I agree with everyone's sentiment, I always felt a little insulted
reading manufacturer's manuals and being told that covering modules was
enough. It isn't. . . . Remove load. . .Open circuit in as many places as
you have to. . hahahaha.
On Dec 24, 2017 19:18, "Chris Worcester" wrote:
Hi
Hi Jay,
Years ago I had one Sunny Boy system needing looking at string to string, and
covered them with multiple layers of blankets and tarps, only to get one heck
of a jolt... short of a good primer paint and barbeque black top coat, I'll not
waste the time, and know they are always treated as
: Saturday, December 23, 2017 7:38 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Covering modules
HI Dan,
Would you have a link to that UL test?
These folks hopefully will listen to UL but they won’t listen to me, I don’t
have enough letters after my name.
And thanks to all for chiming in. Yes I
Jay:
You are quite right to object to the concept of covering PV modules as a
means to energize feeders. It is not practical on any level. Implementing
this on a roof with the potential for unexpected wind gusts adds to the
risk of a service call. We know 99% of the tarps available are not opa
This is the best I can do right now on a holiday weekend.
https://newscience.ul.com/articles/pv-panels
And, if you are going to try it, gotta get the GOOD tarps, and dog them
fast.Know the knots.
Dan Fink
Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ P
Hi jay, i once covered the array started work and got bit another time
with street light and full moon and got bit covering is not adequate
On Dec 23, 2017 5:04 PM, "Martin Herzfeld" wrote:
> 1. NEC 690.18 was removed from the Code in 2017 and an "opaque covering"
> for Installation and Servi
HI Dan,
Would you have a link to that UL test?
These folks hopefully will listen to UL but they won’t listen to me, I don’t
have enough letters after my name.
And thanks to all for chiming in. Yes I agree with all of you, all good
points. But you know, an engineering group is going to want
Just look at the latest UL test results on tarps, and firefighter foam. A
tarp blowing off in some wind could expose workers to a high-voltage
situation when they thought it was safe. Blue tarps don't work, you have to
get the better grade. FF foam slides off and doesn't block enough
wavelengths.
1. NEC 690.18 was removed from the Code in 2017 and an "opaque covering"
for Installation and Service of an Array.
2. Light to the underside of the array is still an issue too for a
ground-mount - albedo. Try this in sunlight on a windy day? :)
I'd also suggest "treating everything as if it were
I always thought this was a waste of time, waste of materials, and gives a
false sense of security. I have had the crap shocked out of me while trying
to hurry and finish up string connections in a combiner box when it was almost
dark and could barely see so now I never assume near darkness me
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