ASK:CABLE TRAY for Service of dwelling units in a apartment building

[rojhan123]

Good Day. I have 14 units(condo units) supplied in the same feeder can i put them all in the same cable tray? there will be 2-14mm2 1-8.0mm2 THHN wires per unit. If yes what size of cable tray should i used for this setup or if not what would you recommend for me to use.Thank you

 

[augie47]

Take a look at 392.3. I believe you will find the smallest single conductor that can be use is 1/0 and single conductors are restricted to industrial establishments.

 

[rojhan123]

So you mean Sir I cannot used the cable tray as a raceway for service conductors of each unit in the building?please enlighten me with these. Thank you

 

[augie47]

Not with individual conductors.

 

[GoldDigger]

You can use an enclosed wireway, but not an open cable tray.
Unless you use Tray Cable wires instead of normal individual conductors.

 

[rojhan123]

You can use an enclosed wireway, but not an open cable tray.
Unless you use Tray Cable wires instead of normal individual conductors.

Yes I will be using an enclosed one.

 

[Julius Right]

NEC 2014 art.392.10 (A) Wiring Methods. The wiring methods in Table 392.10(A) shall be permitted to be installed in cable tray systems under the conditions described in their respective articles and sections.
Unfortunately, no THHN,THNW and other single core insulated conductor -without an external jacket- is registered here.
As a compromise you have to run-at first- the cable through ENT conduit and then in cable tray.
You may use metal or nonmetallic wireway instead of [Art 376 or 378] for these cables.