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flexible metal conduit #56511
09/23/05 11:33 AM
09/23/05 11:33 AM
drgnz23  Offline OP
Joined: Feb 2002
Posts: 56
los angeles
Okay I work in a laboratory enviroment where i have to install two new receptacles in a room. Is it legal to run flex down the wall or do i have to run EMT? Maybe about forty feet long? Please help

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Re: flexible metal conduit #56512
09/23/05 12:46 PM
09/23/05 12:46 PM
Alan Nadon  Offline
Joined: Mar 2005
Posts: 399
Elkhart, IN. USA
Not a Code violation unless exposed to physical damage.
Also refer to Section 250.118(6) Lengths over six feet MUST have a grounding conductor.

If it was easy, anyone could do it.
Re: flexible metal conduit #56513
09/23/05 02:27 PM
09/23/05 02:27 PM
drgnz23  Offline OP
Joined: Feb 2002
Posts: 56
los angeles
Always run a grounded conductor.
Just having a discussion with my leadman and he thinks we should run EMT in walls. Without ripping away walls Flex should be legal to run. He swears that in our enviroment flex shouldnt be used. I cant find anything that says we cant.

Re: flexible metal conduit #56514
09/23/05 04:15 PM
09/23/05 04:15 PM
Joe Tedesco  Offline
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
EMT (Thinwall) is allowed to be fished without couplings.


Exception No. 2: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable,
unbroken lengths (without coupling) of EMT shall be permitted to be fished.

Joe Tedesco, NEC Consultant
Re: flexible metal conduit #56515
09/23/05 10:36 PM
09/23/05 10:36 PM
Peter  Offline
Joined: Jun 2004
Posts: 92
San Diego
How exactly is the EMT supposed to be held together without couplings?

Re: flexible metal conduit #56516
09/23/05 11:13 PM
09/23/05 11:13 PM
electricbill  Offline
Joined: Feb 2005
Posts: 20
chester ny usa
EMT is 10' long top plate to bottom plate(wall interior) is less than 8' no coupling concealed.


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