I watched most of the streaming video of Mike Holt and six PV industry
professionals this weekend. The most interesting aspect of it was Mr. Holt's
very dramatic build up to the Sunday discussion of Article 690.47(D) which
brings back the requirement for an auxiliary grounding electrode for PV
Hello folks,
Generally speaking, what is the efficiency range of a 480 to 208 3-phase
delta xformer, common in industrial settings, rated from 35 to 75kva?
Thanks.
Kirk Herander
VT Solar, LLC
dba Vermont Solar Engineering
NABCEPTM Certified Inaugural Certificant
NYSERDA-eligible
Hi All,
As a followup to Phil's good news from October 18, has anyone had issues with
utilities on approving GTBB?
We're in PGE, and they seem to be stonewalling an NEM application we submitted
2 months ago. It's a normal Radian GTBB setup. They asked for additional
information twice, which
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
Here's a link to the video:
http://youtu.be/YuDqXFvRv94
Brian
On Dec 9, 2013, at 2:21 PM, Jason Szumlanski ja...@fafcosolar.com wrote:
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
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
I agree with Mike on this, as written this is a bad Section, and in reality
there is no need for it, so deleting it is better than trying to fix
something that is unnecessary.
The 2014 690.7(D) language has changed - the title is now Additional
Auxiliary Electrodes..; in 2008 the title to be
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:*
Friends:
I have a client with 28 year old batteries. They are in great shape with
excellent specific gravity. I have no idea why they have lasted so long.
We recently pulled an old Heart HF series inverter and installed an Outback
VFX3524 inverter. Coincidentally the client purchased a new
William,
My first inverter in my own home in 1985 was a Heart Interface. I may have
the specs on that inverter. I will look around tomorrow for them. I'm
remembering the idle draw as about 10 Watts.
What make and model battery are these? My house is on its third set of
batteries and also
William;
I don't remember the Heart inverters as having a particularly high idle
current draw. If Dave can find the specs I'd be interested to get them too;
I do still occasionally run into Hearts, almost always still working great.
I think I've only scrapped one since 1994.
28 years on a
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