|
09-01-2017, 07:46 PM
|
#1 |
|
Registered User
Join Date: Mar 2015
Location: Midland Texas
Posts: 174
|
Ground wire sizing
I am almost done wiring my LS swap in my '85 C10. I have the grounds for the ls harness hooked up. I was wondering if 12 guage wire is enough to ground the motor to the firewall and to the frame?
Posted via Mobile Device |
|
|
|
09-01-2017, 08:35 PM
|
#2 |
|
Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,583
|
Re: Ground wire sizing
probably...but I bought one of those flexible braided ground straps for mine...
|
|
|
|
|
09-01-2017, 09:12 PM
|
#3 |
|
Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,052
|
Re: Ground wire sizing
The exact same current that flows on the plus side flows back to the source on the negative side so both need to be the same. Or rather, both need to be larger than the needed to feed the load. The point is the delivery system (wires) shouldn't be the limiting factor.
You also need a fusible link/fuse/breaker on (typically) the plus side to prevent smoke in the event of disaster. Last edited by franken; 09-01-2017 at 09:34 PM. |
|
|
|
|
09-03-2017, 11:05 AM
|
#4 |
|
Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,476
|
Re: Ground wire sizing
If your primary negative battery cable goes to the engine block, then the ground straps from block to frame and cab can be smaller. I think the block to cab strap on my 75 roughly equates to a #8 wire and my prime negative cable connects to the alt bracket on the engine.
If your main battery cable goes to the frame, then you need a matching size cable from frame to block. Otherwise your undersized ground strap might go poof when you try to start it. |
|
|
|
|
09-05-2017, 09:39 AM
|
#5 |
|
Registered User
Join Date: Jul 2016
Location: Brandon,MS
Posts: 489
|
Re: Ground wire sizing
Punished you have pictures of your work?
|
|
|
|
 |
| Bookmarks |
|
|
Linear Mode
