Experts help...Wiring Query on 1976 Coleman

[Brantime]

Greeting!

I recently purchased a 1976 Coleman Gettysburg and I have a wiring question for you that are in the know!!! (I am not, lol)

The setup: A 30 amp main service wire comes out of my trailer...it has a standard 110v plug on the end of it, but also has a 12", 220v adapter (110v to 220v) with it. The wire comes into the trailer into a breaker box where there are two 20 amp breakers. (One breaker has a short piece of wire with a metal 4way wired direct)

The question: Would both of these 20 amp breakers be 110v? (110v from each side of the 220v)?

Would the easiest way to check be simply plug into a 220v plug and then check each breaker with a voteage meter?

Thanks for any help here, lol!

[tlhdoc]

NO the breakers will not each run off of one side of 220 volt power.  I have never heard of a PU with 220 volt power.  If you plug the camper into a 220 line I think you will fry the electrical side of the camper.  I need a little more information in order to figure out what you have.  A Coleman PU (in the USA and at least back to the mid-80s) came with a 30 amp cord and a 30 amp plug on the end.  The 30 amp plug has  2 angles prongs near the bottom and a pin at the top.  You posted that your trailer has a standard 110 plug on it.  Does it look like the plug was replaced?  Many be in the 70's a 15 amp plug was standard.  The 12 inch adapter that you have.  What does the plug end look like and what does the receptacle end look like?

[wavery]

The 12" adapter plug is probably for plugging your 30A trailer cord into a 20A 0r 50A service outlet at some campgrounds. It is 90% assuredly NOT for 220V.

[mike4947]

Back in the 70's 15 amp shore power service was the norm. The converters came with a single 15 amp breaker and were normally rated for between 6 and 15 amps DC output.

Sounds like someone has replaced the original converter with a more modern one. The 2 20 amp breakers are a give away. BUT they didn't replace the 15 amp shore power cord/plug with an uprated 30 amp cord/plug.
Problem you have is your breakers in the trailer are capable of handling 40 amps. The shore power cord is capable of handling 15 amps.
If you use the dogbone adapter (most likely 30 amp male with 15 amp female) then the shore power can send up to 30 amps through your 15 amp cord...NOT a good thing.