Generator Transfer Switch Breaker Size Question

[maxime]

Hi everyone! I have a generator transfer switch connected to my main panel and to a generator inlet box. From the Main panel to the transfer switch, when on utility power, I'm using a 60A breaker in the main that feeds a 60A breaker in the transfer switch. When on generator power, we switch the transfer switch over to the generator "main" breaker in the transfer switch which is a 30A and the generator feeds the 30A breaker through the generator inlet box.

My questions:

1. Is it okay to install a bigger branch breaker (40A) in the transfer switch than the "main generator" 30A transfer switch breaker? or should I limit the maximum size of any single branch breaker to 30A?
2. I have a heat pump that uses a 40A breaker in the main panel. I want to move that branch circuit to the transfer switch. Can I install a 40A breaker in my transfer switch even if the generator "main" in my transfer switch is a 30A? If I do that, will I be able to run the heat pump with my generator when utility power is down?

Heat Pump info based on nameplate (it's a split system with 4 inside head units - 48K total):

• The rated input current of the heat pump is 26A
• Minimum circuit ampacity is 40A
• Max fuse is 60A

Thanks a lot!

Max.

 

[tom baker]

We are not allowed to assist DIYers per forum rules. You will need to find an electrical contractor.