installations underground in mines;

1910.302(a)(2)(iii)

Installations of railways for generation,

transformation, transmission, or

distribution of power used exclusively for

operation of rolling stock or installations

used exclusively for signaling and

communication purposes;

1910.302(a)(2)(iv)

Installations of communication

equipment under the exclusive control of

communication utilities, located outdoors

or in building spaces used exclusively for

such installations; or.

1910.302(a)(2)(v)

Installations under the exclusive control

of electric utilities for the purpose of

communication or metering; or for the

generation, control, transformation,

transmission, and distribution of electric

energy located in buildings used

exclusively by utilities for such purposes

or located outdoors on property owned

or leased by the utility or on public

highways, streets, roads, etc., or

outdoors by established rights on private

property.

1926.402(b)

Not covered. Sections 1926.402

through 1926.408 do not cover

installations used for the generation,

transmission, and distribution of electric

energy, including related communication,

metering, control, and transformation

installations. (However, these regulations

do cover portable and vehicle-mounted

generators used to provide power for

equipment used at the jobsite.) See

Subpart V of this Part for the

construction of power distribution and

transmission lines.

90.2 Scope

(B) Not Covered. This Code does not

cover the following:

(1) Installations in ships, watercraft

other than floating buildings, railway



recreational vehicles

Informational Note: Although the scope

of this Code indicates that the Code does

not cover installations in ships, portions

of this Code are incorporated by

reference into Title 46, Code of Federal

Regulations, Parts 110–113.

(2) Installations underground in mines

and self-propelled mobile surface mining

machinery and its attendant electrical

trailing cable

(3) Installations of railways for

generation, transformation, transmission,

or distribution of power used exclusively

for operation of rolling stock or

installations used exclusively for signaling

and communications purposes

(4) Installations of communications


communications utilities located outdoors


such installations

(5) Installations under the exclusive

control of an electric utility where such

installations

a. Consist of service drops or service

laterals, and associated metering, or

b. Are on property owned or leased by

the electric utility for the purpose of

communications, metering, generation,

control, transformation, transmission, or

distribution of electric energy, or

90.2 Scope

(B) Not Covered. This standard does

not cover safety-related work practices

for the following:

(1) Installations in ships, watercraft

other than floating buildings, railway



recreational vehicles

(2) Installations underground in mines

and self-propelled mobile surface mining

machinery and its attendant electrical

trailing cable

(3) Installations of railways for

generation, transformation, transmission,

or distribution of power used exclusively

for operation of rolling stock or

installations used exclusively for signaling

and communications purposes

(4) Installations of communications


communications utilities located outdoors


such installations

(5) Installations under the exclusive

control of an electric utility where such

installations:

a. Consist of service drops or service

laterals, and associated metering, or

b. Are located in legally established

easements or rights-of-way designated

by or recognized by public service

commissions, utility commissions, or

other regulatory agencies having

jurisdiction for such installations, or

c. Are on property owned or leased by

the electric utility for the purpose of

communications, metering, generation,

5

Carnivals


OSHA 1910 OSHA 1926 NEC (NFPA 70) NFPA 70E

c. Are located in legally established easements or rights-of-way, or d. Are located by other written agreements either designated by or recognized by public service commissions, utility commissions, or other regulatory agencies having jurisdiction for such installations. These written agreements shall be limited to installations for the purpose of communications, metering, generation, control, transformation, transmission, or distribution of electric energy where legally established easements or rights-of-way cannot be obtained. These installations shall be limited to federal lands, native American reservations through the U.S. Department of the Interior Bureau of Indian Affairs, military bases, lands controlled by port authorities and state agencies and departments, and lands owned by railroads.

control, transformation, transmission, or distribution of electric energy, or

d. Are located by other written agreements either designated by or recognized by public service commissions, utility commission, or other regulatory agencies having jurisdiction for such installations. These written agreements shall be limited to installations for the purpose of communications, metering, generation, control, transformation, transmission, or distribution of electric energy where legally established easements or rights-of-way cannot be obtained. These installations shall be limited to federal lands, Native American reservations through the U.S. Department of the Interior Bureau of Indian Affairs, military bases, lands controlled by port authorities and state agencies and departments, and lands owned by railroads.

Author’s Note: Exclusions are normally due to coverage by other regulations or agencies responsible for the type of activity involved. When there is a

conflict between the regulations, it is recommended that you inquire directly to the agencies involved for a formal determination.

6 Power transmission Railways Communications


OSHA 1910 OSHA 1926 NEC (NFPA 70)

1910.302(b)

Extent of application --

1910.302(b)(1)

Requirements applicable to all installations.

The following requirements apply to all electrical

installations and utilization equipment, regardless of

when they were designed or installed:

1910.302(c)

Applicability of requirements for

disconnecting means. The requirement in §

1910.147(c)(2)(iii) that energy isolating devices be

capable of accepting a lockout device whenever

replacement or major repair, renovation or

modification of a machine or equipment is

performed, and whenever new machines or

equipment are installed after January 2, 1990,

applies in addition to any requirements in §

1910.303 through § 1910.308 that disconnecting

means be capable of being locked in the open

position under certain conditions.

1910.303(a)

Approval. The conductors and equipment required

or permitted by this subpart shall be acceptable

only if approved, as defined in Sec. 1910.399.

1926.403(a) Approval. All electrical conductors and equipment shall be approved.

110.2 Approval. The conductors and equipment required or permitted by this Code shall be acceptable only if approved. Informational Note: See 90.7, Examination of Equipment for Safety, and 110.3, Examination, Identification, Installation, and Use of Equipment. See definitions of Approved, Identified, Labeled, and Listed.

7



1910.303(b)

Examination, installation, and use

of equipment --

1926.403(b)

Examination, installation, and use

of equipment -

110.3

Examination, Identification,

Installation, and Use of Equipment

1910.303(b)(1)

Examination. Electric equipment shall

be free from recognized hazards that

are likely to cause death or serious

physical harm to employees. Safety of

equipment shall be determined using

the following considerations:

1926.403(b)(1)

Examination. The employer shall

ensure that electrical equipment is free

from recognized hazards that are likely

to cause death or serious physical harm

to employees. Safety of equipment

shall be determined on the basis of the

following considerations:

(A) Examination. In judging

equipment, considerations such as the

following shall be evaluated:

1910.303(b)(1)(i)

Suitability for installation and use in

conformity with the provisions of this

subpart;

Note to paragraph (b)(1)(i) of this

section: Suitability of equipment for an

identified purpose may be evidenced by

listing or labeling for that identified

purpose.

1926.403(b)(1)(i)

Suitability for installation and use in

conformity with the provisions of this

subpart. Suitability of equipment for an

identified purpose may be evidenced by

listing, labeling, or certification for that

identified purpose.

(1) Suitability for installation and use

in conformity with the provisions

of this Code

1910.303(b)(1)(ii)

Mechanical strength and durability,

including, for parts designed to enclose

and protect other equipment, the

adequacy of the protection thus

provided;

1926.403(b)(1)(ii)

Mechanical strength and durability,




provided.

(2) Mechanical strength and durability,




provided

1910.303(b)(1)(iii)

Wire-bending and connection space;

(3) Wire-bending and connection space

1910.303(b)(1)(iv)

Electrical insulation;

1926.403(b)(1)(iii)

Electrical insulation.

(4) Electrical insulation

1910.303(b)(1)(v)

Heating effects under all conditions of

use;

1926.403(b)(1)(iv)

Heating effects under conditions of use.

(5) Heating effects under normal

conditions of use and also under

abnormal conditions likely to arise in

service 8



1910.303(b)(1)(vi)

Arcing effects;

1926.403(b)(1)(v)

Arcing effects.

(6) Arcing effects

1910.303(b)(1)(vii)

Classification by type, size, voltage,

current capacity, and specific use; and

1926.403(b)(1)(vi)

Classification by type, size, voltage,

current capacity, specific use.

(7) Classification by type, size, voltage,

current capacity, and specific use

1910.303(b)(1)(viii)

Other factors that contribute to the

practical safeguarding of persons using

or likely to come in contact with the

equipment.

1926.403(b)(1)(vii)

Other factors which contribute to the

practical safeguarding of employees

using or likely to come in contact with

the equipment.

(8) Other factors that contribute to the

practical safeguarding of persons using

or likely to come in contact with the

equipment

1910.303(b)(3)

Insulation integrity.

Completed wiring installations shall be

free from short circuits and from

grounds other than those required or

permitted by this subpart.

110.7

Wiring Integrity. Completed wiring

installations shall be free from short

circuits, ground faults, or any

connections to ground other than as

required or permitted elsewhere in this

Code.

1910.303(b)(4)

Interrupting rating. Equipment

intended to interrupt current at fault

levels shall have an interrupting rating

sufficient for the nominal circuit

voltage and the current that is

available at the line terminals of the

equipment. Equipment intended to

interrupt current at other than fault


at nominal circuit voltage sufficient for

the current that must be interrupted.

1926.403(c)

Interrupting rating. Equipment

intended to break current shall have

an interrupting rating at system

voltage sufficient for the current that

must be interrupted.

110.9

Interrupting Rating. Equipment

intended to interrupt current at fault


not less than the nominal circuit

voltage and the current that is

available at the line terminals of the

equipment.

Equipment intended to interrupt

current at other than fault levels shall

have an interrupting rating at nominal

circuit voltage not less than the current

that must be interrupted.

9

The interrupting rating of the main over current device only applies to the device itself

The branch circuit overcurrent device must have an interrupting rating sufficient for the equipment.



1910.303(b)(5)

Circuit impedance and other

characteristics. The overcurrent

protective devices, the total impedance,

the component short-circuit current

ratings, and other characteristics of the

circuit to be protected shall be selected

and coordinated to permit the circuit

protective devices used to clear a fault to

do so without the occurrence of extensive

damage to the electrical components of

the circuit. This fault shall be assumed to

be either between two or more of the

circuit conductors, or between any circuit

conductor and the grounding conductor or

enclosing metal raceway.

110.10

Circuit Impedance, Short-Circuit

Current Ratings, and Other

Characteristics. The overcurrent

protective devices, the total impedance,

the equipment short-circuit current

ratings, and other characteristics of the

circuit to be protected shall be selected

and coordinated to permit the circuit

protective devices used to clear a fault

to do so without extensive damage to

the electrical equipment of the circuit.

This fault shall be assumed to be either

between two or more of the circuit

conductors or between any circuit

conductor and the equipment

grounding conductor(s) permitted in

250.118. Listed equipment applied in

accordance with their listing shall be

considered to meet the requirements of

this section.

1910.303(b)(6)

Deteriorating agents. Unless identified

for use in the operating environment, no

conductors or equipment shall be located

in damp or wet locations; where exposed

to gases, fumes, vapors, liquids, or other

agents that have a deteriorating effect on

the conductors or equipment; or where

exposed to excessive temperatures.

1926.432(a) Deteriorating agents -1926.432(a)(1)Unless identified for use in the operating environment, no conductors or equipment shall be located: 1926.432(a)(1)(i) In damp or wet locations; 1926.432(a)(1)(ii) Where exposed to gases, fumes, vapors, liquids, or other agents having a deteriorating effect on the conductors or equipment; or 1926.432(a)(1)(iii) Where exposed to excessive temperatures

110.11 Deteriorating Agents

Unless identified for use in the

operating environment, no conductors

or equipment shall be located in damp

or wet locations; where exposed to

gases, fumes, vapors, liquids, or other

agents that have a deteriorating effect

on the conductors or equipment; or

where exposed to excessive

temperatures.

Informational Note No. 1: See 300.6

for protection against corrosion.

Informational Note No. 2: Some

cleaning and lubricating compounds

can cause severe deterioration of many

plastic materials used for insulating and

structural applications in equipment. 10

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Cross reference of OSHA & NFPA · PDF fileCross reference of OSHA & NFPA Standards. This document has been designed to provide a quick cross reference between the OSHA 1910, 1926 and