WFCO Circuit Breakers

They're fairly standard residential circuit breakers. According to the 8900 series manual from WFCO, the following brands and types are acceptable for main breakers:

Cutler Hammer: BR and C
Thomas Betts: TB or TBBD
ITE/Simens: QP or QT
Square D: HOM or HOMT
Murray: MP-T or MH-T
General Electric: THQL

In addition, for non-main breakers, Cutler Hammer BRD, BD, and A types are approved.

You may find you need to order a 30/20 combination breaker as that is not a commonly used combo breaker anywhere other than in RVs. An actual electrical supply house would be more likely to carry it than a home improvement store. If you have an empty space, or a single breaker for some other branch, it may be worthwhile to rejigger things so the main breaker is a non-duplex breaker.

You might want to confirm it's the breaker or wiring.

Thermal breakers do 'wear out', especially when tripped numerous times. The 'thermal' part gets weaker and trips more easily.

Thank you. Guess I'm off to electrical supply house.

Most likely Square D.. but to be sure pull the breaker (label the leads) and head off to your favorite Breaker Store
Home Depot
Lowes
Mennards
Joe's hardware
ACE
ACO
Sam's electrical supply
(SOme of the names above are generic)

I matched up some 120VAC Circuit Breakers in my WFCO Power Distribution Center from LOWES...

Roy Ken

FYI. the 30 is the main and the 20 is the A/C

I had to replace a breaker in my 7300 Parallax in the 2003 5er. It was not the same size/shape as a typical stick house breaker of the same amps. I had to take it in to do a side by each comparison to get it right. I was lucky to find a store that had that kind, not all do.

If reluctant to take it out and lose all the 120v in the Rv while away-- if it is the fridge or whatever that is a plug-in, you can use an extension cord to the pedestal, and plug the fridge or whatever in directly till you get back.

My WFCO says right on the label what breaker to use, take the front cover off.

Unless you bought a WFCO Power Center from a vendor who also sold you the breakers, they come without breakers. It's your RV manufacture who installed the breakers. That is why 4 RV's with the same PC could have different brands of breakers installed and why after electrical service, you could now have different brands in your PC.