Hear is my topic - Stripping off the end of MC/AC sheathing (say 10') and terminating with a proper connection to EMT, and putting these wires in the EMT. Also terminating to a box and doing basicaly the same thing. The question is are these wires acceptable in EMT? I know in the NEC is says that the wire needs to be marked every 2', so if you look at THHN it has the wire info every two feet. Wires in MC/AC are not marked. Would this fall in with AHJ ? (Authority having jurisdiction)
MC wires in Conduit
- Thread starter bbrizzee
- Start date
- Status
- Location
- Massachusetts
I do this all the time.
As far as the required marking you could leave the plastic wrap on the cable with the markings but I do not.
The conductors from NM or MC are not marked when they are in the panel either.
As far as the required marking you could leave the plastic wrap on the cable with the markings but I do not.
The conductors from NM or MC are not marked when they are in the panel either.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
We do this too. Some MC cable actually has the conductors marked with all of the pertinent information.
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
Never had an inspector say anything.All mc will have thhn and most is thhn/thwn so why would he question it ?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Jim W in Tampa said:
The problem arises with unmarked conductors in the conduit meeting the requirements of 310.11(B). IMO this is a stupid requirement for this type of application.
- Location
- Massachusetts
infinity said:
Well that section requires the conductors to be marked and they where.
I don't see where that section requires the marking to remain after installation.
If it does require that the marking reamain...... all cables entering a panel are in violation of that section.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
If I look into a panel, by virtue of the cable emerging from the connector I can tell if it's MC or AC or NM cable. If I have a conduit with a bunch of unmarked conductors entering the panel how can I ensure that their insulation type is correct?
- Location
- Massachusetts
infinity said:
Trevor, how can you tell if it is NM-B without the jacket?
Assuming a recessed panel how can you tell who manufactured the condutor....a marking required by 310.11(A).
But beyond that, 310.11(A) says what it says, there is no wording that says it applies in a raceway but not in a panel tub.
So it either allows the cable being stripped or it does not but it is not location specific.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
The simple answer is that conductors in raceways require marking. Cable markings and conductors within raceways have different requirements as outlined in 310.11.
jamesguy10
Senior Member
- Location
- Amsterdam NY
i also do this all the time
The bare GC would be a pretty good indicator
I do the m/c conduit thing all the time too. I don't know OR care if it's technically legal or not. If I ever get tagged, I'll start to care. The thing tht DOES concern me is that the cable sheath is only grounded by means of a connector at ONE end. Hmmmm.....maybe that COULD be an issue.
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brian john
Senior Member
- Location
- Kilmarnock, Va
- Occupation
- Retired after 52 years in the trade.
I never really gave this a thought, but then I do not do much of this type of work.
This is done all the time and I see no problems with this, as for the marking..Ever look at #6 awg-750 kcmil after it is pulled into a piece of equipment, often the markings are GONE, due to soap, rubbing the conduit, newer lousy marking methods.
Oh and what inspector is looking in the conduit to see the markings.
This is a non issue,I MO. But if it is code.....
This is done all the time and I see no problems with this, as for the marking..Ever look at #6 awg-750 kcmil after it is pulled into a piece of equipment, often the markings are GONE, due to soap, rubbing the conduit, newer lousy marking methods.
Oh and what inspector is looking in the conduit to see the markings.
This is a non issue,I MO. But if it is code.....
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- Location
- Massachusetts
220/221 said:
Why is it only grounded at one end?
You do use a change over fitting from the MC to EMT right?
iwire said:
uhhh...not always. I guess I should though, huh?
There are cases in remodel where I have used an existing conduit stub as a path down the wall for example. Yeah, I should have stripped all the armor and used a connector/adapter.......but I didn't. I'm not going back there to fix it but I'll take the time to do it right next time.
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iwire said:
This brings up another discussion that's been hashed around on this forum a few times.
From the answers given, can I assume that it's OK to strip the covering from type NM cable and use the un-marked conductors to feed a A/C compressor (from compressor to disconnect)?
....inside liquid tight conduit of course.
steve
- Location
- New Jersey
- Occupation
- Journeyman Electrician
hillbilly said:
We've had these discussions before and the opinion has been that this is a violation. The same rule would apply to the method mentioned in the OP.
- Location
- Massachusetts
IMO there is no question MC can be run in any raceway.
If not how do we explain 330.10(A)(7)?
If not how do we explain 330.10(A)(7)?
- Status