> That's tradition, and common practice, but there is nothing in > NEC to discourage additional earth connections to the ground > (the green wire).
Supplemental electrode grounding is allowed under NEC Article 250.54. One exception to multiple ground points on a circuit is the use of an isolated ground (IG) where a receptacle's dedicated ground lead is brought back directly to an upstream ground point (typically the serving main or sub panel) and does not come in electrical contact with conduit or other premise ground wiring between the receptacle and the isolated ground point. Unlike standard receptacles, IG outlets break the continuity between the receptacle's ground screw and the metallic mounting yoke. But, IG circuits are often more trouble than they're worth since the isolated ground used to protect sensitive equipment is often undermined by alternate grounding paths from other grounded sources through inter-connected cabling. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
