[RE-wrenches] NEC 690.55 - "maximum operating voltage"

[Eric.Bentsen at schneider-electric.com]

Hi Bob,
I would rather it be worded "maximum normal operating voltage". 
Maximum operating voltage would be the recommended BULK voltage for the 
battery type being utilized. 
Equalization is a maintenance procedure, which is why it calls for 
separate listing. 
It must also include polarity of grounded conductor.

Eric
_____________________________________________________________________________________ 


Eric Bentsen  |   Schneider Electric   |  Solar Business  |   UNITED 
STATES  |   Technical Support Representative 
Phone: +(650) 351-8237 ext. 001#  |   
Email: eric.bentsen at schneider-electric.com  |   Site: 
www.schneider-electric.com/solar  |   Address: 250 South Vasco Rd., 
Livermore, CA 94551 


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From:
"Bob Clark" <bclark at solar-wind.us>
To:
"'RE-Wrenches'" <re-wrenches at lists.re-wrenches.org>
Date:
06/10/2013 08:08 PM
Subject:
[RE-wrenches] NEC 690.55 - "maximum operating voltage"
Sent by:
re-wrenches-bounces at lists.re-wrenches.org



RE_Wrenches:
 
Can someone tell me what is being referred to in NEC 690.55 when it says 
“Photovoltaic power systems employing energy storage shall also be marked 
with the “maximum operating voltage, . . .” ?
 
We have an off-grid system which employs energy storage [i.e.; batteries]; 
so I need to know what exactly is referred to when this section mentions 
“maximum operating voltage” so I can put it on a sign.
 
Bob Clark
SolarWind Energy Systems, LLC

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