How high conduit off roof? [RE-wrenches]
Joel Davidson
joeldavidson at earthlink.net
Thu Aug 25 19:32:45 PDT 2005
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I hope this message gets through. Thank you all for your help and feedback.
I guess you all agree that the NEC does not specify conduit height (just
fastener spacing). I don't have the UBC handy, but don't recall it
specifying conduit height off the deck. The store-bought supports are good
looking. Allan's PVC stand-offs are a good idea. I've seen 4x4 PVC downspout
pieces used and they look good.
Some installers let the conduit supports just sit on the roof. Others fasten
them with nails, screws or roof mastic.
Interestingly, some Los Angeles inspectors require threaded conduit on the
roof because EMT comes apart when people trip over it.
I guess roof conduit blocks and height are determined by local custom or
whatever works.
Joel Davidson
----- Original Message -----
From: "Keith Cronin" <keith at islandenergy.net>
To: <RE-wrenches at topica.com>
Sent: Thursday, August 25, 2005 5:12 PM
Subject: RE: How high conduit off roof? [RE-wrenches]
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Joel
To the best of my NEC knowledge, there are no restrictions on height above a
roof surface. There are requirements for supporting the conduits.
It would be recommended to keep them off the roof at least 2 inches, for
maintenance of the roof, and also to mitigate the radiating heating effect.
Keith Cronin
President
Island Energy Solutions Inc.
270 Kuulei Rd. Suite 106
Kailua, HI 96734
808-262-3268 Tel
808-263-0338 Fax
keith at islandenergy.net
www.islandenergy.net
-----Original Message-----
From: Joel Davidson [mailto:joeldavidson at earthlink.net]
Sent: Tuesday, August 23, 2005 3:50 PM
To: RE-wrenches at topica.com
Subject: How high conduit off roof? [RE-wrenches]
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Wrenches,
Some installers mount conduit on 4x4 blocks. Some use 2x4 blocks. Some use
store-bought conduit supports. Does the NEC specify how high of the roof
conduit has to be?
Joel Davidson
[Non-text portions of this message have been removed]
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