Bill,
On large arrays with combiners and sub combiners, will a disconnect
be required on both the inverter and array side? The fuses will
still be energized from the inverter side when the array is turned
off, from other string sets connected to the inverter. .
Drake
At 09:38 PM 1/13/2010, you wrote:
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Kirk,
Disconnects within sight of combiner boxes will be required in 2011.
Another good reason to keep combiner boxes off residential rooftops.
This is targeting commercial rooftops where large system have no
disconnects for servicing fuses.
Bill.
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk
Herander, VSE
Sent: Wednesday, January 13, 2010 2:33 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] 2011 code and roof discos
On that note Bill, will roof disconnects be required in the 2011 NEC?
Kirk Herander
Vermont Solar Engineering
802.863.1202
NABCEP(tm) Certified Solar Installer
NYSERDA-eligible Installer
VT Solar Incentive Program Partner
----------
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Brooks
Sent: Wednesday, January 13, 2010 12:36 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Solar accumulation panel
Andrew,
It does not exist. We tried like crazy to get it into the 2011 NEC,
but to no avail. At the last second the proposal was put on hold
until the 2014 NEC. Major bummer. For now it can only be done with
AHJ approval. Many allow it but it is not in the NEC. Alternatively
you must use the sum of supply breakers no greater than 120%. Much
more restrictive.
Bill.
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Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648
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