[RE-wrenches] NEC 110.13 - Mounting of Combiner

[Jason Szrom]

Ray,

 

Thanks for the input. We always design the ballasted systems with a
structural engineer performing wind and roof loading calcs. We were
asked this question by an engineer that is not familiar with the
laws/codes in the U.S. and to my knowledge it has never come up before.

 

Thanks,

 

Jason Szrom

Engineer

Solar Energy Systems, LLC

718-389-1545 x13

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of R Ray
Walters
Sent: Monday, October 26, 2009 6:35 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] NEC 110.13 - Mounting of Combiner

 

If the ballasted system is properly designed to withstand the wind
loading (90 mph to 150 mph), I would say that that most definitely
qualifies as "firmly secured".

Is someone actually giving you trouble on this issue, or are you just
thinking ahead?

 

R. Walters

ray at solarray.com

Solar Engineer

 

 





 

On Oct 26, 2009, at 1:51 PM, Jason Szrom wrote:





Hello Wrenches...

 

In typical ballasted systems, the combiner box is mounted on unistrut
fastened to roof stand-offs which are not fastened to the roof. I was
wondering what your opinion would be about this in reference to the
following NEC section:

 

110.13 Mounting and Cooling of Equipment

(A) Mounting. Electrical equipment shall be firmly secured to the
surface on which it is mounted.

 

Has anyone ever had a problem with this during an inspection?

 

Thanks,

 

Jason Szrom

Engineer

 

Solar Energy Systems, LLC

1205 Manhattan Ave

Suite 1210

Brooklyn, NY 11222

 

718-389-1545 x13

www.solarEsystems.com <http://www.solarEsystems.com/> 

 

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