minimum clearances [RE-wrenches]

[Geoff Greenfield]

Remember that the NEC does reference "installation according to
manufacturer's instructions".  This seems obvious but came up for us with a
Xantrex GT we wanted to mount on a flat roof (kind of tacked onto the back
of a rack).  We had to build a strut wall to get up (I think) it was 24"
above the deck.  This obviously made sense as we get snow every couple years
etc....

bottom line is the bottom line may be higher than the NEC says the bottom
line needs to be....

For a brighter energy future,

Geoff Greenfield
NABCEP Certified PV Installer

"Clean Energy, Expertly Installed"

Third Sun Solar & Wind Power Ltd.
340 West State Street
Athens, OH 45701
www.third-sun.com <http://www.third-sun.com>

(740) 597-3111   ( Fax: 1548)





-----Original Message-----
From: RE-wrenches at topica.com [mailto:RE-wrenches at topica.com]
Sent: Tuesday, February 13, 2007 7:03 AM
To: RE-wrenches at topica.com
Subject: Digest for RE-wrenches at topica.com, issue 2329


-- Topica Digest --

	minimum clearances
	By marco at pvthawaii.com

	Re: minimum clearances
	By allan at positiveenergysolar.com

------------------------------------------------------------

Date: Mon, 12 Feb 2007 07:05:24 -1000
From: "marco" <marco at pvthawaii.com>
Subject: minimum clearances



I've got an install using several SMA 6000s.  I know what the clearances for
the working spaces for electrical equipment are: 36" in front, 30" wide, and
6'6" high. The SB6000 inverters need 8" clearance around them. Does anyone
know what the minimum clearances are as far as mounting an inverter off the
floor as far as the NEC is concerned? Is it 3", 12", 36" or nothing at all?
How about an inverter AC output load center? Same thing as any distribution
panel I would think. I can't find anything to say what the min. or max.
would be off the floor though. I know a manually operated disco handle can
not be higher than 6'7" without some special attachments. I thought there
was a min of 36" for the handle in the off position off the floor. I just
can't seem to find it in the code. Any ideas?

thanks,
marco
ProVision in Hilo, Hawai'i




------------------------------

Date: Mon, 12 Feb 2007 10:14:52 -0700
From: "Allan Sindelar" <allan at positiveenergysolar.com>
Subject: Re: minimum clearances [RE-wrenches]



Marco,
We faced this same issue recently on a 25kW utility job. There is no minimum
height specified for service equipment in the NEC that applies to your
question. Something in trailer parks, I think.

Allan at PosE

----- Original Message -----
From: "Marco Mangelsdorf" <marco at pvthawaii.com>
>
> I've got an install using several SMA 6000s.  I know what the clearances
for
> the working spaces for electrical equipment are: 36" in front, 30" wide,
and
> 6'6" high. The SB6000 inverters need 8" clearance around them. Does anyone
> know what the minimum clearances are as far as mounting an inverter off
the
> floor as far as the NEC is concerned? Is it 3", 12", 36" or nothing at
all?
> How about an inverter AC output load center? Same thing as any
distribution
> panel I would think. I can't find anything to say what the min. or max.
> would be off the floor though. I know a manually operated disco handle can
> not be higher than 6'7" without some special attachments. I thought there
> was a min of 36" for the handle in the off position off the floor. I just
> can't seem to find it in the code. Any ideas?
>



------------------------------



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