U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 30Chapter IPart 77Subpart F - Subpart F—Electrical Equipment—General
§ 77.500 - Electric power circuits and electric equipment; deenergization.
§ 77.501 - Electric distribution circuits and equipment; repair.
§ 77.501-1 - Qualified person.
§ 77.502 - Electric equipment; examination, testing, and maintenance.
§ 77.502-1 - Qualified person.
§ 77.502-2 - Electric equipment; frequency of examination and testing.
§ 77.503 - Electric conductors; capacity and insulation.
§ 77.503-1 - Electric conductors.
§ 77.504 - Electrical connections or splices; suitability.
§ 77.505 - Cable fittings; suitability.
§ 77.506 - Electric equipment and circuits; overload and short-circuit protection.
§ 77.506-1 - Electric equipment and circuits; overload and short circuit protection; minimum requirements.
§ 77.507 - Electric equipment; switches.
§ 77.508 - Lightning arresters, ungrounded and exposed power conductors and telephone wires.
§ 77.508-1 - Lightning arresters; wires entering buildings.
§ 77.509 - Transformers; installation and guarding.
§ 77.510 - Resistors; location and guarding.
§ 77.511 - Danger signs at electrical installations.
§ 77.512 - Inspection and cover plates.
§ 77.513 - Insulating mats at power switches.
§ 77.514 - Switchboards; passageways and clearance.
§ 77.515 - Bare signal or control wires; voltage.
§ 77.516 - Electric wiring and equipment; installation and maintenance.
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