                                 CODE OF VIRGINIA

 GROUNDING (§ 45.2-809)

A. Every metallic sheath, armor, or conduit that encloses a power conductor
shall be electrically continuous throughout and shall be grounded effectively.

B. Every metallic frame, casing, or other enclosure of stationary electrical
equipment that can become electrified through failure of insulation or by
contact with energized parts shall be grounded effectively, or equivalent
protection shall be provided.

C. Any three-phase alternating current circuit that is used underground shall
contain either a direct or derived neutral that shall be grounded through a
suitable resistor at the power center. A grounding circuit that originates at
the grounded side of the grounding resistor shall extend with the power
conductors and serve as the grounding conductor for the frame of every piece of
electrical equipment that is supplied with power from that circuit. A grounding
resistor that is manufactured to meet the extended time rating as set forth in
American National standard IEEE C57.32-2015 is deemed to meet the requirements
of this section. High-voltage circuits extending underground shall be supplied
with a grounding resistor of a proper Ohmic value located on the surface to
limit the voltage drop in the grounding circuit external to the resistor to not
more than 100 volts under fault conditions. Such grounding resistor shall be
rated for maximum fault current continuously and insulated from ground for a
voltage equal to the phase-to-phase voltage of the system. Every
resistance-grounded alternating circuit used underground shall include a
fail-safe ground check circuit to monitor continuously the grounding circuit to
ensure the continuity of the ground conductor.

HISTORY: 1966, c. 594, § 45.1-79; 1994, c. 28, § 45.1-161.188; 1999, c. 256;
2011, cc. 826, 862; 2021, Sp. Sess. I, c. 387.