The use of a water pipe as a grounding electrode was outlawed by the IEE here as far back as the 1966 edition due to the increasing use of plastic pipes and couplings. Even the 1955 notes state that caution should be used and to check.
(GFI's)They are designed to trip (shut off) as little as 240 milliamps of voltage in 0.025 seconds.
That number (240ma) is way high! (60 times!)
On the subject of the DIY avice: One of my peeves is that too many people tend to over-simplify things to the point where just about anyone thinks that they can do anything without a second thought. I'm sure that it causes many a dangerous situation.
[This message has been edited by Bill Addiss (edited 09-29-2001).]
Originally posted by Dspark: Yes, but my point is that the current needs to get to the EGC, into the service panel, and onto the GC back to the xfrmr. Getting to the earth outside the window is not what grounding is all about.
Ah... Our different grounding systems again! I guess if the pipe used to ground a receptacle was properly bonded to the N-G busbar it would be OK, but it seems kind of tacky. And someone might come along later and cut out part of that pipe and insert a plastic coupling.
Ya do th'hokey-pokey and ya turn yerself aroun'... "Hokey-cokey" here, for anyone who's remotely interested!
Bill: I see these over-simplified explanations here regularly. I'm always saying to myself, "Ah, yes, but..."