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Old 07-30-2014, 10:53 AM   #15
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I printed out the schematic for a 50Amp set up for the electrician I hired to install a 70 Amp box outside for our MH. The box with breakers cost approx. $90 from Home Depot and the electrician charged me $120 to install. He was glad I had printed the wiring schematic for a 50 AMP RV plug. Regardless, it works great and have been hooked up to it since June and we can use the 20 amp plug for outside activities. Best of luck.
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Old 07-31-2014, 08:27 AM   #16
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Quote:
Originally Posted by Gary RVRoamer View Post
Make sure the electrician understands the RV 50A/240v requirement, i.e. that it must be a 4-wire (2 hots, a neutral and a ground) system. It is perfectly OK if you keep the present 40A/240v power source (it doesn't have to be 50A), but the neutral is absolutely required. Most likely the present welder outlet is a three slot receptacle and does not have a neutral, so one will have to be added. That could get expensive if pulling a new wire is difficult.

No wonder I couldn't find a neutral feed.
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Old 08-05-2014, 05:19 PM   #17
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If the current outlet is a 220VAC with ground (three wire). Using what you have the easiest (and cheapest) conversion is to phase the red wire to white (wrap with white electrical tape the entire exposed length-or paint it white) and move it in the breaker box from the existing 40amp breaker to the neutral bar. Then install a 30 amp single breaker and a matching 30 amp 120v outlet.

No new wires required and phasing a colored wire white is legal by the NEC. Then you have hot neutral and ground. It is a 30 amp capable coach correct?

Its easy to identify the neutral bar in the panel board. Its the one with all the white wires on it
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Old 08-05-2014, 07:16 PM   #18
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Hire an electrician. Put in a new cable with 4 wires.


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Old 08-05-2014, 07:26 PM   #19
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I agree and I'm an electrician. My point was the OP wanted to "convert" 220 amp outlet to a 30 OR 50 amp RV outlet.

It is perfectly fine to use what he has and re-purpose it for a perfectly legal 30 amp RV hookup. If he wants a new outlet he can choose the configuration he wants but a four wire outlet is not required for a 30amp 120VAC RV. He can have a 30 amp hookup with whats in place.
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Old 08-07-2014, 10:00 PM   #20
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Originally Posted by Fl_Richard View Post
I agree and I'm an electrician. My point was the OP wanted to "convert" 220 amp outlet to a 30 OR 50 amp RV outlet.

It is perfectly fine to use what he has and re-purpose it for a perfectly legal 30 amp RV hookup. If he wants a new outlet he can choose the configuration he wants but a four wire outlet is not required for a 30amp 120VAC RV. He can have a 30 amp hookup with whats in place.
Fastest and easiest. I use a 30 amp at home with no difficulty. No need for both AC when we're not out in the sun.
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Old 08-08-2014, 10:30 AM   #21
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We have 50 amp coach with 4 x 10 wiring from panel to outlet.

But instead for us we had a contractor 3 x 10 cord with twist lock gor 120 v service from yard sale along with the 50 amp twist lock for coach end also yard sale so for driveway storage we use "special cord" to operate at 30 amp limit.

Total investment about $8.00.

Had correct outlet but 50 amp cord too short and large for this use.

Real easy to pull the special cord and toss it in the garage and go.
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