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06-29-2022, 03:55 PM
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#1
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Senior Member
Join Date: May 2016
Location: Prescott Az.
Posts: 331
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can i use house 30 amp
Hello all, mu son in law is wanting to put in a 50 amp outlet on the side of his house. he has a dryer outlet in the house not being used, its a 30-amp it has 4 wire, r b w g, it has a 30-amp breaker.
can he hook the 4 wires to the 50-amp outlet and be safe? doesn't the 4-wires make it 220? is the rv 50-amp 220.
any ideas what to do?
thnx
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Pat and Shelley C.
Prescott Valley Az.
2007 H R Endeavor 40 PDQ, 2023 Colorado Z71
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06-29-2022, 03:59 PM
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#2
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Senior Member
Join Date: Jul 2020
Posts: 820
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Having just gone down this road, it’s really about the gauge and not number of wires. 50 amp needs a heavier gauge wire. That and putting a 50 amp outlet on a 30 amp circuit break still gives you 30 amps.
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2018 Phaeton 44OH
2023 Chevy Traverse Toad
Florida
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06-29-2022, 04:06 PM
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#3
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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Quote:
Originally Posted by gweedo295
Hello all, mu son in law is wanting to put in a 50 amp outlet on the side of his house. he has a dryer outlet in the house not being used, its a 30-amp it has 4 wire, r b w g, it has a 30-amp breaker.
can he hook the 4 wires to the 50-amp outlet and be safe? doesn't the 4-wires make it 220? is the rv 50-amp 220.
any ideas what to do?
thnx
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I believe technically 220 but not. I think your 2007 one hot leg does half your motorhome and the other hot leg does the other half. I don’t believe your panel has the capabilities to offer 220 breakers. You could use your 4 wire but your only going to get 30 amps.
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2007 Fleetwood Revolution LE 40V
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06-29-2022, 04:56 PM
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#4
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 2,698
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Quote:
Originally Posted by gweedo295
can he hook the 4 wires to the 50-amp outlet and be safe? doesn't the 4-wires make it 220? is the rv 50-amp 220.
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Unless the connection somehow disrupts space-time in the neighborhood the 4 wires will be 240V, not 220V - the standard was changed way back in 1967.
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Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2020 Jeep Gladiator Sport S or a 2022 Jeep Wrangler Unlimited (JLU) Sport S
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06-29-2022, 05:09 PM
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#5
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Senior Member
Join Date: Jul 2005
Posts: 5,996
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Do not upgrade the 30 amp breaker. It protects the 30 amp wiring to the dryer receptacle. Just be aware that the RV will only be able to draw 30 amps on each leg rather than the full 50 amps.
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TandW
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06-29-2022, 05:16 PM
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#6
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Member
Join Date: Jul 2018
Posts: 36
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If you have a 30 amp old dryer receptacle, switch out the 30 amp 2 pole breaker with a single 30 amp and install a 30 amp RV receptacle. Then use a 30 to 50 amp dog bone adapter to power your rig. That will allow you to use most of your rig's appliances, AC, that sort of thing. You might be able to run two AC units. If you try to wire up a 50 amp outlet with the wrong gauge wire it will at the very least be a code violation and at worst start a fire if you aren't careful.
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06-29-2022, 05:24 PM
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#7
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Senior Member
Ford Super Duty Owner
Join Date: Mar 2009
Location: Oregon
Posts: 2,757
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It seems as I recently saw somewhere somebody asking the same question about putting a 30 amp breaker on a fifty amp outlet. IIRC it is not allowed by code due to that later on someone could come along and change the breaker not knowing the wire is undersized thus creating a potential problem. I would be interested in what a qualified sparky has to say.
Does he need a 50 amp? It could easily be converted to 120 volt 30 amp.
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2016 Bounder 34T Anniversary Edition
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06-29-2022, 05:31 PM
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#8
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Senior Member
Join Date: Nov 2017
Location: Back Woods of NC
Posts: 1,449
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Careful with the dog bone! I ran 2 ACs off a dog bone for a while. Everything seemed ok until I tried to pull the dog bone apart. The 50 had arced and welded itself to the 30.
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2012 Newmar King Aire + 24' Stacker = 74' of Chaos!
We usually have our 4 dogs with us - 2 Labs, 1 Chihuahua / Pug & 1 Corgi / Pappillon
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06-29-2022, 05:40 PM
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#9
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Senior Member
Join Date: Jul 2014
Posts: 35,439
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You can do it, just don't upgrade the circuit breaker, without upgrading the wiring..
50 amp 120/240 service has the potental to supply 100 amps at 120 volts.
30 amp 120/240 volt service, your dryer service, has the potential of 60 amps at 120 volts, plenty of power for your RV.
A standard 30 amp RV outlet is 120 volts only so it can only supply 30 amps.
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06-29-2022, 05:43 PM
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#10
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Senior Member
Join Date: Jul 2014
Posts: 35,439
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Quote:
Originally Posted by Tha_Rooster
I believe technically 220 but not. I think your 2007 one hot leg does half your motorhome and the other hot leg does the other half. I don’t believe your panel has the capabilities to offer 220 breakers. You could use your 4 wire but your only going to get 30 amps.
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He will get 30 amps on each hot leg.
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06-29-2022, 05:44 PM
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#11
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Senior Member
Join Date: Jul 2014
Posts: 35,439
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Quote:
Originally Posted by scott2020
If you have a 30 amp old dryer receptacle, switch out the 30 amp 2 pole breaker with a single 30 amp and install a 30 amp RV receptacle. Then use a 30 to 50 amp dog bone adapter to power your rig. That will allow you to use most of your rig's appliances, AC, that sort of thing. You might be able to run two AC units. If you try to wire up a 50 amp outlet with the wrong gauge wire it will at the very least be a code violation and at worst start a fire if you aren't careful.
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That's a big step down from 120/240 volt 30 amp service.
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06-29-2022, 05:48 PM
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#12
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Registered User
Join Date: Jan 2021
Posts: 2,184
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Quote:
Originally Posted by gweedo295
Hello all, mu son in law is wanting to put in a 50 amp outlet on the side of his house. he has a dryer outlet in the house not being used, its a 30-amp it has 4 wire, r b w g, it has a 30-amp breaker.
can he hook the 4 wires to the 50-amp outlet and be safe? doesn't the 4-wires make it 220? is the rv 50-amp 220.
any ideas what to do?
thnx
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Is there any reason that appropriately sized wires can’t be pulled from the main panel to the desired outside location? If space is unavailable in the main panel for a 50A breaker, the unused 30A can be removed.
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06-29-2022, 06:13 PM
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#13
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Member
Join Date: Jul 2018
Posts: 36
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Quote:
Originally Posted by twinboat
That's a big step down from 120/240 volt 30 amp service.
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True. In my rig, the power control would see something like this as a 50 amp service automatically. I think a person with a similar setup would need to force the power control to 30 amps. When I did something similar, 30 amp 120 volt was enough to run 1 AC, fridge, lights, etc just enough to get by. I felt it was the safest option but I have to keep in mind not to run too much.
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2014 Fleetwood Bounder Classic 36H
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06-29-2022, 06:27 PM
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#14
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,750
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Quote:
Originally Posted by KenZ71
Careful with the dog bone! I ran 2 ACs off a dog bone for a while. Everything seemed ok until I tried to pull the dog bone apart. The 50 had arced and welded itself to the 30.
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Yeah, two of these rooftop AC's aren't happy with 30A, and the small prongs on the plugs suffer!
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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