45.1-161.281 - Grounding. - Virginia Statutes

§ 45.1-161.281. Grounding.

A. All metallic sheaths, armors, and conduits enclosing power conductorsshall be electrically continuous throughout and shall be grounded effectively.

B. Metallic frames, casing, and other enclosures of stationary electricequipment that can become "alive" through failure of insulation or bycontact with energized parts shall be grounded effectively or equivalentprotection shall be provided.

C. When electric equipment is operated from three-phase alternating currentcircuits originating in transformers connected to provide a neutral point, acontinuous grounding conductor of adequate size shall be installed andconnected to the neutral point and to the frames of the power-utilizingequipment. Such grounding conductors shall be grounded at the neutral pointand at intervals along the conductor if feasible. A suitable circuit breakeror switching device shall be provided having a ground-trip coil connected inseries with the grounding conductor to provide effective ground-faulttripping.

(1966, c. 594, § 45.1-79; 1994, c. 28.)