cable jacket stripping back to a condulet?

D

Dale001289

Senior Member
Location
Georgia
In general, how much cable jacket is allowed to be stripped on a multiconductor cable such as TC-ER, XHHW-2, 600V? The contractor wants to strip back to the T condulet and run the conductors through flex conduit to a motor, a length of about 3 feet. This seems to be excessive to me.
 
Dale001289 said:
In general, how much cable jacket is allowed to be stripped on a multiconductor cable such as TC-ER, XHHW-2, 600V? The contractor wants to strip back to the T condulet and run the conductors through flex conduit to a motor, a length of about 3 feet. This seems to be excessive to me.
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3”-4” Max in general


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The only issue is the cable surface markings if they're present on the portion of the cable in the raceway. If the conductors are marked then there is no limit as to how much cable jacket can be removed.
 
infinity said:
The only issue is the cable surface markings if they're present on the portion of the cable in the raceway. If the conductors are marked then there is no limit as to how much cable jacket can be removed.
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Question on that. My Mc cable has conductors not marked but a stip in the Mc says conductors are thhn, can I run those through conduit or not
 
AC\DC said:
Question on that. My Mc cable has conductors not marked but a stip in the Mc says conductors are thhn, can I run those through conduit or not
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IMHO the strip is part of the cable assembly, not a marking on the conductors themselves. But maybe you could strip the sheath and leave the strip with the conductors?

As @infinity says, if the conductors themselves are marked appropriately as conductors that you can use in the raceway, then you can strip the sheath off as much as you want and use the conductors in the raceway. In my experience, MC cable either has the inner conductors fully marked with a wire type that makes them suitable, or there is a strip like @AC\DC describes. I've never seen NM cable with inner conductor marking, but there is no rule against it. FWIW I just checked a bit of TC-ER-JP cable and it did not have inner markings.

-Jonathan
 
Dale001289 said:
infinity is there a NEC section that talks to this?
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There is not explicit permission in the NEC.

The NEC explicitly tells you which conductors may be used in raceways. The NEC also explicitly tells you that you can use cable assemblies with the correct markings.

If the conductors inside the cable assembly have suitable markings to be in a raceway, then the outer sheath of the cable assembly is simply not needed if you have the conductors in an appropriate raceway.

What is up for debate is how far you can strip back the outer sheath if the conductors on the inside do not have suitable markings. I don't think that the NEC provides any explicit length. IMHO you can strip back the outer sheath to point of entry to the terminating junction box, but not run the conductors in a raceway system. IMHO the situation described in the first post would require cable with inner conductors marked suitably for a raceway.

-Jonathan
 
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