[RE-wrenches] 2011 code and roof discos

[Drake Chamberlin]

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-bounces at lists.re-wrenches.org 
>[mailto:re-wrenches-bounces at 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-bounces at lists.re-wrenches.org 
>[mailto:re-wrenches-bounces at 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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