I am installing a new load center with increased space for circuit breakers. This is because I have installed a new water heater with 120 volt and propane options. I need a new breaker for the water heater, but the present panel on this particular vintage, non-AS, travel trailer, does not have enough breaker spaces.
I am using a back-fed, single pole, 30 amp breaker as the main breaker.
I have read that a back-fed breaker, when used as a main, needs a retainer to prevent removal. I cannot imagine attempting to remove that 30-amp breaker under any circumstances. (However, on some residential panels, the mains are designed to be pulled out of the panel.)
The retainer part number is THQPSBK, and the description is Travel Trailer Main Breaker Kit for THQP breakers.
This retainer is not available at the big box stores (but might be available on line--if in stock), and I cannot find an illustration or photo anywhere on line. A few online electrical retailers list the retainer, which may cost about 15-20 dollars after shipping.
I think I can get by without the retainer temporarily (or permanently), but I would appreciate hearing from those with more experience.
I enjoy the wonderful, usually clear and correct, information on these forums.
I am a machinist--not an electrician.