Part Number: 1910
Part Title: Occupational Safety and Health Standards
Subpart: S
Subpart Title: Electrical
Standard Number: 1910.302
Title: Electric utilization systems.
GPO Source: e-CFR


Sections 1910.302 through 1910.308 contain design safety standards for electric utilization systems. 1910.302(a)
Scope --
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.
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.
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:

1910.303(b) -- Examination, installation, and use of equipment
1910.303(c)(3) -- Electrical connections -- Splices
1910.303(d) -- Arcing parts
1910.303(e) -- Marking
1910.303(f), except (f)(4) and (f)(5) -- Disconnecting means and circuits
1910.303(g)(2) -- 600 volts or less -- Guarding of live parts
1910.304(a)(3) -- Use of grounding terminals and devices
1910.304(f)(1)(i), (f)(1)(iv), and (f)(1)(v) -- Overcurrent protection -- 600 volts, nominal, or less
1910.304(g)(1)(ii), (g)(1)(iii), (g)(1)(iv), and (g)(1)(v) -- Grounding -- Systems to be grounded
1910.304(g)(4) -- Grounding -- Grounding connections
1910.304(g)(5) -- Grounding -- Grounding path
1910.304(g)(6)(iv)(A) through (g)(6)(iv)(D), and (g)(6)(vi) -- Grounding -- Supports, enclosures, and equipment to be grounded
1910.304(g)(7) -- Grounding -- Nonelectrical equipment
1910.304(g)(8)(i) -- Grounding -- Methods of grounding fixed equipment
1910.305(g)(1) -- Flexible cords and cables--Use of flexible cords and cables
1910.305(g)(2)(ii) and (g)(2)(iii) -- Flexible cords and cables -- Identification, splices, and terminations
1910.307, except as specified in 1910.307(b) -- Hazardous (classified) locations
1910.302(b)(2)
Requirements applicable to installations made after March 15, 1972. Every electrical installation and all utilization equipment installed or overhauled after March 15, 1972, shall comply with the provisions of 1910.302 through 1910.308, except as noted in paragraphs (b)(3) and (b)(4) of this section.
1910.302(b)(3)
Requirements applicable only to installations made after April 16, 1981. The following requirements apply only to electrical installations and utilization equipment installed after April 16, 1981:

1910.303(h)(4) -- Over 600 volts, nominal -- Entrance and access to work space
1910.304(f)(1)(vii) and (f)(1)(viii) -- Overcurrent protection -- 600 volts, nominal, or less
1910.304(g)(9)(i) -- Grounding -- Grounding of systems and circuits of 1000 volts and over (high voltage)
1910.305(j)(6)(ii)(D) -- Equipment for general use -- Capacitors
1910.306(c)(9) -- Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts -- Interconnection between multicar controllers
1910.306(i) -- Electrically driven or controlled irrigation machines
1910.306(j)(5) -- Swimming pools, fountains, and similar installations -- Fountains
1910.308(a)(1)(ii) -- Systems over 600 volts, nominal -- Aboveground wiring methods
1910.308(c)(2) -- Class 1, Class 2, and Class 3 remote control, signaling, and power-limited circuits -- Marking
1910.308(d) -- Fire alarm systems
1910.302(b)(4)
Requirements applicable only to installations made after August 13, 2007. The following requirements apply only to electrical installations and utilization equipment installed after August 13, 2007:

1910.303(f)(4) -- Disconnecting means and circuits -- Capable of accepting a lock
1910.303(f)(5) -- Disconnecting means and circuits -- Marking for series combination ratings
1910.303(g)(1)(iv) and (g)(1)(vii) -- 600 Volts, nominal, or less -- Space about electric equipment
1910.303(h)(5)(vi) -- Over 600 volts, nominal -- Working space and guarding
1910.304(b)(1) -- Branch circuits -- Identification of multiwire branch circuits
1910.304(b)(3)(i) -- Branch circuits -- Ground-fault circuit interrupter protection for personnel
1910.304(f)(2)(i)(A), (f)(2)(i)(B) (but not the introductory text to 1910.304(f)(2)(i)), and (f)(2)(iv)(A) -- Overcurrent protection -- Feeders and branch circuits over 600 volts, nominal
1910.305(c)(3)(ii) -- Switches -- Connection of switches
1910.305(c)(5) -- Switches -- Grounding
1910.306(a)(1)(ii) -- Electric signs and outline lighting -- Disconnecting means
1910.306(c)(4) -- Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts -- Operation
1910.306(c)(5) -- Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts -- Location
1910.306(c)(6) -- Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts -- Identification and signs
1910.306(c)(7) -- Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts -- Single-car and multicar installations
1910.306(j)(1)(iii) -- Swimming pools, fountains, and similar installations -- Receptacles
1910.306(k) -- Carnivals, circuses, fairs, and similar events
1910.308(a)(5)(v) and (a)(5)(vi)(B) -- Systems over 600 volts, nominal -- Interrupting and isolating devices
1910.308(a)(7)(vi) -- Systems over 600 volts, nominal -- Tunnel installations
1910.308(b)(3) -- Emergency power systems -- Signs
1910.308(c)(3) -- Class 1, Class 2, and Class 3 remote control, signaling, and power-limited circuits -- Separation from conductors of other circuits
1910.308(f) -- Solar photovoltaic systems
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.

[46 FR 4056, Jan. 16, 1981; 46 FR 40185, Aug. 7, 1981; 72 FR 7190, Feb. 14, 2007]