Industrial Tank Heater Insert - Wire Sizing/Load Calculations

[jdaigle5]

I have a caustic tank installation project that will require an insert Heater with power Requirements of 24KW - Roughly 28A FLA.

28 *1.25 = 35A. We would need a 35A breaker to be in line with the NEC requirements.

We only have a 45A breaker available. Would it be acceptable to use the 45A breaker to feed a disconnect fused at 35A to get the appropriate protection? I know this is normally something that is done when feeding AC equipment - wasn't sure if it was something that would find acceptable for a heater.

Thanks in advance.

 

[rc/retired]

I have a caustic tank installation project that will require an insert Heater with power Requirements of 24KW - Roughly 28A FLA.

28 *1.25 = 35A. We would need a 35A breaker to be in line with the NEC requirements.

We only have a 45A breaker available. Would it be acceptable to use the 45A breaker to feed a disconnect fused at 35A to get the appropriate protection? I know this is normally something that is done when feeding AC equipment - wasn't sure if it was something that would find acceptable for a heater.

Thanks in advance.

IMO, yes. The fuses would protect the heater.

Ron

 

[petersonra]

the feeder to the fused disconnect would need to be sized for an ampacity of 45 Amps unless it qualifies as a tap conductor.