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Old 02-23-2013, 10:23 PM   #11
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Originally Posted by Dave_Monica View Post
I have a question for those that have 50A service in your camper. How many 120V AC circuits are wired in the camper? Hopefully, the answer is more than 2 circuits.

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Everything to the left of the main breaker is on 1 of the 120 volt circuits.
Everything on the right of the 50 amp is on the other 120 volt circuit.
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Old 02-23-2013, 10:38 PM   #12
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Originally Posted by Dave_Monica View Post
What I'm trying to determine is the number of 120V circuits for the duplex plugs for coffee maker, heaters, etc. Our camper with 30A service has 2 such circuits...I was wondering if a camper with 50A service (100A @ 120V) has more than 2.

Dave
Dave, I'm assuming a TT is much like a boat in wiring. I have had several boat with 50amp connections. The 50 amp is supplies at 220volts. The 220 volts comes into the boat on leg A and leg B. Each leg is 110 volts at 25 amps. Each leg, A and B, will have a main breaker (25 amp) and then under each leg will be the separate 20 amp 110v breakers for each circuit.

Refer to 38FL drawing. Between the 2 hot legs is 220 volts but from neutral to each leg is 110 volts. Each 110 volt leg is at 25 amps.

The problems always arise in how the legs are wired. To many high draw items on one leg (hot water heater, a/c, blow dryer, electric stove) will trip the breaker on that line.

So, I guess I am saying you can many duplex sockets on each leg but it depends on what you plug in will determine if it pops the breaker.

Also, still only 50 amps total, 25 amps each 110 leg. Hope this helps..

Just for future reference Amps = watts/volts. So a 1100watt hair dryer draws on a 110v line.
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Old 02-23-2013, 10:40 PM   #13
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Everything to the left of the main breaker is on 1 of the 120 volt circuits.
Everything on the right of the 50 amp is on the other 120 volt circuit.
Dave, if you notice on Iggy's post the 50 amp breaker is actually two 25 amp breakers ganged together.
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Old 02-23-2013, 10:47 PM   #14
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Dalford,
wrong. There are two 50-amp circuits. Not 25. Haven't you ever looked at a campground 50-amp service box?

Dave, there are about 8 breakers in my TT, so about 8 circuits. Not sure if they're split evenly across the two 120 lines or not.
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Old 02-23-2013, 10:59 PM   #15
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Dave, if you notice on Iggy's post the 50 amp breaker is actually two 25 amp breakers ganged together.

No they are two 50 amp breakers.
One for each hot 120 volt leg
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Old 02-23-2013, 11:03 PM   #16
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Dalford,
wrong. There are two 50-amp circuits. Not 25. Haven't you ever looked at a campground 50-amp service box?

Dave, there are about 8 breakers in my TT, so about 8 circuits. Not sure if they're split evenly across the two 120 lines or not.
Haven't really paid attention to them since mine is a 30 amp but I am pretty sure it is still just a bigger connector with 4 conductors. Two 120 volt, 25 amp legs, neutral and ground.

I guess if it is a 100 amp they should call it 100 amp. When you rent a site they ask, do you need 30 amp or 50 amp. Not 100 amp.

My boat has 2 legs at 30 amps each. Each leg has about 8 breakers on them. When I connect to 50 amp pedestal with my T I end up with 25 amps on each leg at 110 volts each.

Barry, look at your 50 amp breaker and see of it is two 50 amp breakers ganged together or two 25 amp breakers ganged together.
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Old 02-23-2013, 11:05 PM   #17
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Thanks Iggy's, I guess boats are different than RV.. I am surprised though...
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Old 02-23-2013, 11:13 PM   #18
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Thanks for the replies. I would have hoped that they would have wired 4 circuits (2 on each leg) for outlets for appliances but it doesn't appear so.

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Old 02-23-2013, 11:18 PM   #19
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Learn something new each day. I was wrong about the amps on each leg but did find an excellent article that is good reference for rv electrical wiring in general..

RV Electrical Systems
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Old 02-23-2013, 11:52 PM   #20
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While we're on the subject of inputs to the RV, I just ran across this Surge Protector comparison, and it was an eye opener.

It appears to me that for 50 Amp service, the Progressive Industries is a clear winner. And this site had the best price I could find also.

RV Surge Protector Comparison

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