Tray cable support

[Free Electrons]

I have a job where we are installing TC- ER cable in cable tray then leaving the tray and running the beam(supported at 6' intervals) to GRC risers from equipment disconnects. My question is what is a LISTED support for type TC-ER cable? I cannot seem to find anything. Why can't they list bridal rings or J hooks for use.

 

[Christoph]

NEC 336.10 (7)(c) names struts, angles or channels as acceptable means of support.

TC cable seems to be an ongoing uncomfortable item for the folks here in the states. It is a rather resilient wire by itself, i.e. you couldnt rip the insulation off of it with bare hands as with romex. so all they ask is that you mechanically protect it. 336.10(7) has other requirements such as supervision of qualified personnel etc.

the NEC hadbook also names UL1277 which then refers to UL514B.

 

[Christoph]

Adder:

j hooks dont provide enough mechanical protection as far as I am concerned, I have used EMT before as "support". It was a running gag how the management people used to emphasize, we are NOT using EMT as such, we are SUPPORTING the cable.

 

[Christoph]

Notice how I just plopped a connector on and there the EMT ends. Just goes from there into the box. Less that 6 feet is all.

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[Free Electrons]

This is an Industrial plant and the exposed runs are only at the ceiling, but Inspectors will gig you on MC in bridal ring so I use listed MCS101, but don't they mind #3/4 MC in a mini(Listed for EMT) on a beam clamp. Both clean installs. But are they UL listed? I want something that an inspector can't argue. Does it exist?

 

[Christoph]

That answer will have to be NO. Due to the fact that they "interpret" the rules.