[TheForge] Fw: EMT markings

[David E. Smucker]

Bob,  I think it has been marked for some time now, at least several years. 
My guess is that it start about the same time as color was introduced for 
the outside of Romex.  White - #14, Yellow - #12, Orange - #10 etc.  This 
was started in 2001 to help inspectors see what had been installed.  Romex 
can still be used with the white jacket in all sizes but new manufacture 
must have the colors.

EMT isn't really conduit -- it is "thin wall" conduit not to be confused 
with real conduit used for industrial electrical applications.  Real conduit 
has straight thread pipe threads.  My guess, is that the marking is to once 
again help inspectors know what is installed.

Dave

--------------------------------------------------
From: "Bob Ehrenberger" <eforge at centurytel.net>
Sent: Tuesday, November 03, 2009 10:55 AM
To: "theforge" <theforge at mailman.qth.net>
Subject: [TheForge] EMT markings

> I noticed that EMT tubing (electrical conduit) is stamped with the letters
> "EMT" now. I think this is new as I hadn't noticed it until about 6 months
> ago.  Do any of you know why they changed?  Are they concerned that 
> someone
> will use EMT in place of structural tubing?
>
> Robert Ehrenberger
> Shelbyville, Mo.
> eforge at centurytel.net
>
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