grounding receptacle

grounding receptacle

[′grau̇nd·iŋ ri‚sep·tə·kəl]
(electricity)
A receptacle which has an extra contact that accepts the third round or U-shaped prong of a grounding attachment plug and is connected internally to a supporting strap, providing a ground both through the outlet box and the grounding conductor, armor, or raceway of the wiring system.
Mentioned in ?