ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 3
Recent Posts
Feed to spa panel
by HotLine1. 06/25/17 05:28 PM
Weatherhead, POA, height?
by HotLine1. 06/24/17 02:37 PM
Windows 7 update problem
by ampherder. 06/21/17 07:01 AM
Norwegian power?
by dsk. 06/19/17 03:40 PM
Anyone ever take a Furnas A14D drum sw apart?
by gfretwell. 06/17/17 08:14 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
238,222 Are you busy
173,438 Re: Forum
166,245 Need opinion
Who's Online Now
0 registered members (), 41 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#209273 - 03/20/13 11:17 PM EMT in concrete  
watersparkfalls  Offline
Member
Joined: Mar 2005
Posts: 216
Washington...Not DC
I know NEC will allow EMT in concrete with proper corrosion protection, I have always used pvc from day one on the job.
What do you use to install it in the concrete?

I only ask because the SUPER-Foreman on the job I am working at, scoffed at me when I questioned his decision to run emt from parking garage though pan deck up to next level, which they poured the concrete today.

However as I have said before I am in WA state, and we have a state code which supersedes NEC WAC 296-46B-358 which strictly forbids this type of installation not to mention there was no type of corrosion protection talked about in 300.6 just straight EMT(3. I tried to explain that I didn't think this was a good idea...unfortunately as I said he believes he is "Super E"

Thanks,
H20


2017 / 2014 NEC & Related Books and Study Guides

#209277 - 03/20/13 11:36 PM Re: EMT in concrete [Re: watersparkfalls]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,085
Estero,Fl,usa
RNC or RMC is about all I see in concrete unless they go with smurf. Metal seems to fail right at the top of the pour where it comes out. There are 2 schools of thought. Some say it is a chemical thing where the metal reacts with the concrete where they come together in air. The other thought is simpler. They assume that is just where water pools.


Greg Fretwell

#209280 - 03/21/13 05:49 AM Re: EMT in concrete [Re: watersparkfalls]  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Out in my area, local, specific, rules prohibit the practice.

Once saw a guy red tagged over it.

He was using the NEC -- and never slowed down to read the local regs.

!


Tesla

#209305 - 03/23/13 11:58 AM Re: EMT in concrete [Re: watersparkfalls]  
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
Greg,

I believe the stuff they call "Mambo" cable is also listed for concrete. It looks metal greenfield with wire in it and it is coated with plastic. It is listed for underground too and I also believe pool wiring.



Member Spotlight
togol
togol
NW In. USA
Posts: 421
Joined: September 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 15 (0.003s) Memory: 0.7605 MB (Peak: 0.8913 MB) Zlib enabled. Server Time: 2017-06-26 03:42:11 UTC