Replacing battery cables, isolator considerations

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Ok, so I need to sell the welding spool and get the right cable. Exactly the feedback I need to hear.
 
well check the code on the welding cable and see what it is. it seems to me the welding cable on the retractable spool is worth far more intact then battery cables. those retractable spools are crazy expensive. highdesertranger
 
highdesertranger said:
well check the code on the welding cable and see what it is.  it seems to me the welding cable on the retractable spool is worth far more intact then battery cables.  those retractable spools are crazy expensive.   highdesertranger

Yeah, it lists for over $500, I got it, and a ton of other misc stuff, off of Amazon Warehouse Deals when it first started and there really were some deals on there. Was stocking up workshop/hobby shop type stuff for a remote location build but that changed. I've decluttered to where I just have shop tools left to shed. Got couple 1950's Delta drill presses, Powermatic 66 USA made table saw, late '40's Craftsman 10" bandsaw, etc. 
But I digress. 
Gotten to where I hate doing deals on CL but got a few more to do I guess.
 
just remember that the scrap value of the copper is probably a couple hundred bucks. highdesertranger
 
Well, I got a set of 2/0, w/ a 3/0 starter connect. Factory is 1/0 w/ 2/0 starter connect.

Vince the owner is a super nice guy, very accommodating and easy to work with. He would have made me whatever I wanted but he had a set like I got made up already and the 3/0 set would have taken another day or so. The household I'm currently in uses my two vehicles and the car's fuel system started spraying fuel from a commonly occurring problem, for that car, yesterday so I chose to go w/ the made up set so we're not out of vehicles for when their work week starts.

Oh well, truck is starting ok for the time being w/ the old set still on. I may hold off on putting the new on till I get the car fixed if the truck continues to start for that long. Then I'm sure he'd let me return the 2/0 pieces and upgrade to 3/0.  

One comment Vince had about different gauges in the set was that, re: desiring equal loads on batteries, both batteries will have the same sized cable for ground no matter what gauge starter cable you use. <shrugs> Made sense to me but what do I know.
 
Are you not replacing ground cables with a guage at least as large as the battery positive cable as well?
 
bullfrog said:
Are you not replacing ground cables with a guage at least as large as the battery positive cable as well?

All pos and neg cables will be 2/0 except lead from batteries to starter, it will be 3/0. Positive cable between batteries will be 2/0. Dual battery setup
 
I missed = what is it you are starting that requires 3/0 cable? If 3/0 positive is required, then 3/0 negative will also be required. If 2/0 negative is sufficient then 3/0 positive is over kill. I would favor 3/0 inter-battery connections, but believe 2/0 would be more than fine.
 
Weight said:
I missed = what is it you are starting that requires 3/0 cable? If 3/0 positive is required, then 3/0 negative will also be required. If 2/0 negative is sufficient then 3/0 positive is over kill. I would favor 3/0 inter-battery connections, but believe 2/0 would be more than fine.

7.3 Powerstroke diesel

You may be right but with batteries in parallel each battery (2) has a 2/0 negative to frame that would be more capacity than the 3/0 that goes to the starter, correct or no? From factory is similar design only everything upgraded in size, iirc.
 
It's a truck, it came from the factory that way.
 
it's wired right it's the main battery set up on a Ford diesel. John you are thinking of house batteries. highdesertranger
 
Well, stuck w/ the 2/0 set w/ 3/0 to starter and got it done myself this AM. Unbelievable difference non-corroded larger gauge fresh cables make.
Truck had been sitting for a few days after it wouldn't start. After I finished, turned the key and fired right up w/ starter spinning faster than I've heard it since I got it. I'm smiling. After a few miles it was even better.

4/0 all around would be booger to run. Wrestling that 3/0, just for the starter, in and around, twisting to get connectors to lay correctly was bad enough my hands are sore, lol.
 
4/0 would just be silly. I've built backup ICBM rocket ignition sets that used 4/0 cable. I'm guessing if 4/0 can light off an ICBM, 2/0 should be good for a 7.3.
 
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