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Before contacting the high voltage side of deenergized transformer(s), or conductor(s) connected thereto, all possible sources of backfeed shall be eliminated by:
(a) disconnecting or grounding the high voltage side, or
(b) disconnecting or short circuiting the low voltage side.
EXCEPTION: System(s) worked as energized.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. New section filed 2-22-88; operative 3-23-88 (Register 88, No. 9).
2. Editorial correction of first paragraph (Register 95, No. 32).