MC stripped out

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wireday

Senior Member
Location
New England
Occupation
Master electrician
Hello, I have up coming job that will be a run of mc to a receptacle, on the panel end there is two 1.25 inch EMT risers out of the panel up to a small wire trough.would it be best to run thhn stranded up from the panel and junction in the trough or strip out the mc and loop it from the trough down to the panel? I thank you for any thoughts on this. Al
 
kwired

kwired

Electron manager
Location
NE Nebraska
wireday said:
Hello, I have up coming job that will be a run of mc to a receptacle, on the panel end there is two 1.25 inch EMT risers out of the panel up to a small wire trough.would it be best to run thhn stranded up from the panel and junction in the trough or strip out the mc and loop it from the trough down to the panel? I thank you for any thoughts on this. Al
Click to expand...

Technically you can't do your second suggestion unless the conductors within the cable are marked as required by 310.11.
 
T

texie

Senior Member
Location
Fort Collins, Colorado
Occupation
Electrician, Contractor, Inspector
kwired said:
Technically you can't do your second suggestion unless the conductors within the cable are marked as required by 310.11.
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I would agree, but as a practical matter I would not have an issue with it. We all know that MC is really THHN. This goes back to the discussion the other day about why they make MC to emt connectors.
 
Smart $

Smart $

Esteemed Member
Location
Ohio
kwired said:
Technically you can't do your second suggestion unless the conductors within the cable are marked as required by 310.11.
Click to expand...
I know this seems to be the consensus... but what is the rationale? Change in wiring method?

Technically, if the MC were not properly marked, you wouldn't be able to use the MC... according to that same section.
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Some MC does contain individually marked conductors. If you really want to comply make sure you buy the right stuff. Here's some that we used on a recent job:

Rob's+Work+044.JPG


Rob%27s%2BWork%2B045.JPG
 
kwired

kwired

Electron manager
Location
NE Nebraska
Smart $ said:
I know this seems to be the consensus... but what is the rationale? Change in wiring method?

Technically, if the MC were not properly marked, you wouldn't be able to use the MC... according to that same section.
Click to expand...

310.11(B)(2) says " Metal-covered multiconductor cables shall employ a marker tape located within the cable and running for its complete length"
I have never seen MC cable that did not have a marker tape.
 
Little Bill

Little Bill

Moderator
Staff member
Location
Tennessee NEC:2017
Occupation
Semi-Retired Electrician
All the inspectors here will allow you to strip MC and run it into conduit.

They do however require you to use the proper connector if using EMT.

Or leave enough jacket on the MC if running into PVC to protect the wires from abrasions.
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
kwired said:
310.11(B)(2) says " Metal-covered multiconductor cables shall employ a marker tape located within the cable and running for its complete length"
I have never seen MC cable that did not have a marker tape.
Click to expand...

There is no 310.11.
 
Smart $

Smart $

Esteemed Member
Location
Ohio
kwired said:
310.11(B)(2) says " Metal-covered multiconductor cables shall employ a marker tape located within the cable and running for its complete length"
I have never seen MC cable that did not have a marker tape.
Click to expand...
As such, the "marking" is compliant. It does not have to be on the individual conductors. There is no rule that says the exposed conductors must be "marking" compliant for extension into other wiring methods.
 
kwired

kwired

Electron manager
Location
NE Nebraska
Smart $ said:
310.11 in 2008 NEC got moved to 310.120 in 2011 NEC
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Oops. I was looking through earlier editions for a response to another thread, did not realize I was not on 2011 when I looked this one up. Quote I gave was actually from 2005. NEC plus gives you quick access to 2002 through 2011 editions.
 
R

rt66electric

Senior Member
Location
Oklahoma
What do ypu have on the truck??

What do ypu have on the truck??

Either method would be fine . I would go with what I had on the truck. I have often stripped out the outer sheath on MC cable and then stick it in "whatever" conduit, for the simple reason, It was easier/cheaper than a trip to the store.


I worked as a sub-contact employee for a large high tech corp, ( i made more hooking up 3Phase 208 to the equipment than the over-educated techs). The maint-mgr(whom I respected ) walked by as I was fighting a $0.79 part to function. 15min later he walked back . He stopped as I was still reworking the connector, And said " Look I pay your boss $60/hr thats $1 a minute... DO NOT take 15min to jack with a $2 part"

At that point ..... I GOT IT. Do not let a dime hold up a dollar.....


My point is get the job done. there will always be another as soon as you are done, If not take a break and rest up.
 
electrofelon

electrofelon

Senior Member
Location
Cherry Valley NY, Seattle, WA
texie said:
I would agree, but as a practical matter I would not have an issue with it. We all know that MC is really THHN. This goes back to the discussion the other day about why they make MC to emt connectors.
Click to expand...

Do they make MC to EMT connectors? I have never seen one. The common two screw combination clamp to 1/2 EMT connectors are described on the box as NM to EMT. I have never researched what they are listed for....
 
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