Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
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 07-10-2015, 07:54 PM   #1
Senior Member
 
Join Date: Dec 2012
Location: Paradise, Ca.
Posts: 409
Positive ground or negative ground?

What is the difference between positive ground and negative ground?
How do you determine if your trailer/vehicle is positive or negative ground?

Thanks in advance for the information.
__________________

__________________
2017 Cardinal 3250 5th wheel
2016 Ram 3500 Crew Cab long bed with Aisin Transmission
1010 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 07-10-2015, 08:03 PM   #2
Senior Member
 
Tha_Rooster's Avatar
 
Join Date: Aug 2008
Location: Georgia
Posts: 4,517
Positive =hot / negative = ground or earth I'd say it's negative ground and positive goes through switches just like a house.
There is hot,neutral,ground.
__________________

__________________
2007 Fleetwood Revolution LE 40V
Tha_Rooster is offline   Reply With Quote
Old 07-10-2015, 08:24 PM   #3
Senior Member
 
Join Date: Dec 2012
Location: Paradise, Ca.
Posts: 409
I understand positive & negative. I have a power inverter that is not to be used in a "positive ground vehicle". I am the son of an electrician, dad never told me about positive ground.....well maybe he did and I was not listening.
__________________
2017 Cardinal 3250 5th wheel
2016 Ram 3500 Crew Cab long bed with Aisin Transmission
1010 is offline   Reply With Quote
Old 07-10-2015, 08:35 PM   #4
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,085
I don't think any vehicle has used a positive ground in the last 60 years. I'm sure there is an exception somewhere (there always is), but nothing you are likely to ever encounter.

In any case, the way to determine it would be to check the battery wiring. If the negative battery post is wired direct to the chassis, it's a negative ground. If the positive terminal, then its a positive ground.

Some vehicles don't use the chassis as the ground circuit at all - they run two wires to each and every electrical device. Vehicles that don't have a metal frame, for example. Technically these still have a ground side and a hot side, though.

Incandescent lights a don't care which wire is hot and which is ground, but electronic devices, including LED lighting, cares very much and only works one way. The industry standard for 12vdc devices is to use the negative side as the ground.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 07-10-2015, 08:39 PM   #5
Junior Member
 
Monaco Owners Club
Join Date: Sep 2014
Location: Leesburg, Fl
Posts: 17
I grew up in a gas station in the 60's, remember when they used to wash windshields and check the oil??

Back in the 40's and 50's some cars used to use a Positive ground electrical system were the battery's Positive terminal was tied to the chassis as the ground and the Negative terminal was connected to the vehicles wiring. Most of these systems were only 6vDC and used a belt driven generator instead of an alternator.

Unless you're into antiques I don't you have to worry about Positive ground systems..
__________________
Glen and Cheryl
99 Monaco Diplomat 38A
2012 Jeep Liberty
PepaGlen is offline   Reply With Quote
Old 07-10-2015, 08:40 PM   #6
Senior Member
 
rivraton's Avatar
 
Join Date: Jun 2014
Posts: 353
Quote:
Originally Posted by 1010 View Post
What is the difference between positive ground and negative ground?
How do you determine if your trailer/vehicle is positive or negative ground?

Thanks in advance for the information.
Most ALL US made vehicles and trailers will be NEG ground. POS grounding was used on some older European vehicles. How to tell? look at the battery cables, if the NEG cable goes to the frame, It' NEG ground.
__________________
2015 A.C.E. 27.1
American Car Dolly
2001 Ram 1500 / 2012 Kia Soul....Go Hamsters!
rivraton is offline   Reply With Quote
Old 07-11-2015, 12:32 AM   #7
Senior Member
 
Join Date: Dec 2012
Location: Paradise, Ca.
Posts: 409
Thank you all for your replies, my question(s) have been answered.
__________________
2017 Cardinal 3250 5th wheel
2016 Ram 3500 Crew Cab long bed with Aisin Transmission
1010 is offline   Reply With Quote
Old 07-11-2015, 12:39 AM   #8
Senior Member
 
Join Date: Dec 2012
Location: Paradise, Ca.
Posts: 409
Quote:
Originally Posted by PepaGlen View Post
I grew up in a gas station in the 60's, remember when they used to wash windshields and check the oil??

Back in the 40's and 50's some cars used to use a Positive ground electrical system were the battery's Positive terminal was tied to the chassis as the ground and the Negative terminal was connected to the vehicles wiring. Most of these systems were only 6vDC and used a belt driven generator instead of an alternator.

Unless you're into antiques I don't you have to worry about Positive ground systems..
I was one of those guys washing windshields & checking the oil too, one of the best jobs I had while working my way through college.
Guess my 6 volt 64 Volkswagon was a Positive ground ? I really liked that car.
__________________
2017 Cardinal 3250 5th wheel
2016 Ram 3500 Crew Cab long bed with Aisin Transmission
1010 is offline   Reply With Quote
Old 07-11-2015, 01:37 AM   #9
Senior Member
 
RobRV's Avatar
 
Newmar Owners Club
Join Date: Dec 2004
Location: Wet Coast of Canada
Posts: 557
The only Positive Ground Cars that I can remember were made by General Motors! Not saying there weren't others but the GM products definitely were made in America!
__________________
Rob
RobRV is offline   Reply With Quote
Old 07-11-2015, 01:39 AM   #10
Senior Member
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Oct 2013
Posts: 758
Quote:
Originally Posted by 1010 View Post
Guess my 6 volt 64 Volkswagon was a Positive ground ? I really liked that car.
Absolutely not! Volkswagen has always been negative ground, including the 6V vehicles. Even the famousVW Type 128 and 166 Schwimmwagen, (boat car), had a negative ground electrical system.

My 2nd car was a 1965 Type 1 Bug, (with the stock 1300cc, 6V), that I purchased in 1983 for $150.00!

My very first car was a 1964 356 Porsche 356sc, a rust bucket purchased for $1,000 that I restored with my dad, (also a negative ground system).
__________________
BeachDude is offline   Reply With Quote
Old 07-11-2015, 07:26 AM   #11
Junior Member
 
Join Date: Sep 2011
Posts: 5
Had a MG Midget that had a positive ground.
__________________
Chevy2 is offline   Reply With Quote
Old 07-11-2015, 07:32 AM   #12
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 26,781
Here is a link to explain much about your TT or MH.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 07-11-2015, 08:50 AM   #13
Senior Member
 
Join Date: Mar 2013
Posts: 304
Many British cars use to be positive ground.
__________________
MotorPro is offline   Reply With Quote
Old 07-11-2015, 10:17 AM   #14
Senior Member
 
Join Date: Feb 2010
Posts: 4,493
The reason for positive ground is related to how magic happens at the atomic level and I can not remember specifics this morning.

Telephone systems are all positive ground and transmission sites are variable as most 48 volt sites are positive ground but 25 volt ones depend on manufacturer.

There may have been some old truck equipment that was positive ground but my memory of the old oddballs were some that had a weird starting system that had 2 batteries that starter selenoid would series to 24 volt for starting and we had to be real carefully hooking up the radios but that was a long time ago...
__________________

__________________
Tony & Lori
1989 Country Coach Savannah SE
TQ60 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
ACE motorhome tailpipe close to ground JhnsnDavid Thor Industries Owner's Forum 9 06-27-2015 02:56 PM
Front Electrial Ground - Where is it located? Ed F Monaco Owner's Forum 6 06-19-2015 06:43 PM
voltage on ground smoker Class A Motorhome Discussions 6 05-21-2015 08:18 PM
Airplane ground crews have their say pumper9x9 RV'ing Humor & Crazy but True Stories 5 11-04-2014 08:05 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.