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Old 07-23-2019, 06:01 AM   #1
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1981 31' Excella II
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Good Home Power Hookup Solution

We recently bought 44 acres in TN and we have an SOB and the 31 ft Excella II up there. I have 50A going to the SOB which only has one AC so it can easily run off half of that 50A from 220V 50A coming in. The PO had rigged the power pretty bad and instead of jury rigging something that was already unsafe I decided to find a solution that would allow me to connect both trailers. I ended up with this distribution box which can handle the power I need. It comes with 3 recepticles, 220V 50A, 120V 30A, and 120V 20A. It has position for 4 more breakers for expansion. I think it is rated at around 100A so you could potentially run even more stuff off it.



https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


I plan on turning everything on in the SOB that one might need and check each leg of the 220V coming in to see which leg has the least load on it. I would then connect the 30A plug to the Airstream to the leg with the least load on it. I will also measure voltages to see where I am at there.



Perry
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Old 07-23-2019, 06:33 AM   #2
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That box looks to be a good plan.
I'd try to stop thinking in terms of 220v. 50 amps.
Although that's how the box is wired, the trailers never see that.
Instead, the trailers see (2) 50 amp 120 v circuits.

220v. is derived by taking the two "hots" as a circuit along with a neutral and ground. Nothing in an Airstream is used that way.
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Old 07-23-2019, 08:54 AM   #3
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I am aware. I have not seen anything run off 220V but maybe some of the big bus chassis RV's or those monster 5th wheels might actually use the 220V. I think two 50A circuits is more than enough for these two trailers.



Perry



Quote:
Originally Posted by Mollysdad View Post
That box looks to be a good plan.
I'd try to stop thinking in terms of 220v. 50 amps.
Although that's how the box is wired, the trailers never see that.
Instead, the trailers see (2) 50 amp 120 v circuits.

220v. is derived by taking the two "hots" as a circuit along with a neutral and ground. Nothing in an Airstream is used that way.
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Old 07-23-2019, 09:11 AM   #4
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Do you know any engineers who might be willing to review your plan?

Just kidding - it looks robust.

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Old 07-23-2019, 09:28 AM   #5
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Quote:
Originally Posted by Mollysdad View Post
That box looks to be a good plan.
I'd try to stop thinking in terms of 220v. 50 amps.
Although that's how the box is wired, the trailers never see that.
Instead, the trailers see (2) 50 amp 120 v circuits.

220v. is derived by taking the two "hots" as a circuit along with a neutral and ground. Nothing in an Airstream is used that way.

I think the proper terminology (to eliminate any confusion for an electrician wiring it all up) for the 50A circuit is 120/240V 50A. 220V 50A could imply no neutral. 120/240 clearly requires a neutral. If it is 120V line to neutral it is 240V line to line.


Al
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Old 07-23-2019, 12:00 PM   #6
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Just you and me.



Perry



Quote:
Originally Posted by TomW View Post
Do you know any engineers who might be willing to review your plan?

Just kidding - it looks robust.

Tom
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Old 07-23-2019, 12:02 PM   #7
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The supply line is 6/3 Romex with a ground.



Perry



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Originally Posted by Al and Missy View Post
I think the proper terminology (to eliminate any confusion for an electrician wiring it all up) for the 50A circuit is 120/240V 50A. 220V 50A could imply no neutral. 120/240 clearly requires a neutral. If it is 120V line to neutral it is 240V line to line.


Al
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Old 07-23-2019, 12:07 PM   #8
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. . . for how long a run?
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