On 07/11/06 04:18 am Michael Tope wrote:
> And just to put it all in perspective, consider how all the utililties
> entering your house are grounded. Is it an array of ground rods
> bussed together 00 cooper and Cadwelded connections? No, its a
> single 8ft ground rod with a compression clamp. And that's the
> electrical utility ground. Look at the CATV ground. It's a puny little
> ground block with a #12 AWG wire clamped through a #10 screw
> (if your lucky). Same for the telephone ground.
But if your munisipality requires *you* to comply with the NEC, and if
your insurance co. won't pay out if your house burns down because they
allege that *you* did not follow the NEC, it may not do you much good to
point out that the power co., cable TV installer, etc. didn't follow the
NEC.
IAC, the NEC is constantly being updated (new editions every three
years), so 40 years ago the power co. wasn't bound by today's NEC;
that's assuming that the power companies are bound by the NEC at all.
BTW, ISTR that compression clamps are permitted by the NEC, but they
have to be checked for tightness every year.
73
Alan NV8A
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