Originally Posted by ChipBruce
Question about the adapter plug from a newbie: Does the adapter plug simply allow the 30 amp trailer to plug into the 50 amp pedestal leaving the power level at 50 amps, or does it reduce the power level from 50 amp to 30 amp as well? I just want to be safe with my toy hauler.
Yes, when using the adapter of this type, you would be able to possibly have 50 amps from the power pedestal to your RV's power distribution box (where all the RV's subcircuits get their power from). However, the distribution box is protected by it's own 30 amp circuit breaker (in theory, as breakers don't always trip when you think they should).
If you created an overload in your RV, then if it's distribution box main breaker trips, then all is good. However, if it doesn't then you can't expect the power pedestal breaker to trip until it exceeds 50 amps....... which your RV's 30 amp cord may have melted by that time.
However, this is an extreme scenario, and most likely won't occur. If you keep it all under 30 amps in your RV, or even if you exceed it, your RV main breaker would need to fail too for usually a dangerous situation to occur.
The only thing that won't be protected by a 30 amp circuit breaker is the power cord itself. Hopefully everything in the RV will be protected by the 30 amp main breaker in the RV.
I use these adapters a lot myself. Many of the 30 amp pedestal outlets at the state parks I frequent are worn or bad. I just use the adapter and plug into the 50 amp outlet and am good to go....since the 50 amp outlets are used less frequently and are usually in better shape.