Trying to size a feeder per NEC 430. I am deeling with hermetic compressors so I am using a combination of 430 and 440. I have a mixed load that consists of 3 branches. 1 branch contains my largest motor and a condensor fan. The next branch contains a smaller compressor. And the 3rd branch has a heater.
When calculating the MINIMUM feeder OCPD, I am taking the largest motor (compressor) OCPD plus the sum of all the other concurrent loads. My question is this: Since my largest motor is on a branch that has another motor load, do I take the value of the OCPD only in my feeder calculation, or do I take the value of the OCPD plus the FLA of the condenser fan on the same branch as my largest motor(compressor)?
The OCPD on the branch that contains the largest compressor contains another motor. I am using this branches OCPD, and then also add again the smaller motor on the same branch, I will be counting this smaller motor 2 times and that seems wrong.
When calculating the MINIMUM feeder OCPD, I am taking the largest motor (compressor) OCPD plus the sum of all the other concurrent loads. My question is this: Since my largest motor is on a branch that has another motor load, do I take the value of the OCPD only in my feeder calculation, or do I take the value of the OCPD plus the FLA of the condenser fan on the same branch as my largest motor(compressor)?
The OCPD on the branch that contains the largest compressor contains another motor. I am using this branches OCPD, and then also add again the smaller motor on the same branch, I will be counting this smaller motor 2 times and that seems wrong.