§ 77.701. Grounding metallic frames, casings, and other enclosures of electric equipment.
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/us/cfr/t30/s§ 77.701·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Metallic frames, casings, and other enclosures of electric equipment that can become "alive" through failure of insulation or by contact with energized parts shall be grounded by methods approved by an authorized representative of the Secretary.