TC Cable in Cable Trays
- Thread starter asaq
- Start date
- Status
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
there is not a simple answer.
Article 336 only describes tray cables. I don't see how they could be TC without being so marked, however, it appears there is no requirement in article 336 that TC be listed. That is a curious omission.
You can indeed install cables other than type TC in a tray cable, as long as it is one of the wiring methods found in table 392.10(A) and you follow the rules found in the article that applies to that wiring method.
Cable tray use is not prohibited in dwellings but is rarely if ever used in houses.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
I suppose it depends on which Edition you are referring to, but I'm stunned none of our other colleagues didn't mention Section 336.6. [2017 NEC (latest Edition)]
BTW Section 3xx.6 is now pretty much the default location for mentioning a Chapter Three product's listing requirements.
Thanks for quick answer
That is for me the question the 336.6 refers to the TC cable " Type TC cables and associated fittings shall be listed". The TC Cable shall be listed, but is it necessary to use an TC cabel ? That was my main question.
maybe the answer is given here - in case we use cable there is listed in 392.10(A).
But how we can use the sektion "Other factory-assembled, multiconductor control, signal, or power cables that are specifically approved for installation in cable trays" there could I find critrias for this approvement.
.... or is it only a circle dependency to the TC Cable ?
thx bernd
That is for me the question the 336.6 refers to the TC cable " Type TC cables and associated fittings shall be listed". The TC Cable shall be listed, but is it necessary to use an TC cabel ? That was my main question.
maybe the answer is given here - in case we use cable there is listed in 392.10(A).
But how we can use the sektion "Other factory-assembled, multiconductor control, signal, or power cables that are specifically approved for installation in cable trays" there could I find critrias for this approvement.
.... or is it only a circle dependency to the TC Cable ?
thx bernd
Last edited:
Search the term "cable tray" in this document: http://www.ul.com/wp-content/uploads/2014/04/WC_MG.pdf
UL is a nationally recognized testing laboratory as mentioned in 90.7
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
No 336.6 in 2011 NEC. And the word listed is not found in article 336 except where it talks about something being listed in a table.
It does exist in 2017 with an "N" next to it. I think that means it is new to that edition.
I guess I am going to have to switch to the 2017 edition.
I still find it curious that tray cable was not required to be listed until the 2017 edition. That just seems odd to me.
It does exist in 2017 with an "N" next to it. I think that means it is new to that edition.
I guess I am going to have to switch to the 2017 edition.
I still find it curious that tray cable was not required to be listed until the 2017 edition. That just seems odd to me.
- Status