I have a load (480V) that after derating and such comes to about 185A. I am using a 200A feeder breaker to serve this load. When seleting feeder cable do I size the feeders to the 185A load or do I have to size them to the 200A breaker rating? Another words can the ampacity of your cables be less then the rating of the breaker, or does the breaker always have to be equal to or less than the cable ampacity to protect the cables?
Just for example sake, if I had the 185A load and I selected cables with an ampacity of 185A could I use a feeder breaker of 185A if one was avaliable hypothetically speaking?
Thanks
Mull982
Just for example sake, if I had the 185A load and I selected cables with an ampacity of 185A could I use a feeder breaker of 185A if one was avaliable hypothetically speaking?
Thanks
Mull982