[RE-wrenches] 690.14 (4) Max Number of Disconnects

[Mark Frye]

OK,
 
So what is your plan with regard to 690.14 (D)?
 
It is interesting to ask, do the disconnects required by 690.14 (D) also
have to comply with or be counted in with 690.14 (4) and (5).
 
690.13 and 690.14 are pretty confusing in the use of the term disconnect.
Which sections apply to the disconnecting DC PV source circuits and which
sections apply to AC PV system circuit, which to both? Can the switches
integrated into some inverter by the manufacturer be regarded as the
disconnects required in these sections?
 
Here is my take:  The fused disconnect in the basement is the PV system
disconnecting means of which there is only one. This switch meets the
requirements of 690.15 "...A single disconnecting means in accordance with
690.17 shall be permitted for the combined ac output of one or more
inverters or ac modules in an interactive system." It meets the requirements
690.14 (C) (1) Exception so long as you comply with 690.31 (E). You still
need additional disconnects on the roof and labelling in accordance with
690.14 (D), but they don't have to comply with 690.14 (4) (5) so long as
there ac outpust are routed thru the 8th floor load center and thru the
switch in the basement.
 
I assume that the fused disconnect is co-located in the basement with the
service equipment?
 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  
 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Al Frishman
Sent: Wednesday, January 12, 2011 1:55 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects



Hi Mark,

Two will be in the same room as the panel and the rest will be located on
different sections of roof.

 

Al

 

Al Frishman
AeonSolar

(917) 699-6641 - cell
(888) 460-2867
www.aeonsolar.com <http://www.aeonsolar.com/> 

 

 

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mark Frye
Sent: Wednesday, January 12, 2011 4:49 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects

 

Al,

 

Are the inverters located inside on the 8th floor with the MLP panel or are
they located on the roof?

 

Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  

 

 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Al Frishman
Sent: Wednesday, January 12, 2011 1:11 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] 690.14 (4) Max Number of Disconnects

Hi Wrencher's

I am working on a system with 10 inverters.  The output of all 10 single
phase inverters will be combined in a main lug only panel located on the 8th
floor (each inverter will have a 2 pole breaker).  The MLO Panel will be
protected by a fused switch located in the basement.  Does the panel on the
8th floor used to combine all 10 inverters need to have a main breaker in
order to comply with 690.14 (4)?   

 

Any and all feedback is appreciated.

 

 

Al Frishman
AeonSolar

(917) 699-6641 - cell
(888) 460-2867
www.aeonsolar.com <http://www.aeonsolar.com/> 

 

 

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