Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 07-08-2015, 07:01 PM   #1
Member
 
Join Date: Jun 2015
Posts: 61
How to convert 50A receptacle to 30A

I bought a house with a 50A 240 receptacle on the wall in the garage. I want to convert it for use with my motorhome which is 30 amp. Is there a converter cord or do I need to change out the wall plug to 30A? And then there is the breaker in the panel which is a problem. Its a two pole 40A each, 240Volt.
Got ideas.
__________________
Doug Michaels
2015 Solera 24W
Three big dogs
One wife
Two kayaks, One SUP
Bend, Oregon
Solera is offline   Reply With Quote
Old 07-08-2015, 07:46 PM   #2
Left Coast
 
Join Date: Dec 2014
Location: vancouver,washington
Posts: 15,649
Send a message via Yahoo to bob caldwell
There are ready-made adaptors......you should be able to find there in Bend. Also, the plug (50 amp) 240 volt can be re-wired to 120 volt. Is that breaker you've got a side by breaker...if so, get a 30 amp side by side
bob caldwell is offline   Reply With Quote
Old 07-08-2015, 08:18 PM   #3
Phat Phrog Stunt Team
 
TURBS's Avatar
 
Join Date: Aug 2011
Location: Iowa
Posts: 34,499
When done you should have one hot one ground and one neutral.

TURBS
08 duramax tuned n modded
2011 32bhok Sabre
2015 camping "11 nights"
TURBS is offline   Reply With Quote
Old 07-08-2015, 08:26 PM   #4
Site Team
 
Mr. Dan's Avatar
 
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 16,587
Quote:
Originally Posted by bob caldwell View Post
There are ready-made adaptors......you should be able to find there in Bend. Also, the plug (50 amp) 240 volt can be re-wired to 120 volt. Is that breaker you've got a side by breaker...if so, get a 30 amp side by side
Why would you need a 30 amp side-by-side? I think you need a single pole 30 amp for the single hot. All the 30 amp RV plugs I've ever seen are single pole.
__________________
FR Wildcat 295RSX / GMC Sierra

Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 28; Booked = 50
Mr. Dan is online now   Reply With Quote
Old 07-08-2015, 08:30 PM   #5
Left Coast
 
Join Date: Dec 2014
Location: vancouver,washington
Posts: 15,649
Send a message via Yahoo to bob caldwell
Just so there wouldn't be an empty hole in panel......and you couldn't test for power the redneck way!
bob caldwell is offline   Reply With Quote
Old 07-08-2015, 09:23 PM   #6
Site Team
 
Mr. Dan's Avatar
 
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 16,587
Quote:
Originally Posted by bob caldwell View Post
Just so there wouldn't be an empty hole in panel......and you couldn't test for power the redneck way!
OK, but here's hoping the OP doesn't insert a ground or neutral/common wire in that second slot!
__________________
FR Wildcat 295RSX / GMC Sierra

Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 28; Booked = 50
Mr. Dan is online now   Reply With Quote
Old 07-08-2015, 09:40 PM   #7
Senior Member
 
dannyabear's Avatar
 
Join Date: Jun 2013
Location: Baton Rouge, La.
Posts: 643
All you need to do is plug in a 50 to 30amp dogbone. End of story.....
__________________
Danny & Darlene
2002 Silverado 1500HD
2014 Rockwood 2703WS 'Emerald Pkg'
Days camped 2015=42 2014=48 2013=41 2012=47 2011=18
dannyabear is offline   Reply With Quote
Old 07-08-2015, 09:41 PM   #8
Senior Member
 
fast murray's Avatar
 
Join Date: Jul 2011
Location: SD
Posts: 440
Just get a 50 to 30 amp RV adaptor. The motorhome will have a 30 amp main breaker to protect the interior wiring.
__________________
2004 Wildcat 28BH
2012 Ram 2500 CCSB 6.7CTD
fast murray is offline   Reply With Quote
Old 07-08-2015, 09:48 PM   #9
Senior Member
 
mikkeeh's Avatar
 
Join Date: Jul 2014
Location: Mount Vernon, Ohio
Posts: 179
Quote:
Originally Posted by dannyabear View Post
All you need to do is plug in a 50 to 30amp dogbone. End of story.....


NO..NO..NO His outlet is wired 240V. The breaker needs to be changed to 120V......and the outlet rewired. You cant plug an RV into a 240V outlet!!!!

Well I guess you can...but only ONCE.
mikkeeh is offline   Reply With Quote
Old 07-08-2015, 09:56 PM   #10
Senior Member
 
Join Date: Jun 2012
Location: Central Wyoming
Posts: 128
Every 50 amp receptacle intended for an RV is wired for 240 volts. It will be a 4 wire receptacle with two phase conductors a neutral and a ground. 120 volts from each phase to neutral and ground and 240 volts phase to phase. The dog bone adapter from 50 amp to 30 amp will only connect to one phase, the neutral and the ground. If the 50 amp is not a 4 wire receptacle then most likely it is two phases and ground without a neutral. The dog bone will not be the right configuration to plug into it.
WY Husker Fan is offline   Reply With Quote
Old 07-08-2015, 10:05 PM   #11
Senior Member
 
B and B's Avatar
 
Join Date: Jun 2013
Posts: 10,761
Send a message via AIM to B and B
Folks, this requires a Electrician to make sure there is a Neutral. OP stop, save your rig and life please!


A RV 50 amp outlet indeed does have 240 on it as well as the poster up^ stated, This is between the two hot legs which measure 240 and each hot leg to Neutral measures 120 V. If both side of the hot are wired to the same leg in the panel you neutral current is double what the wire can handle bring things up.

It is not 2 phase it is 2 legs for a single phase 120/240V service. Normal home service.

A large campground might have 3 phase service then indeed you have 2 phases of a 208 3 phase service.
B and B is offline   Reply With Quote
Old 07-08-2015, 10:23 PM   #12
Phat Phrog Stunt Crew
 
elind's Avatar
 
Join Date: May 2012
Location: Upper Penisula Michigan / Arizona
Posts: 2,734
Quote:
Originally Posted by mikkeeh View Post
NO..NO..NO His outlet is wired 240V. The breaker needs to be changed to 120V......and the outlet rewired. You cant plug an RV into a 240V outlet!!!!

Well I guess you can...but only ONCE.
On a 240v outlet their will be two hot wires, one neutral, and one ground. Each of the two hot wires will produce 240v when connected together. If you run one hot to a neutral it produces 120v. So if you disregard one hot wire and use the second hot, neutral, and a ground wire you can make a 30 amp RV outlet work at 120v. Then just replace the twin 40 amp breaker for a single 30 amp breaker to the second hot wire in the breaker box. This should be done by a qualified electrician that knows RV wiring.


ps. My 50 amp service to my RV is 240v with 120v powering up two sides of my breaker box.
__________________
Ed & Ruthann / Toby and Tucker
2014 GMC Sierra Crewcab 2500 Duramax
2014 Wildcat 327ck
elind is offline   Reply With Quote
Old 07-09-2015, 02:50 AM   #13
Member
 
Join Date: Jun 2015
Posts: 61
This is some great info. Thanks much. Now that I have read carefully all that have responded to my thread, I may just hire an electrician. I have gotten so far as planning to use a single pole 30 breaker where the two pole breaker is now that powered the welder in the garage. I have also got hold of a 30 amp receptacle for the RV shore power cord to plug into. I have not yet done any wiring or changing at the panel. The 50A receptacle is only three wires so thats easy. The panel has a double pole with 40 each to cover the 50amps needed for the welder. In taking out that double pole and replacing it with a single pole, I was going to use the white on the breaker to become the new neutral and connect it to the other neutrals. Then the garage receptacle white wire also becomes the neutral with the black hot and the copper as the ground in the new 30A receptacle. Does this sound right to you electrical gurus???
__________________
Doug Michaels
2015 Solera 24W
Three big dogs
One wife
Two kayaks, One SUP
Bend, Oregon
Solera is offline   Reply With Quote
Old 07-09-2015, 05:15 AM   #14
Member
 
Join Date: Jan 2015
Location: Poconos, PA
Posts: 79
A 240 volt 50 amp receptacle does not necessarily have a neutral.. It could be a welding outlet which is only 2 hots and a ground.. This could be changed at the panel box along with the correct 30 amp 120 volt breaker and receptacle.. Some of the answers here are misleading... A picture or two would have eliminated the confusion..

Joe
meganjoe is offline   Reply With Quote
Old 07-09-2015, 05:22 AM   #15
Member
 
Join Date: Jan 2015
Location: Poconos, PA
Posts: 79
Quote:
Originally Posted by B and B View Post
Folks, this requires a Electrician to make sure there is a Neutral. OP stop, save your rig and life please!


A RV 50 amp outlet indeed does have 240 on it as well as the poster up^ stated, This is between the two hot legs which measure 240 and each hot leg to Neutral measures 120 V. If both side of the hot are wired to the same leg in the panel you neutral current is double what the wire can handle bring things up.

It is not 2 phase it is 2 legs for a single phase 120/240V service. Normal home service.

A large campground might have 3 phase service then indeed you have 2 phases of a 208 3 phase service.
You can not very easily wire both sides to the same leg.. the breaker will not let you do that ( if installed correctly) ..

Joe
meganjoe is offline   Reply With Quote
Old 07-09-2015, 07:45 AM   #16
Senior Member
 
jtstromsburg's Avatar
 
Join Date: Jul 2011
Location: Stromsburg, Nebraska
Posts: 1,682
Quote:
Originally Posted by Solera View Post
This is some great info. Thanks much. Now that I have read carefully all that have responded to my thread, I may just hire an electrician. I have gotten so far as planning to use a single pole 30 breaker where the two pole breaker is now that powered the welder in the garage. I have also got hold of a 30 amp receptacle for the RV shore power cord to plug into. I have not yet done any wiring or changing at the panel. The 50A receptacle is only three wires so thats easy. The panel has a double pole with 40 each to cover the 50amps needed for the welder. In taking out that double pole and replacing it with a single pole, I was going to use the white on the breaker to become the new neutral and connect it to the other neutrals. Then the garage receptacle white wire also becomes the neutral with the black hot and the copper as the ground in the new 30A receptacle. Does this sound right to you electrical gurus???
Think you are correct! Not too difficult, just be safe. Sounds like you all ready have a decent understanding of electricity.
__________________
Joel and Teresa
2016 Sabre 34TBOK
2006 GMC 3500 CC LB DRW 4X4
jtstromsburg is offline   Reply With Quote
Old 07-09-2015, 10:02 AM   #17
Senior Member
 
mikkeeh's Avatar
 
Join Date: Jul 2014
Location: Mount Vernon, Ohio
Posts: 179
Quote:
Originally Posted by mikkeeh View Post
NO..NO..NO His outlet is wired 240V. The breaker needs to be changed to 120V......and the outlet rewired. You cant plug an RV into a 240V outlet!!!!

Well I guess you can...but only ONCE.


My apologies......I stand corrected My previous hands on RV experience is with a buddy who had 30A plug and assumed he could use it in a regular dryer (240) outlet.....which obviously didn't work. I never realized the a 50A RV plug had 2 hots, and the 50/30 adaptor only linked to 1 side.....thus utilizing 120V. Sorry bout the mis-information.
mikkeeh is offline   Reply With Quote
Old 07-09-2015, 10:09 AM   #18
Senior Member
 
B and B's Avatar
 
Join Date: Jun 2013
Posts: 10,761
Send a message via AIM to B and B
Quote:
Originally Posted by meganjoe View Post
You can not very easily wire both sides to the same leg.. the breaker will not let you do that ( if installed correctly) ..

Joe
Joe, I am aware of this but if someone use 2 seperate breakers, just because they are there, they can do this. Seen it done before.
B and B is offline   Reply With Quote
Old 07-09-2015, 10:10 AM   #19
Member
 
Join Date: Jan 2015
Location: Poconos, PA
Posts: 79
Quote:
Originally Posted by mikkeeh View Post
My apologies......I stand corrected My previous hands on RV experience is with a buddy who had 30A plug and assumed he could use it in a regular dryer (240) outlet.....which obviously didn't work. I never realized the a 50A RV plug had 2 hots, and the 50/30 adaptor only linked to 1 side.....thus utilizing 120V. Sorry bout the mis-information.
If the original 50 amp outlet bought into question is a 50 amp rv outlet then there would be a neutral there and all you would need would be the 50 to 30 adapter like you would use at a campground..

I think the confusion is wheather or not that is the case..

Joe
meganjoe is offline   Reply With Quote
Old 07-09-2015, 11:37 AM   #20
SaubleGuy
 
Join Date: Mar 2015
Posts: 14
Different types of 50A receptacles ie: 2wire welder, 4wire RV, 4 wire range. Need to understand what you're looking at. The wire can definitely be reused for your 30A RV receptacle. Dogbone adapters are only available if it is a 50A RV receptacle - wont work if its a range receptacle. Check the voltage at the receptacle when you're done the mod to make sure its 120!
Saubleguy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 06:12 PM.