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Old 03-09-2015, 12:06 PM   #1
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Weird Wire

First post. Just got a 79 Elandan II, a 29 footer. The power cord that comes out by the water intake line is a 220 hookup. There is a wire coming out of the roof that is cut, but looks like a 110. It's coming out of the control panel above the door. Should I try to hook it up?
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Old 03-09-2015, 12:12 PM   #2
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Welcome to the forum.
Could you post some photos?
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Old 03-09-2015, 12:25 PM   #3
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I would not hook anything up until you have your coach plugged in to 120 volt power and measure what the voltage is on the mentioned wires. There should not be any 220 volt hook-up anywhere on your coach. The most you should have is a 120 volt 30Amp hook-up. 220Volts will fry everything in that coach
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Old 03-09-2015, 12:36 PM   #4
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Yes we need photos to help-the "110" on the roof may be solar and the 220 may be a 110 at 30 amps which is a lot different that the 110/15 amp we all know. But photos will tell...
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Old 03-09-2015, 12:36 PM   #5
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Unfortunately, Winnebago's online wiring diagrams only go back to 1990. I would recommend contacting Winnebago and they may be able to provide you with the appropriate wiring diagram(s) for your coach.
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Old 03-09-2015, 12:36 PM   #6
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Thanks. I was thinking that the big plug looked weird. It looked the same shape as 220 plugs that I've seen. It must be an RV-specific plug. Sorry for the newbyness. How do I plug in the weird cord? Do I need an adapter? What do you think the smaller wire is for? it's coming out the roof above the door.
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Old 03-09-2015, 12:49 PM   #7
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if it's 3 prongs, it's called a "30 Amp" plug. If it has 4 prongs, it's a "50 Amp" connection. There will also be a label there somewhere that tells you to hook up to a 30 amp service or 50 amp service. Yes, there are conversion plug/adapters. If you have a Harbor Freight near you, they are the cheapest. Also Walmart has them. Only use the adapters to hook up to your house for charging the batteries. Don't run the rig on a 110v house plug. Not nearly enough juice to run A/C units along with Frig/Microwave etc.
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Old 03-09-2015, 01:00 PM   #8
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The plug that "looks like a 220" is actually specific to RV's. I think it's called a "30-TT", meaning 30 Amps for a "travel trailer". Don't try plugging into 220, you'll burn up a lot of things.

I liked to have our rig running some low-power stuff when it was in the driveway, like the fridge on electrical power and a trickle charger keeping the batteries charged. I had a 115V domestic to 115V TT pigtail which I bought at Camping World. As long as I didn't turn on any heavy power users, it was fine.

If we'd kept the RV, I had the harware in hand to put a weather-proof box on the outside wall of the garage with a 30TT socket. There was one breaker position in the breaker box that was originally a dedicated computer circuit to a room the builder had designated as the "den". I'd planned to disconnect the line into the house, put a 30A breaker in place of the 15A that was there and wire up a dedicated circuit for MH shore power.

I hadn't got round to installing it before we sold the MH, 4 years after I bought the bits!
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Old 03-09-2015, 01:08 PM   #9
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Quote:
Originally Posted by TonyNelson View Post
First post. Just got a 79 Elandan II, a 29 footer. The power cord that comes out by the water intake line is a 220 hookup. There is a wire coming out of the roof that is cut, but looks like a 110. It's coming out of the control panel above the door. Should I try to hook it up?
Tony,

You say the one coming out of the roof looks like a 110 cable. What do you base this on?? What is the "control panel above the door" for? Very little about electric wire is voltage dependent. One can use rubber SJ cable for anything and it makes no sense to have a power lead go out of the roof.

Another note: How many pins are on the 220 plug? If it is not 4 (three flat one round), it is not a 220 plug.

I suggest you locate someone that knows about RV electrics before you get something real wrong.

Matt
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Old 03-09-2015, 01:09 PM   #10
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30 Amp Female to 15 Amp Male RV Pigtail Power Adapter


So if I get this, I should only try turning on lights and basic stuff but not the fridge or microwave?
trying to get pics soon
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Old 03-09-2015, 02:11 PM   #11
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Well, your house line is usually 15 amp breakers. So you can run whatever you want, up to 15 amps. Lights and Frig (if it's level at your house.. don't run the frig if the unit isn't level within a couple degrees) and most of the stuff up to the a/c unit(s). Those are usually the deal killer.

Yes on the adapter. That's a 30amp to house 110v/15amp
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Old 03-09-2015, 02:40 PM   #12
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RV's normally come with one of two plugs

TT-30 is a 120 volt plug,, The outlet says 125 VOLTS max, and many electricians look at it and wire it for 220, I DO NOT recommend installing a 30 amp at home because of this.. That said I installed a 30 amp at home,, but I did it right. I'm not a professional electrician you see (Certified electroincs technician yes, Electrician no). So I understand about voltages.

The 50 amp plug has 4 pins (Prongs, 3 blades and one round one) this is a 120/240 dual voltage thing, (120 side to top 240 side to side, as normally installed).

The wire to the roof... You say it "Looks like 120 volt wire".. Romex or Zip cord.

Wires run to the roof for many things, some of which are options.

Sat domes (normally 12 volt) Flood lights (likewise) Wind sensors (Usually 4 wire, look like (but are not) telephone), Solar panels, Electric "Air" horns. and more.
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Old 03-09-2015, 07:15 PM   #13
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To be clear:

30 amp:


50 amp:
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