Table 2-1. OSHA regulations that apply to all installations, regardless of the time they were designed or installed.

DOE-HDBK-1092-98

According to OSHA, under the Department of Labor (DOL), there are specific rules that apply to all

installations and others that apply retroactively to installations installed after certain dates.

Requirements listed in Table 2-1 are applicable to all electrical installations regardless of the date

that they were designed and installed. All electrical systems and pieces of equipment that were

installed after March 15, 1972, shall comply with all the requirements of 29 CFR 1910.302 through

1910.308, and not just the requirements listed in Table 2-1.

All major replacements, modifications, repairs, or rehabilitation performed after March 15, 1972, on

electrical systems and equipment installed before March 15,1972, are required to comply with all the

requirements of 29 CFR 1910.302 to 1910.308. OSHA considers major replacements, modifications,

or rehabilitation to be work similar to that involved when a new building or facility is built, a new

addition is built, or an entire floor is renovated.

A revision to 29 CFR 1910, Subpart S, was implemented and became effective April 16, 1981, which

contained revised parts of 29 CFR 1910.302 through 1910.308 that apply to electrical systems and

equipment installed after April 1, 1981.

Table 2-1. OSHA regulations that apply to all installations, regardless of the time they were

designed or installed.

29 CFR 1910

1996 NEC

Subject

.303(b)

110-3

Examination, installation, and use of equipment

.303(c)

110-14(b)

Splices

.303(d)

110-18

Arcing parts

.303(e)

110-21

Marking

.303(f)

110-22

Identification of disconnecting means

.303(g)(2)

110-17

Guarding live parts (600 V, nominal or less)

.304(e)(1)(i)

210-20, 240-1,2

Protection of conductors and equipment

310-10

.304(e)(1)(iv)

240-24

Location in or on premises

.304(e)(1)(v)

240-41

Arcing or suddenly moving parts

.304(f)(1)(ii)

250-3

2-wire dc systems to be grounded

.304(f)(1)(iii);(iv)

250-5a,b

AC systems to be grounded

.304(f)(1)(v)

250-5b(4)

AC systems 50 to 1,000 V not required to

be grounded

.304(f)(3)

250-23a

Grounding connections

.304(f)(4)

250-51

Grounding path

.304(f)(5)(iv)(A) thru

250-42a,b,c,d

Fixed equipment required to be grounded

.304(f)(5)(iv)(F)

.304(f)(5)(v)

250-45

Grounding of equipment connected by cord and plug

.304(f)(5)(vi)

250-44

Grounding of nonelectrical equipment

.304(f)(6)(i)

250-58

Methods of grounding fixed equipment

.305(g)(1)(i);(ii)

400-7

Uses of flexible cords and cables

.305(g)(1)(iii)

400-8

Flexible cords and cables prohibited

.305(g)(2)(ii)

400-9

Flexible cord and cable splices

.305(g)(2)(iii)

400-10

Pull at joints and terminals of flexible cords

and cables

2-5