Friendly counterpoint

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Posted by cdb on September 28, 2008 at 13:47:13

In Reply to: RE: Should I re-ground? posted by Slick on September 28, 2008 at 11:43:06:

Slick: Nicely written, with the emphasis on 'qualified electrician' and of course, 'safety'.

>>"One main grounding means is required along with one (not two) supplemental grounding electrodes."<< Disagree:
250.50 "...one or more..." Only in the case of selecting Metal Underground Water Pipe (250.52(A)(1)) is a supplemental electrode required (250.53(D)(2)).

>>This is the only case where two ground rods are (Nationally) required.<<
I see no NEC requirement for specifically (2) rod electrodes for any situation.

The final count and type of rod, pipe, or plate grounding electrodes is dictated by (250.56), 25 ohms max; (a number I find a bit high).

The key word in the NEC is "minimum". I'm never really comfortable with Code-'minimum' anything...

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Follow Ups Full Thread

Topic - Should I re-ground? - RickeyM 09:46:50 09/26/08 (19)

RE: Should I re-ground? - jea48 22:04:19 09/26/08 (13)

My new house in NM has flexible plastic pipes. - Norm 06:33:46 10/04/08 (4)

RE: My new house in NM has flexible plastic pipes. - jea48 11:47:28 10/05/08 (3)

It was built in 2002. - Norm 05:42:56 10/06/08 (2)

RE: It was built in 2002. - KLS 12:39:05 10/10/08 (1)

I doubt if it can be used as a ground. nt - Norm 12:59:32 10/14/08 (0)

RE: Should I re-ground? - Slick 11:43:06 09/28/08 (5)

Nice post.... But please reread my first post before responding to this one. - jea48 22:25:12 09/28/08 (1)

RE: Nice post.... But please reread my first post before responding to this one. - Slick 04:51:24 09/29/08 (0)

Friendly counterpoint - cdb 13:47:13 09/28/08 (2)

RE: Friendly counterpoint - Slick 04:44:35 09/29/08 (1)

RE: "...our local jurisdictions require..." - cdb 19:09:07 09/29/08 (0)

RE: 2 rod electrodes - cdb 12:04:34 09/27/08 (0)

The issue of audio performance and the safety-earth impedance. - Al Sekela 11:33:04 09/27/08 (0)

There should be one there already - Russ57 13:51:00 09/26/08 (0)

Hire a qualified electrician. - Al Sekela 11:46:28 09/26/08 (3)

RE: Hire a qualified electrician. - RickeyM 20:43:31 09/26/08 (0)

RE: Hire a qualified electrician. - sailor321 13:02:56 09/26/08 (1)

RE: Hire a qualified electrician. - Melchior 11:09:07 09/27/08 (0)

Follow Ups

Friendly counterpoint - cdb 13:47:13 09/28/08 (2)

RE: Friendly counterpoint - Slick 04:44:35 09/29/08 (1)

RE: "...our local jurisdictions require..." - cdb 19:09:07 09/29/08 (0)

Friendly counterpoint

4.243.182.165

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