Circuit Breaker Labels

[fifty60]

I make circuit breaker labels to affix to equipment before they are shipped to the customer. I have an odd piece of equipment here that has a refrigeration compressor and an air circulator fan. Normally, the compressors are much larger than the air circulators, but for this equipment the air circulator (1/4HP 3.1A) is larger than the compressor (1/5HP 2.9A).

Simple enough, but compressor also has a condenser fan that turns on at the same time that draws an additional .35A. This would make its current draw more than the 3.1A of the 1/4HP motor. Since I am required to put the largest motor on the label, would I use the the largest motor (1/4HP 3.1A) or would I use the tandem 1/5HP 2.9A and Condenser fan (.35A)?

 

[kwired]

I make circuit breaker labels to affix to equipment before they are shipped to the customer. I have an odd piece of equipment here that has a refrigeration compressor and an air circulator fan. Normally, the compressors are much larger than the air circulators, but for this equipment the air circulator (1/4HP 3.1A) is larger than the compressor (1/5HP 2.9A).

Simple enough, but compressor also has a condenser fan that turns on at the same time that draws an additional .35A. This would make its current draw more than the 3.1A of the 1/4HP motor. Since I am required to put the largest motor on the label, would I use the the largest motor (1/4HP 3.1A) or would I use the tandem 1/5HP 2.9A and Condenser fan (.35A)?

Good question, common sense seems to say the 1/4 HP is the biggest motor, but the main concern typically is starting current and I can see a good possibility of the compressor drawing more starting current, especially if the blowers are shaded pole or any other low torque motor.