Teeing into existing tray containing cable

[BurnabyBeej]

Hi all,

We have an upcoming installation where we need to run a tee and waterfall down from a high-mounted tray to some additional equipment. The existing tray has cables in it, although there is capacity for the additional equipment.

Will it be necessary to cut a tee into the tray or is there an easier way to do this? I've been looking through tray catalogs and installation manuals and don't see any other way other than allowing the cable to go "free air" between the trays.



Thanks.

 

[don_resqcapt19]

I would just run the new tray below the existing tray, and drop out of the existing tray between the rungs into the new tray. You will need a bonding jumper between the two independent trays.

392.18(A) Complete System.
Cable trays shall be installed as a complete system. Field bends or modifications shall be so made that the electrical continuity of the cable tray system and support for the cables is maintained. Cable tray systems shall be permitted to have mechanically discontinuous segments between cable tray runs or between cable tray runs and equipment.

 

[BurnabyBeej]

Thanks very much, Don. We have a #2 bare ground running through the existing tray, so we'll burndy to that one and bring it down into our new tray. Cheers.