Forum Discussion
BFL13
Jul 08, 2013Explorer II
"Now I need to find out what an AC BRANCH BREAKER is. There are 3 breakers in there, each with two little switches. There was a black wire coming out of the bottom of the center breaker and it was joined to two other wires with a short piece and one of those yellow wire connectors"
The branch circuit breaker fits onto a "buss bar" at the top where it gets its 120v power from the main breaker end of the buss. Each "branch" has its own "circuit" like "receptacles", "galley receptacle", "converter", "air conditioner", etc.
Sometimes there are more circuits than breakers, so they have to share. With a 7155 (or 7355) they often have the converter share with the receptacles. This means two black wires going into the bottom of the same circuit breaker.
Where you see two other black wires joined with the one to the same circuit breaker, now three circuits are sharing the same breaker.
The instruction to only use one with one is all very nice, but you can just go with how your rig was built in the first place. Except---
If you want to be able to run the receptacles off an inverter AND turn off the converter, as you must if the shore power cord is plugged into the inverter, then you can choose a different circuit breaker for the converter so you can shut that off and still have the receptacles live.
If you haven't, then you should verify the circuits named for each breaker on the label. Not unusual for them to be mislabelled. Make ink correction. :( "Know your rig"
The branch circuit breaker fits onto a "buss bar" at the top where it gets its 120v power from the main breaker end of the buss. Each "branch" has its own "circuit" like "receptacles", "galley receptacle", "converter", "air conditioner", etc.
Sometimes there are more circuits than breakers, so they have to share. With a 7155 (or 7355) they often have the converter share with the receptacles. This means two black wires going into the bottom of the same circuit breaker.
Where you see two other black wires joined with the one to the same circuit breaker, now three circuits are sharing the same breaker.
The instruction to only use one with one is all very nice, but you can just go with how your rig was built in the first place. Except---
If you want to be able to run the receptacles off an inverter AND turn off the converter, as you must if the shore power cord is plugged into the inverter, then you can choose a different circuit breaker for the converter so you can shut that off and still have the receptacles live.
If you haven't, then you should verify the circuits named for each breaker on the label. Not unusual for them to be mislabelled. Make ink correction. :( "Know your rig"
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