Thread Tools Search this Thread Display Modes
Old 04-19-2017, 06:56 PM   #1
4 Rivet Member
CA_Tallguy's Avatar
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 496
Using ground for circuit negative instead of dedicated neg

Hey folks -- just wondering if there are any risks to using the chassis for sending a large amount of current from the front to the back of the trailer.

Don't cars and trucks do this with the alternator and the starter? Just use the chassis ground for the negative?

I have a new tow vehicle and I am hooking up an Anderson connector with 1/0 cable to send many many amps back to the trailer. I've also moved my batteries to the axle area and I'm trying to decide if I need to run a dedicated positive AND negative or just the positive, using the chassis for the negative.

I was doing this with my last tow vehicle (on the tow vehicle side) and it sure does work fine. Not sure how smart it is but I believe that I previously decided it was OK based on the starter and alternator using the chassis for ground. Just want to think it through again now that I am rewiring the battery bank and a new tow vehicle.

WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 04-19-2017, 08:03 PM   #2
4 Rivet Member
1977 31' Sovereign
2005 30' Safari
1977 28' Argosy 28
North Port , Florida
Join Date: Mar 2007
Posts: 326
If you're power source is coming from the TV to the trailer, I would run both to the trailer, then you could use the frame to continue. I would definitely put some heavy duty ground straps from one side of the frame to the other so you don't run into poor ground issues. Long wheelbase trucks will utilize a large ground strap to jump over to the opposite side (of the batteries) frame rail as almost everything is chassis ground
cliffcharb is offline   Reply With Quote

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
Which neg.- black wire to disconnect?? MOS Batteries, Univolts, Converters & Inverters 3 06-17-2016 05:17 PM
50 AMP fuse on Neg or Positive Pinchy Batteries, Univolts, Converters & Inverters 16 05-29-2011 07:56 AM
Dedicated positive wire for solar? JimmyT Generators & Solar Power 8 05-22-2010 10:16 AM
Neg. Batt. Fuse location? jamesardis Batteries, Univolts, Converters & Inverters 5 11-02-2008 04:09 AM
Fused Neg. at panel?? Phil Gobie Electrical - Systems, Generators, Batteries & Solar 3 02-19-2007 05:59 AM

Featured Campgrounds

Reviews provided by


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.

All times are GMT -6. The time now is 07:43 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.