Note 1: Examples of increased or additional hazards include interruption of life support equipment, deactivation of emergency alarm systems, shutdown of hazardous location ventilation equipment, or removal of illumination for an area.
Note 2: Examples of work that may be performed on or near energized circuit parts because of infeasibility due to equipment design or operational limitations include testing of electric circuits that can only be performed with the circuit energized and work on circuits that form an integral part of a continuous industrial process in a chemical plant that would otherwise need to be completely shut down in order to permit work on one circuit or piece of equipment.
Note 3: Work on or near deenergized parts is covered by paragraph (b) of this section.
Note 1: As used in this section, fixed equipment refers to equipment fastened in place or connected by permanent wiring methods.
Note 2: Lockout and tagging procedures that comply with paragraphs (c) through (f) of § 1910.147 will also be deemed to comply with paragraph (b)(2) of this section provided that:
Note: The written procedures may be in the form of a copy of paragraph (b) of this section.
Note: If the capacitors or associated equipment are handled in meeting this requirement, they shall be treated as energized.
Note: The work practices used by qualified persons installing insulating devices on overhead power transmission or distribution lines are covered by § 1910.269 of this part, not by §§ 1910.332 through 1910.335 of this part. Under paragraph (c)(2) of this section, unqualified persons are prohibited from performing this type of work.
Note: For voltages normally encountered with overhead power lines, objects which do not have an insulating rating for the voltage involved are considered to be conductive.
Table S-5-Approach Distances for Qualified Employees-Alternating Current
Voltage range (phase to phase) | Minimum approach distance |
300V and less | Avoid contact. |
Over 300V, not over 750V | 1 ft. 0 in. (30.5 cm). |
Over 750V, not over 2kV | l ft. 6 in. (46 cm). |
Over 2kV, not over 15kV | 2 ft. 0 in. (61 cm). |
Over 15kV, not over 37kV | 3 ft. 0 in. (91 cm). |
Over 37kV, not over 87.5kV | 3 ft. 6 in. (107 cm). |
Over 87.5kV, not over 121kV | 4 ft. 0 in. (122 cm). |
Over 121kV, not over 140kV | 4 ft. 6 in. (137 cm). |
29 C.F.R. §1910.333