[RE-wrenches] 690.47(D)

[Mac Lewis]

Hi Mark,

Here in Colorado, we've been on the 2014 code for about 3 years. There have
been various AHJ interpretations.  Unfortunately for us, its kind of ended
up that on all arrays, the inspectors expect a dedicated ground rod
directly adjacent to the array.  This includes arrays mounted on the same
building as the service entrance equipment.  I've had to beg to be able to
run it down the north roof to keep it out of view.  If it happens that the
roof you are mounting to is right near the service entrance, you can use
the existing ground rod.

I think its a very strange requirement and no one quite understands why
this makes these installations safer.

Good luck

On Jan 30, 2017 2:01 PM, "Jason Szumlanski" <jason@
floridasolardesigngroup.com> wrote:

> Further to August’s reply, here it is:
>
> http://iaeimagazine.org/magazine/2015/06/23/bonding-and-
> grounding-pv-systems/
>
> ​Jason​
>
>
> On Mon, Jan 30, 2017 at 1:47 PM, August Goers <august at luminalt.com> wrote:
>
>> Hi Mark,
>>
>> The current issue of IAEI magazine has an article writing by Bill Brooks
>> called "Hot Topics for PV System Installations." In the article, he
>> directly addresses 2014 NEC 690.47(D).
>>
>> Unfortunately I don't see this article posted online, but you might want
>> to check it out if you can find it.
>>
>> My understanding is that the intent of 690.47(D) is to require an
>> additional electrode when PV is installed on structures that don't already
>> have and electrode system such as a separate building, garage, etc.
>>
>> August
>>
>> -----Original Message-----
>> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
>> Behalf Of markf at berkeleysolar.com
>> Sent: Monday, January 30, 2017 10:24 AM
>> To: re-wrenches at lists.re-wrenches.org
>> Subject: [RE-wrenches] 690.47(D)
>>
>> Folks,
>>
>> NEC 2014 is in effect in California. I just pulled a permit for a
>> residential system and it had a little stamp that had 690.47(D) circled as
>> a requirement.
>>
>> Anyone worked with AHJ's in California who are now requiring this? I am
>> planning to not install the electrode, siting Exception 2 and trying to
>> say that the existing electrode next to the build is "next to the array"?
>>
>> Mark
>>
>>
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