- Part Number:1910
- Part Number Title:Occupational Safety and Health Standards
- Subpart:1910 Subpart R
- Subpart Title:Special Industries
- Standard Number:
- GPO Source:
The power conductors and equipment are deenergized and grounded.
Table R-2—Approach Distances to Exposed Energized Overhead Power Lines and Parts
|Voltage range (phase to phase, RMS)||Approach distance (inches)|
|300 V and less||(1)|
|Over 300V, not over 750V||12|
|Over 750V not over 2 kV||18|
|Over 2 kV, not over 15 kV||24|
|Over 15 kV, not over 37 kV||36|
|Over 37 kV, not over 87.5 kV||42|
|Over 87.5 kV, not over 121 kV||48|
|Over 121 kV, not over 140 kV||54|
1 Avoid contact.
The employer is responsible for the periodic retesting of all insulating gloves, blankets, and other rubber insulating equipment. This retesting shall be electrical, visual and mechanical. The following maximum retesting intervals shall apply:
|Gloves, blankets, and other insulating equipment||Natural rubber||Synthetic rubber|
Head protection. Head protection meeting the requirements of ANSI Z89.2-1971, "Safety Requirements for Industrial Protective Helmets for Electrical Workers, Class B" shall be provided whenever there is exposure to possible high voltage electrical contact, and the employer shall ensure that the head protection is used by employees. ANSI Z89.2-1971 is incorporated by reference as specified in §1910.6.
Grounding-type outlets are used, with a "grounding" conductor between the outlet grounding terminal and the side of the voltage source that is strapped to the vehicle;
Hand signals to derrick operators shall be those prescribed by ANSI B30.6-1969, "Safety Code for Derricks", which is incorporated by reference as specified in §1910.6.
Dead-end poles, except properly braced or guyed "Y" or "T" cable junction poles,
Radiation in this area may exceed hazard limitations and special precautions are required. Obtain specific instruction before entering.
Where tree work is performed by employees qualified in line-clearance tree trimming and trainees qualified in line-clearance tree trimming, the clearances from energized conductors given in Table R-3 shall apply.
Table R-3—Minimum Working Distances From Energized Conductors for Line-Clearance Tree Trimmers and Line-Clearance Tree-Trimmer Trainees
|Voltage range (phase to phase) (kilovolts)||Minimum working distance|
|2.1 to 15.0||2 ft. 0 in.|
|15.1 to 35.0||2 ft. 4 in.|
|35.1 to 46.0||2 ft. 6 in.|
|46.1 to 72.5||3 ft. 0 in.|
|72.6 to 121.0||3 ft. 4 in.|
|138.0 to 145.0||3 ft. 6 in.|
|161.0 to 169.0||3 ft. 8 in.|
|230.0 to 242.0||5 ft. 0 in.|
|345.0 to 362.0||7 ft. 0 in.|
|500.0 to 552.0||11 ft. 0 in.|
|700.0 to 765.0||15 ft. 0 in.|
Barricade. A physical obstruction such as tapes, cones, or "A" frame type wood and/or metal structure intended to warn and limit access to a work area.
Note: A cable sheath may consist of multiple layers of which one or more is conductive.
Note: When any object is said to be insulated, it is understood to be insulated in suitable manner for the conditions to which it is subjected. Otherwise, it is, within the purpose of these rules, uninsulated. Insulating coverings of conductors in one means of making the conductor insulated.
Ladder platform. A device designed to facilitate working aloft from an extension ladder. A typical device consists of a platform (approximately 9" × 18") hinged to a welded pipe frame. The rear edge of the platform and the bottom cross-member of the frame are equipped with latches to lock the platform to ladder rungs.
Pole balcony or seat. A balcony or seat used as a support for workmen at pole-mounted equipment or terminal boxes. A typical device consists of a bolted assembly of steel details and a wooden platform. Steel braces run from the pole to the underside of the balcony. A guard rail (approximately 30" high) may be provided.
Note: Telecommunication centers are facilities established, equipped and arranged in accordance with engineered plans for the purpose of providing telecommunications service. They may be located on premises owned or leased by the organization providing telecommunication service, or on the premises owned or leased by others. This definition includes switch rooms (whether electromechanical, electronic, or computer controlled), terminal rooms, power rooms, repeater rooms, transmitter and receiver rooms, switchboard operating rooms, cable vaults, and miscellaneous communications equipment rooms. Simulation rooms of telecommunication centers for training or developmental purposes are also included.
[40 FR 13441, Mar. 26, 1975, as amended at 43 FR 49751, Oct. 24, 1978; 47 FR 14706, Apr. 6, 1982; 52 FR 36387, Sept. 28, 1987; 54 FR 24334, June 7, 1989; 61 FR 9227, March 7, 1996; 63 FR 33450, June 18, 1998; 67 FR 67965, Nov. 7, 2002; 69 FR 31882, June 8, 2004; 70 FR 1141, Jan. 5, 2005; 81 83006, Nov. 18, 2016]