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

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class C Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-04-2019, 05:22 PM   #1
Junior Member
 
Tony4qts's Avatar
 
Join Date: May 2016
Posts: 15
Question about reducing a 50amp down to a 30amp cord for 30amp service

I know when I had a class A that was a 50 amp service that if I had to I could “dog bone” it down to a 30 safely. Now that I have a motorhome that takes a 30 amp service can I use a 50amp “dog bone” that reduces down to a 30amp safely with a 30amp surge protector? I just want to plug it in to keep the battery charged but I don’t want to fry my inverter.
Thanks for any helpful advice
Tony4qts is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-04-2019, 05:35 PM   #2
Senior Member
 
gljurczyk's Avatar
 
Join Date: Mar 2016
Posts: 419
Quote:
Originally Posted by Tony4qts View Post
I know when I had a class A that was a 50 amp service that if I had to I could “dog bone” it down to a 30 safely. Now that I have a motorhome that takes a 30 amp service can I use a 50amp “dog bone” that reduces down to a 30amp safely with a 30amp surge protector? I just want to plug it in to keep the battery charged but I don’t want to fry my inverter.
Thanks for any helpful advice
Yes, just plug in the 50 with the dog bone, I do it all the time.
gljurczyk is offline   Reply With Quote
Old 04-04-2019, 06:42 PM   #3
Senior Member
 
Join Date: Jul 2014
Posts: 28,352
Yes it will work.

The dogbone, plugged into the 50 amp 240 volt outlet, will only use one 120 volt leg to the 30 amp female end.

Here is a Xray view. I circled the unused line.

Click image for larger version

Name:	Capture%2B_2019-04-04-20-40-28.jpeg
Views:	113
Size:	51.8 KB
ID:	240688
twinboat is offline   Reply With Quote
Old 04-04-2019, 06:49 PM   #4
Dom
Senior Member
 
Join Date: Apr 2018
Posts: 643
50 amp service will still be 120 volt.
Dom is offline   Reply With Quote
Old 04-04-2019, 08:28 PM   #5
Junior Member
 
Tony4qts's Avatar
 
Join Date: May 2016
Posts: 15
Thank you all for the helpful responses
Tony4qts is offline   Reply With Quote
Old 04-06-2019, 06:05 AM   #6
Senior Member
 
KanzKran's Avatar


 
Join Date: Sep 2018
Posts: 1,739
If you’re uncomfortable plugging your 30A cord into a 50A circuit, you could always replace the 50A 2-pole breaker with a 30A 2-pole breaker and still use the dog bone.

That would enable a guest to use the circuit for a 50A coach, though at a 7.2kW capacity rather than at 12kW. Your 30A cord would be protected by the coach’s 30A breaker either way, but if it bothered you, there’s nothing wrong with dropping down in ampacity on the supply breaker.
KanzKran is online now   Reply With Quote
Old 04-06-2019, 06:11 AM   #7
Senior Member
 
Frutza's Avatar
 
Gulf Streamers Club
Freightliner Owners Club
Join Date: Dec 2011
Location: Corinth, MS
Posts: 451
If you’re uncomfortable plugging your 30A cord into a 50A circuit, you could always replace the 50A 2-pole breaker with a 30A 2-pole breaker and still use the dog bone.
DO NOT DO THIS!! 30AMP IS NOT A 220 CICUIT
2 pole breaker will be a 220 circuit 30 Amp is a 110 volt circuit
__________________
Mike & Becky
2005 Gulfstream Crescendo 8356
Frutza is offline   Reply With Quote
Old 04-06-2019, 06:25 AM   #8
Senior Member
 
Join Date: Jul 2014
Posts: 28,352
Quote:
Originally Posted by Frutza View Post
If you’re uncomfortable plugging your 30A cord into a 50A circuit, you could always replace the 50A 2-pole breaker with a 30A 2-pole breaker and still use the dog bone.
DO NOT DO THIS!! 30AMP IS NOT A 220 CICUIT
2 pole breaker will be a 220 circuit 30 Amp is a 110 volt circuit
The breaker doesn't change the voltage. If it was a double 50 amp breaker, It was and is 240 volts.

Replacing it with a double 30 amp breaker makes it a 30 amp 240 volt service.
twinboat is offline   Reply With Quote
Old 04-06-2019, 06:27 AM   #9
Senior Member
 
Join Date: Jul 2014
Posts: 28,352
Quote:
Originally Posted by Dom View Post
50 amp service will still be 120 volt.
Not quite true,

http://www.myrv.us/electric/Pg/50amp_Service.htm

Click image for larger version

Name:	Capture%2B_2019-04-06-08-26-25.jpeg
Views:	110
Size:	78.1 KB
ID:	240903
twinboat is offline   Reply With Quote
Old 04-06-2019, 06:46 AM   #10
Senior Member
 
Busskipper's Avatar
 
Join Date: Sep 2007
Location: Grasonville, MD -- Golden, CO
Posts: 6,111
Quote:
Originally Posted by twinboat View Post
Good info in the Link.

If you Do Not Understand Electrical Info - Get an ELECTRICIAN - The forum will often lead you down the WRONG path.

JMHO,
__________________
Busskipper
Location - Grasonville, Maryland - and/or - Superior, Colorado
2005 Travel Supreme 42DS04 - GX470 Toad
Busskipper is offline   Reply With Quote
Old 04-06-2019, 07:01 AM   #11
Registered User
 
Join Date: Jul 2018
Posts: 3,165
Quote:
Originally Posted by Frutza View Post
If you’re uncomfortable plugging your 30A cord into a 50A circuit, you could always replace the 50A 2-pole breaker with a 30A 2-pole breaker and still use the dog bone.
DO NOT DO THIS!! 30AMP IS NOT A 220 CICUIT
2 pole breaker will be a 220 circuit 30 Amp is a 110 volt circuit
this is the part that is not true.

Please do not give out DIY electric advice. Reducing the 50 2 pole to a 30 2 pole is VERY safe and the only way to do it properly per the NEC. (National Electric Code). Dog bones are actually not per code because the proper amperage protection is for the wire. If you have 50 amp protection on a 30 amp wire it is not to code. The wire protection is supposed to be at the head of the service not back in the RV. Dog bones are safe just not technically correct.
cavie is offline   Reply With Quote
Old 04-06-2019, 07:25 AM   #12
Junior Member
 
Tony4qts's Avatar
 
Join Date: May 2016
Posts: 15
Ok, now I’m confused again lol so can’t I or can I safely plug into a 50amp and dog bone it with a surge protector down to a 30amp?
Tony4qts is offline   Reply With Quote
Old 04-06-2019, 07:40 AM   #13
Community Administrator
 
Spk64's Avatar


 
Newmar Owners Club
Join Date: Apr 2014
Location: Southern Indiana
Posts: 17,171
Yes, you can use the dog bone.
__________________
Steve
2002 Newmar Mountain Aire 4095
Spk64 is offline   Reply With Quote
Old 04-06-2019, 08:51 AM   #14
Senior Member
 
Frutza's Avatar
 
Gulf Streamers Club
Freightliner Owners Club
Join Date: Dec 2011
Location: Corinth, MS
Posts: 451
Sorry if I spread confusion, I was quoting the previous post
By all means use the dog bone, do not try to change the outlet unless your positive how to wire it
__________________
Mike & Becky
2005 Gulfstream Crescendo 8356
Frutza is offline   Reply With Quote
Reply

Tags
service



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
30amp or 50Amp service with solar.... Rvlegaleagle RV Systems & Appliances 46 09-04-2017 10:46 AM
Adapter for 50amp cord to regular extension cord? TwoDog RV Systems & Appliances 21 06-10-2016 08:27 AM
50amp service down to 30amp service Gary G. RV Systems & Appliances 15 08-23-2013 04:05 AM
ext-cord 50amp or 30amp srzak iRV2.com General Discussion 28 06-16-2011 06:33 AM
50amp to 30amp to 50amp SwampTrash RV Systems & Appliances 4 05-09-2010 08:23 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 09:26 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.