My Go Tag A Long camper (GTAL) originally had one 15 amp AC circuit powering 4 interior lights and 2 outlets. The only 12V DC in the camper is a small light over the dinette table and one in the bathroom and these only work when hooked to the towing vehicle (no provisions for a battery).
Then at some point a PO added a panel with 2 15-A breakers. Makes sense as most campgrounds these days will have at least a 30A hookup. I got a Marinco 30A inlet and I'm almost done installing it. The inlet will be wired to supply both 15A breakers. One breaker will be for the existing trailer circuit ( 4 lights and 2 outlets). I'll probably use 30W bulbs so even with all bulbs on, I'll still have 14A for the outlets.
The other breaker will have a new circuit wired to the small 120V AC water heater that came with the camper (not original but small enough to fit under the dinette seat with the tank and pump). The water heater is 1200W so pulls 10A at 120V leaving about 5A available on that circuit when the heater is on (not all the time). I'll put a switch on the circuit before the heater.
I bought a used power converter (120V AC to 12V DC) from a wrecked trailer. I want to install this to power the water pump, fantastic vent fan, and eventually to charge a battery when I add that too. The converter label says is pulls 6A AC and has an output of 30A DC.
So finally my question...should I put the converter on the same circuit as the water heater on the assumption that the water won't be on all the time and the converter won't be pulling it's max of 6A all the time? Seems that I will have 4-5A available even when the heater is on.
I don't expect the converter output to be very much most of the time (pump and fan) so I think this means that the AC draw will not approach the 6A capability. The exception is that I don't know how high the AC amperage draw will be when it's trying to charge a battery.
Thanks for the advice.