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Cable ampacity in raceway leaving a cable tray

thread242-451709

Cable ampacity in raceway leaving a cable tray

Cable ampacity in raceway leaving a cable tray

(OP)
If I use 392.80 to determine the ampacity of the conductors in a cable tray, how do I rate the ampacity if the conductors leave the tray in a raceway for approximately 6' and terminate at a switchboard? Do I need to follow 310.15 for raceway? Is there a maximum distance I can run them in raceway before changing the overall rating?

RE: Cable ampacity in raceway leaving a cable tray

In the Canadian Electrical Code there is an exception for runs the lesser of 3 meters or 10% of the total run.
Check your code under Conductor Ampacity.

Bill
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