[RE-wrenches] raintite box mounting angle

Peter Parrish peter.parrish at calsolareng.com
Mon Aug 24 13:11:49 PDT 2009


Max,

 

A cautionary tale. We used those puppies for a while until we had a call
back from a customer with a ground fault / off line condition. We found that
the box had warped, the seal rendered ineffective and the splices sitting in
0. 5" of water. After thinking about it, we decided that the 140+ deg F
summer roof temperatures probably caused the plastic to warp under thermal
stress. They probably would work just fine off the roof, but I can't
personally vouch for them.

 

- Peter

 

 


 

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Max
Balchowsky
Sent: Monday, August 24, 2009 12:48 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] raintite box mounting angle

 

We've been using the 6x6x4 plastic boxes with a gasket (electrical section
of most home depot stores)- mount them on their side at the edge of the
array. They are rated for electrical wiring and are water proof and have
been accepted and passed by every electrical inspector we've had over the
last few years. They are used alot by landscape contractors for j-boxes in
the ground.

Max Balchowsky
SEE Systems
760-403-6810

 

  _____  

From: Bill Brooks <billbrooks7 at yahoo.com>
To: kirk at vtsolar.com; RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Monday, August 24, 2009 9:08:34 AM
Subject: Re: [RE-wrenches] raintite box mounting angle




Kirk,

 

I'm fairly confident that if the manufacturer does not specify an angle for
NEMA 3R (rainproof) that the default is vertical. In special cases (e.g.
Outback PSPV), the NEMA 3R tests are requested at an angle, but this is
fairly rare. Upshot is that NEMA 3R boxes normally cannot be mounted in the
plane of the roof, while NEMA 4 and up can be mounted in the roof plane
since many of these boxes can be mounted from vertical to horizontal.

 

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: Monday, August 24, 2009 8:26 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] raintite box mounting angle

 

Hello,

 

Can anyone give a recommendation for a minimum mounting angle of a raintite
box? Ideally 90 degrees, but in this case I may be forced to mount it at the
same angle as the panels - about 25 degrees, mounted off the roof about 6
inches. I don't think there is any reference in the NEC to this. It will be
off the roof about 6 inches in a mild climate, where they only get about 20
inches of snow a year. Thanks.

 

Kirk Herander

Vermont Solar Engineering

802.863.1202

NABCEP(tm) Certified Solar Installer

NYSERDA-eligible Installer

VT Solar Incentive Program Partner

 

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