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ELECTRICAL WORK PRACTICES |
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Selection and Use of Work Practices - Exposed Energized Parts |
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| If work is to be performed near overhead lines, the lines shall be
de-energized and grounded, unless other protective measures are provided before work is
started. If the lines are to be de-energized, arrangements to de-energize and ground the
lines shall be made with the operator or controller of the electric circuits involved. If
protective measures such as guarding, isolating, or insulating are provided, these
precautions shall prevent employees from contacting lines directly with any body part or
conductive materials, tools, or equipment. The closest an unqualified person may come to an unguarded, energized overhead line is 10 feet plus 4 inches for every 10 kV over 50 kV. This rule also applies to any conductive material with which he or she is in contact. The closest a qualified person and the longest conductive material he or she possesses may come to an unguarded, energized overhead line is designated in Table S-5 of 1910.333(c)(3)(ii), unless certain insulation requirements are met. The closest any part of a vehicle or mechanical equipment that is capable of being elevated may come to an unguarded, energized overhead line is 10 feet plus 4 inches for every 10 kV over 50 kV. However, the standard outlines situations where the clearance can be reduced for elevated equipment. |
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