They can safely shut down any electrical system in a building—except for PV
systems.
Not completely true, as batteries are stored energy systems and while they may
be disconnected, are still energized regardless of the state of other systems.
-Original Message-
From: David Brearley
This is where my gripes on signage originate. Discos module level vs remote
string vs rooftop string vs battery backup. How to label? How to educate
firefighters?
On Jan 23, 2014 5:50 AM, Glenn Burt glenn.b...@glbcc.com wrote:
They can safely shut down any electrical system in a building—except
Dan,
I believe you are referring to the Sedona fire when you talk of the
energized fence. I believe the fire department was in error when they
reported that the rooftop EMT energized the fence. It is pretty clear from a
review of the facts that the ac service drop burned free from the house
Hi gang. The spec sheet for the battery has a bar graph for a 5-hr. rate:
6,200 cycles at 10% DOD
5,700 at 20%
1,800 at 50%
600 at 80%
425 at 100%
Tom Duffy wrote at 06:13 PM 1/22/2014:
Life depends on the depth of discharge. What load are you calculating? That
will determine the battery
I must jump on my soap box, as I have so many time in the past, and
follow up Glenn's comment here. We worry so much about details of PV
arrays, while batteries are serious safety hazards that no one
(including the NEC) ever wants to address. Not only can they not be
de-energized, they have
Ray--
What poisonous fumes do lead-acid batteries off-gas? I know they off-gas
hydrogen, which can be an explosion hazard -- but hydrogen isn't poisonous. Or
were you thinking about a different type of battery.
Jeffrey Quackenbush
On Thursday, January 23, 2014 8:19 PM, Ray Walters
Friends:
As a courtesy, can we all try to remember to change the subject line to an
appropriate phrase when replying? I don’t want to miss a single post, but they
are hard to sort or search without a descriptive subject line.
Thank you very much.
william
From:
John:
These panels are typically rated only 320A continuous duty, so I think your
numbers would not compute.
William
On Jan 23, 2014, at 11:31 AM, John Powell a...@solforce.com wrote:
Has anyone tried to connect one 40 amp inverter output circuit to each of the
two breakers on a 2 x
I would think this would be fine, so maybe I am missing the issue. Does
CA have a state-specific rule on this? What you're asking is whether you
can safely install a 40A inverter circuit in each of your interior
[200-225A] panelboards fed from this meter main, right? This is two
separate
Thanks WIlliam,
Some of the old Milbank units are 320 amp rated socket. The Murray 2 x 200's
are 400 amp rated.
Best regards,
Abe
--
J. Abraham Powell
President
Solforce Systems, Inc.
224-G South Milpas Street
Santa Barbara, CA 93103
Phone: (805) 695-0015
Fax: (805) 565-1661
Cell: (805)
Can anyone comment on the S-5! CorruBracket?
Any other recommendations or comments appreciated.
Jeremy Rodriguez,
President
All Solar, Inc.
1463 M
Penrose Colorado 81240
719-372-3808 office
719-372-3804 fax
www.asolarelectric.com
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
William and John,
A 320 as it is affectionately called is a 400-amp panel with a 320-amp
continuous duty. This is identical to two 200-amp panels that each has a
160-amp continuous duty-that we put 40-amp breakers into on a routine basis.
The busbars are rated for 200-amps each, just like a
Thanks for the correction on that sedona fire Bill; I had only seen the
incorrect fire dept report.
I wish there was a clearinghouse for information on RE incidents and close
calls as they are all teachable moments for both RE professionals and
firefighters.
I ditto the need for more NEC guidance
I'm definitely interested in being involved too. I really respect how
difficult the language crafting can be, and the frustration to have
certain intent be misconstrued by an AHJ some where else later.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
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