Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-19-2018, 08:50 PM   #1
3 Rivet Member
 
The Ice Man's Avatar
 
2011 27 FB International
Tucson , Arizona
Join Date: Apr 2014
Posts: 226
Electrical Gurus - 50 to 30 amp dog bones

I have a 50 amp pedestal on my property and when other ASers visit I use a 50 to 30 dog bone.

If I need to remain hooked, or if I have two needy visitors at once, I'm wondering how dangerous, fatal, hair-brained (or what ever term suits your fancy) the following idea is:

The standard 50A pedestal is wired Ground, Hot "A," Common, Hot "B." If I create a "double dog bone" by wiring two 30 A females into one 50 A male, how much trouble am I looking at? I'm looking at Circuit "A" using "Hot A," shared common and shared Ground; and Circuit "B" using "Hot B," shared common and shared ground, realizing that "A" and "B" are 180 degrees out-of-phase. Similar to this:
https://www.amazon.com/Epicord-Adapt...ogbone+adapter

Why won't this work, bearing in mind I don't want to make crispy critters out of my friends?

Your views are appreciated.
__________________

The Ice Man is offline   Reply With Quote
Old 02-20-2018, 07:11 AM   #2
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,498
Images: 2
Blog Entries: 5
Looks like the female ends are 20 amp.
It would be difficult to run AC's. Other than that, it should work.
__________________

__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 02-20-2018, 07:28 AM   #3
Site Team
 
azflycaster's Avatar
 
2002 25' Safari
Dewey , Arizona
Join Date: Mar 2005
Posts: 12,522
Images: 62
Blog Entries: 1
This is what you want.
https://www.amazon.com/dp/B073WB5LBY...a-350338554146

We used 100+ of these at the Escanaba International Rally last year. Running AC was not a problem.
__________________

Richard

Wally Byam Airstream Club 7513
azflycaster is offline   Reply With Quote
Old 02-20-2018, 07:44 AM   #4
4 Rivet Member
 
mojoe7009's Avatar

 
2017 30' Classic
Green Cove Springs , Florida
Join Date: Oct 2016
Posts: 450
Quote:
Originally Posted by azflycaster View Post
This is what you want.

https://www.amazon.com/dp/B073WB5LBY...a-350338554146



We used 100+ of these at the Escanaba International Rally last year. Running AC was not a problem.


Yep, use to carry one of these on my boat. I had two 30 amp inlets on the boat and used one of these to tap the 50 amp outlet at the marina. Worked like a champ for years.
__________________
Breathe In, Breathe Out, Move On
2017 Classic 30', ProPride 3P Hitch, 2016 RAM 2500 Limited CC 4x4 SRW w/ 6.7L Cummins Turbo Diesel and Retrax Pro MX Tonneau Cover
mojoe7009 is offline   Reply With Quote
Old 02-20-2018, 07:48 AM   #5
Rivet Master
 
Al and Missy's Avatar

 
2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 2,850
Quote:
Originally Posted by The Ice Man View Post
I have a 50 amp pedestal on my property and when other ASers visit I use a 50 to 30 dog bone.

If I need to remain hooked, or if I have two needy visitors at once, I'm wondering how dangerous, fatal, hair-brained (or what ever term suits your fancy) the following idea is:

The standard 50A pedestal is wired Ground, Hot "A," Common, Hot "B." If I create a "double dog bone" by wiring two 30 A females into one 50 A male, how much trouble am I looking at? I'm looking at Circuit "A" using "Hot A," shared common and shared Ground; and Circuit "B" using "Hot B," shared common and shared ground, realizing that "A" and "B" are 180 degrees out-of-phase. Similar to this:
https://www.amazon.com/Epicord-Adapt...ogbone+adapter

Why won't this work, bearing in mind I don't want to make crispy critters out of my friends?

Your views are appreciated.
In essence, that is what happens inside a trailer with 50A service, as long as it doesn't have 240V loads like a home stove or clothes dryer. It should work just fine, but get 30A receptacles, or buy the one suggested by Azflycaster.

Al
__________________

"You cannot reason someone out of a position they have not been reasoned into"

Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
2001 Safari 25 RB Twin (Gone, but not forgotten)
WBCCI 1322, TAC FL-39, AIR 82265

Al and Missy is offline   Reply With Quote
Old 02-20-2018, 09:47 AM   #6
3 Rivet Member
 
The Ice Man's Avatar
 
2011 27 FB International
Tucson , Arizona
Join Date: Apr 2014
Posts: 226
Quote:
Originally Posted by azflycaster View Post

That's perfect. I thought I had searched Amazon and only found the 20 amp version. That's why I was thinking of making one up. This is ready made and costs less than the components bought individually.

Thanks!
The Ice Man is offline   Reply With Quote
Old 02-20-2018, 10:46 AM   #7
2 Rivet Member
 
1985 31' Excella
st. Paul , mn
Join Date: May 2007
Posts: 64
Bad math , the 1st link gave 2 x 15amp = 30 amp outlets from 1 - 50amp .
The second link 2 x 30amp = 60amp , from 1 x 50 - overloaded by 10 amps .
__________________
85 Excella , 31' , electric brakes , R. twin [ would like it to be a single ] , future upgrades , composting toilet [ replace black water tank with a 2nd fresh ] , solar power , instant hot water heater .
Tow 94 Dodge Ram , 4x4 , Cummins , AT .
JohnTF is offline   Reply With Quote
Old 02-20-2018, 11:05 AM   #8
Rivet Master
 
Al and Missy's Avatar

 
2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 2,850
Quote:
Originally Posted by JohnTF View Post
Bad math , the 1st link gave 2 x 15amp = 30 amp outlets from 1 - 50amp .
The second link 2 x 30amp = 60amp , from 1 x 50 - overloaded by 10 amps .
Nope - Each leg of the 50 amp service is rated at 50 amps.

Al
__________________

"You cannot reason someone out of a position they have not been reasoned into"

Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
2001 Safari 25 RB Twin (Gone, but not forgotten)
WBCCI 1322, TAC FL-39, AIR 82265

Al and Missy is offline   Reply With Quote
Old 02-20-2018, 11:59 AM   #9
WBCCI # 23456
 
2000 30' Excella
Greeneville , Tennessee
Join Date: Jul 2008
Posts: 175
Yep

Quote:
Originally Posted by azflycaster View Post
This is what you want.
https://www.amazon.com/dp/B073WB5LBY...a-350338554146

We used 100+ of these at the Escanaba International Rally last year. Running AC was not a problem.
Right on!
jimfa440 is offline   Reply With Quote
Old 02-20-2018, 06:07 PM   #10
1 Rivet Member
 
dfbroussard's Avatar
 
2004 25' International CCD
NEW ORLEANS , Louisiana
Join Date: Apr 2015
Posts: 9
Its done all the time, but you should be aware that you and/or your friends won't be properly protected electrically. You'll have a 50AMP breaker protecting a 30 Amp cable. Not really idea or to NEC code. If you swap out the 50Amp double pole breaker with a 30Amp double pole breaker it would be much safer (and meet code).
dfbroussard is offline   Reply With Quote
Old 02-20-2018, 07:19 PM   #11
4 Rivet Member
 
AirstreamCSH's Avatar
 
2016 25' Flying Cloud
Huntington , New York
Join Date: Jan 2017
Posts: 262
Please read what dfbroussard said again.
The breaker exists to protect the wires. Not the equipment.
If you downsize the wires you need to downsize the breaker.
AirstreamCSH is offline   Reply With Quote
Old 02-20-2018, 07:47 PM   #12
Site Team
 
azflycaster's Avatar
 
2002 25' Safari
Dewey , Arizona
Join Date: Mar 2005
Posts: 12,522
Images: 62
Blog Entries: 1
You do have 50 amps available at the pedestal, but the mainline breaker at the trailer is 30 amp.
__________________

Richard

Wally Byam Airstream Club 7513
azflycaster is offline   Reply With Quote
Old 02-20-2018, 08:02 PM   #13
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,498
Images: 2
Blog Entries: 5
There is no protection of wire between the pedestal and the panel inside the trailer.
The breaker in the trailer only protects what is downstream.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 02-20-2018, 08:46 PM   #14
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 6,127
Images: 2
the power is there... why not just add the two 30 amp receptacles? only don't use the 50 if using any 30?
__________________

__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is offline   Reply With Quote
Reply


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
60's- 80's fixer, solid bones! murphyslaw Airstream Classifieds 0 05-11-2016 09:08 PM
Bare bones towing with Cherokee badpaddler Towing, Tow Vehicles & Hitches 7 09-25-2015 11:28 AM
Good Bones or Good-to-Go? starstruck08 Buyer Guidelines 24 08-14-2015 04:44 PM
Looking for Electrical System Gurus KCN Generators & Solar Power 2 11-17-2014 11:33 AM
You want to see the bare bones of an ARGOSY ? Octane Argosy Motorhomes 0 07-17-2011 04:44 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:34 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.