Gdog
write diagnostic firmware for embedded industrial
Got a 1000 sq ft house that was built before grounding was std (1940s I'm guessing) and according to info I got (via grapevine) if you don't rewire the whole house then just add GFIC to all the outlets to be (relatively) "safe". This has been done.
But a few of the outlets (suspect these were added later but before i bought the house) are actually grounded; someone ran a separate ground wire under the house (on a crawl) and clamped it to the cold water pipe. As far as I knew that was good (can you tell I'm not a pro electrician?).
But last weekend I happened to be in the local technical bookstore with time to kill so I'm looking through the NEC book in the grounding section. I think i read that attaching ground wire to the water pipe is not enough; that you still need a ground rod in addition to the water pipe ground. Is that correct for my situation?
Thanks for your help!
But a few of the outlets (suspect these were added later but before i bought the house) are actually grounded; someone ran a separate ground wire under the house (on a crawl) and clamped it to the cold water pipe. As far as I knew that was good (can you tell I'm not a pro electrician?).
But last weekend I happened to be in the local technical bookstore with time to kill so I'm looking through the NEC book in the grounding section. I think i read that attaching ground wire to the water pipe is not enough; that you still need a ground rod in addition to the water pipe ground. Is that correct for my situation?
Thanks for your help!