440.33 Motor-Compressor(s) With or Without Additional Motor Loads
- The sum of the rated-load or branch-circuit selection current, whichever is greater, of all motor-compressor(s)
- The sum of the full-load current rating of all other motors
- 25 percent of the highest motor-compressor or motor full load current in the group
Exception No. 1: Where the circuitry is interlocked so as to prevent the starting and running of a second motor-compressor or group of motor-compressors, the conductor size shall be determined from the largest motor-compressor or group of motor-compressors that is to be operated at a given time.