main fuse

TLMSJM said:
Where are these breakers? I have owned 15 different RVs, and everyone except this one had either a 30, or 50 amp MAIN fuse.
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I’ve worked on a lot of RVs starting in 1984, and never seen one with a fuse for the shore power system.
 
TLMSJM said:
Where are these breakers? I have owned 15 different RVs, and everyone except this one had either a 30, or 50 amp MAIN fuse.
Click to expand...
Fuses have nothing to do with 110 power.

Yes, there are main fuses, for the 12 volt system and on the converter.

If you are having trouble with the battery taking a charge, then maybe the converter fuses are blown.
 
TLMSJM said:
Where are these breakers? I have owned 15 different RVs, and everyone except this one had either a 30, or 50 amp MAIN fuse.
Click to expand...
Again, there are no fuses in the 120VAC electrical system (and I've never seen an AC fuse in any RV I've owned). The main circuit breakers are in the power distribution panel.

Rob
 
TLMSJM said:
Yes, I know, I asked about a MAIN fuse or breaker that would controll the entire 110 volt system.
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This is a photo of my 120 panel. You can see the 2 main CBs are labeled as such; one for each leg of my 50 amp system. Tripping the main on either side cuts power to the whole leg. Tripping one of the CBs only cuts power to that branch circuit.

I don't know what a 22MLE has for a power panel. But I would suspect there is either one 30 amp main breaker that feeds the individual branch circuit CBs or 2 50 amp breakers if you have a 50 amp system.

The shore power would normally go directly from your shore power connector on the outside to the 120v breaker panel. Sometimes the DC panel is also in the same power box (you can see mine at the very top of the photo - one of my fuses is pulled so the red light for that 12v circuit is glowing).

1727891759976.jpeg
 
traveldawg said:
This is a photo of my 120 panel. You can see the 2 main CBs are labeled as such; one for each leg of my 50 amp system. Tripping the main on either side cuts power to the whole leg. Tripping one of the CBs only cuts power to that branch circuit.

I don't know what a 22MLE has for a power panel. But I would suspect there is either one 30 amp main breaker that feeds the individual branch circuit CBs or 2 50 amp breakers if you have a 50 amp system.

The shore power would normally go directly from your shore power connector on the outside to the 120v breaker panel. Sometimes the DC panel is also in the same power box (you can see mine at the very top of the photo - one of my fuses is pulled so the red light for that 12v circuit is glowing).

View attachment 111113
Click to expand...
Thank you
 
traveldawg said:
This is a photo of my 120 panel. You can see the 2 main CBs are labeled as such; one for each leg of my 50 amp system. Tripping the main on either side cuts power to the whole leg. Tripping one of the CBs only cuts power to that branch circuit.

I don't know what a 22MLE has for a power panel. But I would suspect there is either one 30 amp main breaker that feeds the individual branch circuit CBs or 2 50 amp breakers if you have a 50 amp system.

The shore power would normally go directly from your shore power connector on the outside to the 120v breaker panel. Sometimes the DC panel is also in the same power box (you can see mine at the very top of the photo - one of my fuses is pulled so the red light for that 12v circuit is glowing).

View attachment 111113
Click to expand...
You state that one breaker for each leg of the 50amp system. Looking at the picture would make a non-electrical person think that one main goes to the top breakers and one main goes to the bottom breakers but I know that is not the case. When I am hooked up to 30amps I have power to everything in the rv. Can anybody explain this in basic terms? Just looking to increase my minimal knowledge and maybe others can learn also.
 
My understanding: when you use an adapter to plug a 50 amp rig into a 30 amp supply the single hot wire of the 30 amp supply is connected in the adapter to both 50 amp legs.
Thus either leg can draw up to 30 amps, but the sum of the two legs cannot exceed the 30 amps available without popping the circuit breaker on the 30 amp supply - as most of us have done more than once.
 
SailingOn said:
My understanding: when you use an adapter to plug a 50 amp rig into a 30 amp supply the single hot wire of the 30 amp supply is connected in the adapter to both 50 amp legs.
Thus either leg can draw up to 30 amps, but the sum of the two legs cannot exceed the 30 amps available without popping the circuit breaker on the 30 amp supply - as most of us have done more than once.
Click to expand...
That is partially correct. The 30 amp adapter connects to only one leg of the 50 amp service which it then uses to feed the 30 amp circuit.
 
"When I am hooked up to 30amps I have power to everything in the rv. Can anybody explain this in basic terms?"

It is simple. The 30 amp leg is split inside the adapter and connected to both legs of the 50 amp panel. Either leg can use all 30 amps or the 30 amps can be shared between the two legs but the total available is only 30 amps.
 
"The 30 amp adapter connects to only one leg of the 50 amp service which it then uses to feed the 30 amp circuit."

"The 30 amp leg is split inside the adapter and connected to both legs of the 50 amp panel."

Both are correct, but are looking at the 30A-50A conversion from opposite sides. I have a trailer with 50A service. If I plug into a 50A outlet, both legs have up to 50A of current available. If I use an adapter (dog bone) to connect to a 30A outlet, the dog bone connects both lets of the 50A service to that single 30A circuit. Each leg of my trailer has up to 30A of current available, and the sum of the two legs can't exceed 30A.

Our first trailer had 30A service. I once used a dog bone to connect to a 50A outlet. Only one leg of that outlet was used, but there was 50A available to the trailer. The trailer's shore power cord was only rated for 30A, so I was taking a bit of a risk there, but the trailer's electrical panel had a 30A main breaker, so I could still pull only 30A. Had something gone wonky in the shore power cord itself I would have had a bit of a problem, as the wires couldn't handle the 50A they could have gotten before the pedestal breaker tripped.
 
Murphy's law, of course, says if you plug your 50 amp rig into a 30 amp supply, sometime later you will forget, plug in both space heater and microwave and pop a breaker.
AND the breaker will not be on your post, it will be somewhere several rigs away, on the other side of a pole, behind a rusty stubborn door, and it will be dark; been there.
 
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