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smoke wrote:
Surge suppressors that use the AC wall outlet for ground are essentially useless against nearby lightning strikes since the distance and relatively small diameter wire conductor (16/18ga) to the main power panel earth ground rod looks like infinite resistance to a large current surge. Relatively smaller spikes on the AC line caused by appliance motors etc... can be shunted, but not a huge current induced by a nearby lightning strike. There is much good technical information at Polyphasor's web site which will keep you busy with your research for some time. ---------------------- They can and do offer protection to the devices pluged into that outlet, if said device doens't have any other connection. By clamping the differential volatage they can really help. Not a cure all, but one more tool. Terry |
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