[RE-wrenches] Mike Holt Solar Video - LIVE in your town, limited time only

[August Goers]

Hi Glenn,



This is a confusing passage without seeing the context from the other parts
of 690.47 (A, B, C etc). Can you send the full passage if it’s handy for
you? My 2014 NEC is in the mail so I have yet to see the full implications
of this section.



Best,



August



*From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Glenn Burt
*Sent:* Monday, December 09, 2013 12:51 PM
*To:* 'RE-wrenches'
*Subject:* Re: [RE-wrenches] Mike Holt Solar Video - LIVE in your town,
limited time only



The bad news from the 2014 codebook:



*690.47 Grounding Electrode System.*

*(D) Additional Auxiliary Electrodes for Array Grounding.*

A grounding electrode shall be installed in accordance

with 250.52 and 250.54 at the location of all ground- and

pole-mounted PV arrays and as close as practicable to the

location of roof-mounted PV arrays. The electrodes shall be

connected directly to the array frame(s) or structure. The dc

grounding electrode conductor shall be sized according to

250.166. Additional electrodes are not permitted to be used

as a substitute for equipment bonding or equipment grounding

conductor requirements. The structure of a ground- or

pole-mounted PV array shall be permitted to be considered

a grounding electrode if it meets the requirements of

250.52. Roof-mounted PV arrays shall be permitted to use

the metal frame of a building or structure if the requirements

of 250.52(A)(2) are met.

*Exception No. 1: An array grounding electrode(s) shall*

*not be required where the load served by the array is integral*

*with the array.*

*Exception No. 2: An additional array grounding electrode(*

*s) shall not be required if located within 1.8 m (6 ft)*

*of the premises wiring electrode.*





-Glenn



*From:* re-wrenches-bounces at lists.re-wrenches.org [
mailto:re-wrenches-bounces at lists.re-wrenches.org<re-wrenches-bounces at lists.re-wrenches.org>]
*On Behalf Of *Jason Szumlanski
*Sent:* Monday, December 09, 2013 2:22 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Mike Holt Solar Video - LIVE in your town,
limited time only



I had to quit watching at noon, so I was disappointed to have missed the
theatrics. I just installed a system on my home to NEC 2008 as is followed
here. I have convinced a local plans reviewer that since it was removed in
NEC 2011, the building official should waive the 690.47(D) requirement for
rooftop systems. He specifically asked me if it would return in NEC 2014,
and if I am reading this right, the answer is definitely "no."



Since there was no aesthetically acceptable way to run the additional GEC
in my case and make it "as close as practicable (which is ambiguous
anyway), I cut it out immediately following inspection - something I would
NEVER recommend a customer do, of course. Nonetheless, I feel this was a
reasonable and acceptable move given that there are thousands of systems
out there inspected under NEC 2011 that have not additional grounding
electrode.



I will continue to listen with great interest...



Jason Szumlanski

Fafco Solar






On Mon, Dec 9, 2013 at 9:21 AM, Richard L Ratico <
Richard.L.Ratico at valley.net> wrote:


Mr. Holt explicitly stated his desire to create a groundswell of opinion to
immediately eliminate this requirement of the code. Would it not be better
to
carefully think through and discuss the issue, in contrast to what was
permitted
on his "show"?
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