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20 foot conduit lengths? #80948
06/12/02 08:17 PM
06/12/02 08:17 PM
M
MikeW  Offline OP
Member
Joined: Jun 2002
Posts: 35
Michigan
I recently saw some, installed, ¾” RMC that appeared to be in 20 foot lenghts. [Linked Image] I think it was RMC because it looked like it had an outer galvanized coating. Is this o.k.? I have never seen 20’ lengths of conduit before? What does this forum think?

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Re: 20 foot conduit lengths? #80949
06/12/02 08:21 PM
06/12/02 08:21 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
The gym in my daughter's school has MH fixtures hanging from what appear to be 20' lengths of 3/4".
I think it must be plumbing pipe.
I know of no manufacturer of 20' length conduit.

Re: 20 foot conduit lengths? #80950
06/12/02 09:34 PM
06/12/02 09:34 PM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
While I don't know of any manufacturer of longer conduit lengths, the code does permit such lengths in 342.130 and 344.130.


Don(resqcapt19)
Re: 20 foot conduit lengths? #80951
06/12/02 10:21 PM
06/12/02 10:21 PM
A
arseegee  Offline
Member
Joined: Jan 2002
Posts: 324
Statesboro, GA USA
What you saw most likely was 20' galvanized pipe which looks like rigid on the outside but has a nasty weld seam on the inside which is perfect for ripping up insulation on your conductors!

Re: 20 foot conduit lengths? #80952
06/12/02 10:32 PM
06/12/02 10:32 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
arseegee-- Isn't galvanized water pipe in 21-foot lengths? The male threads are similar to GRC, but couplings leave a dead-giveaway part of the male thread exposed. Anyone?

Re: 20 foot conduit lengths? #80953
06/12/02 10:46 PM
06/12/02 10:46 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Oops...it's PVC, but Carlon lists schedule 40 in 20-foot lengths. [And up to 8-inch!!]
http://www.carlon.com/Brochure%20PDFs/2B10%20-%20Conduit,%20Fittings%20and%20Accessories/Carlon%20Rigid%20Nonmetallic%20Utility%20Conduit%20&%20Elbows-2B10-p28-Mar01.pdf


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