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Old 03-25-2012, 10:57 PM   #31
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Re: Brian's 1991 International Thomas In Progress...

50 Amp service provides two 110v lines that are 180 degrees out of phase to each other. Essentially you get two 110v lines, each of which can provide 50 amps of service. The 50 amp cord has four prongs, a ground, a neutral, and two hot wires. If you connect between the two hot wires, you will see 220v due to them being 180 degrees out of phase. This is correctly wired and will run things such as electric ranges and dryers such as found in the larger manufactured coaches. 50A to 30A adapters just use three of the wires, ground, neutral, and one hot wire, giving you 110v.
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Old 03-25-2012, 11:03 PM   #32
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Re: Brian's 1991 International Thomas In Progress...

Just to be obnoxious, but I'd call it 240/120 VAC split phase, not 180 out. Anyone know better?
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Old 03-25-2012, 11:14 PM   #33
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Re: Brian's 1991 International Thomas In Progress...

Yes! Now we've got it! 2 110 wires! Just usually not used at the same time. Although I'm seriously looking at the on demand water heaters wich I'll make full use of both of them wires! The red one and the black one! (and of course the white and green)
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Old 03-25-2012, 11:43 PM   #34
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Re: Brian's 1991 International Thomas In Progress...

Quote:
Originally Posted by gbstewart
looking good, have bolted down the furnature ? our are you going to leave them lose?

keep up the good work

gbstewart

Going to leave them lose... its a bit of a rollercoaster ride if you go over a pot hole with the back tire, but otherwise its nice to be able to shift them around a few inches here and there.
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Old 03-25-2012, 11:47 PM   #35
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Re: Brian's 1991 International Thomas In Progress...

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Originally Posted by bus-bro
Just to be obnoxious, but I'd call it 240/120 VAC split phase, not 180 out. Anyone know better?

You're so funny! I'm afraid I don't know which label is proper, but I'm guessing the answer is "Yes!" That's it, you're going to MC the next get together. These are the jokes folks... we're here all week.
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Old 03-26-2012, 11:30 AM   #36
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Re: Brian's 1991 International Thomas In Progress...

Quote:
Originally Posted by jkindt
50 Amp service provides two 110v lines that are 180 degrees out of phase to each other. Essentially you get two 110v lines, each of which can provide 50 amps of service. The 50 amp cord has four prongs, a ground, a neutral, and two hot wires. If you connect between the two hot wires, you will see 220v due to them being 180 degrees out of phase. This is correctly wired and will run things such as electric ranges and dryers such as found in the larger manufactured coaches. 50A to 30A adapters just use three of the wires, ground, neutral, and one hot wire, giving you 110v.

Just curious.... on the adapters from 50A down to the smaller ones.... Do they internally run a jumper between the 2 pins/holes that would have otherwise both been hot? Because the breaker box is wired A,B,A,B etc. if there wasn't some kind of a jumper or something then, only half your outlets would have power when adapting down. So, is it an internal jumper within the adaptor plug or is it accomplished some other way?
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Old 03-26-2012, 12:08 PM   #37
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Re: Brian's 1991 International Thomas In Progress...

No jumper just uses 1 leg. If lots of adapters used in the park it has a tendency to unbalance the supply becuse it only uses one leg. As is this is 50 amps avalible but not useable because of the 30 amp limiting circuit breaker. Oh and just for fun 180 out and split phase are the same just different names.

Chuck

PS. dont know why anyone would wire for 30 amps only, cost?
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Old 03-26-2012, 03:16 PM   #38
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Re: Brian's 1991 International Thomas In Progress...

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PS. dont know why anyone would wire for 30 amps only, cost?
How many 50amp public campgrounds have you been in? Me... since 1979.... 0. We wired 30 amps. But that's probably wrong too.
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Old 03-26-2012, 03:42 PM   #39
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Re: Brian's 1991 International Thomas In Progress...

Screw convention, I'm set up for 60 amps!

I set my electric up as a dual 30 amp system with 2 breaker boxes, each servicing different appliances/outlets. One can either work as a sub-panel of the other for a total of 30A distributed throughout the bus, or they can work independently so I can plug into two different outlets and pull up to 30A from each for a total of 60A. Most likely situation is I have a 50 amp service and so I plug one box into the 30 amp outlet and plug the other box into the 20 amp outlet and get to use a total of 50 amps. Or, I'm in someone's driveway and can plug into two separate 15A or 20A outlets and be able pull in a total of up to 40A. Also, I have the flexibility to plug in to one 30A outlet 75 feet away by stringing all three of my 30A cords together, or if I'm close enough I can use a combination of cords to plug into whatever combination of outlets I have available. I just like to have the flexibility to harness maximum power in diverse situations. Plus I got a great deal on the three 30A cables!

Here is a pic of my system: viewtopic.php?f=9&t=4959&start=180


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Old 03-26-2012, 07:00 PM   #40
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Re: Brian's 1991 International Thomas In Progress...

I wired for 30amp , unless you have a high electric demand stove hotwater tank etc , 30 amp should be plenty, all the parks that i have been in where 30 amp, some had both. you can buy a adaptor 50amp-30amp if need be(im going to get one just incase) also most generators have a 30 amp rv plug(mine does) nice to have.

just my 2 cents

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