powerplay
Senior Member
- Location
- In front of a computer.
I have been asked to replace an existing 3 pole 50amp QBH Breaker with an 3 pole 40amp Breaker in an Sylvania Electrical Panel. The Rooftop is going to gas heat to reduce energy used and direct it to another purpose. I hadn't found an new Three Phase Breaker, and was wondering if there are any issues with using an old QBH Breaker? ...should I use the 50amp to avoid nuisance tripping on the old breaker, since the load will only draw so much and the and the cable is properly protected by the Breaker anyways? I see maximum overcurrect protection on nameplates, but if Conductor protected are there any safety issues on Air Conditioners with larger Breakers? ...Thanks again!