Battery cables

RamV · 02-28-2016, 01:08 PM

So im changing my battery cables on my 05 CC precedent, now do just leave that ground wire in the obc or do i cut it out. Im still using the obc. What do you guys think?

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jakesnake27 · 02-28-2016, 01:16 PM

Are you upgrading to a larger gauge?

RamV · 03-02-2016, 01:24 AM

Upgrading from factory to a 2 ga cables

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03-02-2016, 03:00 AM

Quote:

From 1995 - 2014 Club Car used an OBC to control the battery charging system. The main (-) battery cable runs through this computer

The OEM cable end must be cut off to remove the cable and a double ended stud is installed in the hole so a new cable can be attached at each side of the OBC.

carts unlimited sells the entire kit

http://www.cartsunlimited.net/battery-cable-sets.html

jakesnake27 · 03-02-2016, 08:52 AM

Yep, 2 gauge wire will not fit through the OBC, so you must use a stud.

RamV · 03-02-2016, 04:32 PM

Can i just go around or over obc and leave old cable in there?

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Epb · 03-02-2016, 04:38 PM

No don't leave the old in AND bypass. Use the stud kit or leave as is. If u want the technical why need to wait for Sergio.

03-02-2016, 05:00 PM

Quote:

Originally Posted by Sergio

I think You should have a single wire going thru the OBC or a STUD, and here is why:

The club car service manual describes the function of the OBC as:

I don't know if the OBC has always worked this way, maybe someone else can chime in and tell us what year this verbiage first appeared in the service manuals.

For the Club Car claim above to be correct, the OBC must be able to measure the current being drawn from the battery.

The only way that can happen is by the OBC sensing the current going thru the hall effect sensor (hole) in the middle of the OBC.

If a second wire is run parallel to the one going thru the OBC, the amount of current drawn from the battery will be split according to ohms law.

A 4ga wire has about 1/2 of the resistance of a 6ga wire. A 2ga wire has about 1/3 of the resistance of a 6ga wire.

The current will be inversely proportional to the resistance, so the lower the resistance, the higher the current.

Assuming a 60amp draw during cruising speed and a 4ga wire in addition to the 6ga thru the OBC, the current will be split:
6ga wire = 20amps
4ga wire = 40 amps

So the OBC will only know about the 20amps that it could measure.

I assume this information is used during the 2nd phase of the charging process (absorption) to know how long it needs to run.

I am sure there are so many variables involved on how each individual user runs their cart as to be near impossible to describe what if any ill effects will it have by not using the system the way it was designed.

but, why take a chance?

Install the stud, it is really simple.

I got my parts from lowes....

jelmhorst · 03-03-2016, 12:17 PM

I tried sourcing parts at my local Ace hardware and they seemed to not have much in the way of parts. They had a 1/4-20 brass flat head bolt and corresponding nuts. Is it recommended to use brass or will a grade 8 bolt offer similar conductivity? Do you happen to remember the particular length or size bolt that you used? I didn't bring one of the 3/8 cable lugs at the time so wasn't sure if that was going to be too loose of a fit going with the 1/4-20. Thanks.

Sergio · 03-03-2016, 01:48 PM

All Your cable lugs should be 5/16", the only 3/8" lugs are on some High current Solenoids and reversing contactors.

The bolt is a U.S. Brass 5/16" 3-1/2" from Lowes hardware store in the "specialty hardware" section.

If that fails You can always get a 5/16 brass toilet flange bolt.

Lowes also carries the brass lock-washers, regular washers and neoprene washers in the same department section.

I put all of the nuts on the bolt and lined them up even, placed the assembly on a bench vise squeezing the nuts and cut the bolt head with a hack saw.

I then "locked" two of the nuts together, held them with a wrench and ran the other two out of the end I just cut in order to clean the threads.

Wrap a few turns of electric tape on about 1 inch on the center of the bolt and You are done.

02-28-2016, 01:08 PM	#1
RamV Getting Wild Join Date: Jun 2015 Posts: 135	Battery cables So im changing my battery cables on my 05 CC precedent, now do just leave that ground wire in the obc or do i cut it out. Im still using the obc. What do you guys think? Sent from my iPhone using Tapatalk
RamV Getting Wild Join Date: Jun 2015 Posts: 135

02-28-2016, 01:16 PM	#2
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245	Re: Battery cables Are you upgrading to a larger gauge?
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245

03-02-2016, 01:24 AM	#3
RamV Getting Wild Join Date: Jun 2015 Posts: 135	Upgrading from factory to a 2 ga cables Sent from my iPhone using Tapatalk
RamV Getting Wild Join Date: Jun 2015 Posts: 135

03-02-2016, 08:52 AM	#5
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245	Re: Battery cables Yep, 2 gauge wire will not fit through the OBC, so you must use a stud.
jakesnake27 Gone Wild Join Date: Aug 2009 Posts: 14,245

03-02-2016, 04:32 PM	#6
RamV Getting Wild Join Date: Jun 2015 Posts: 135	Can i just go around or over obc and leave old cable in there? Sent from my iPhone using Tapatalk
RamV Getting Wild Join Date: Jun 2015 Posts: 135

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03-02-2016, 04:38 PM	#7
Epb Gone Wild Join Date: Mar 2012 Location: Katy, Tx Posts: 1,027	Re: Battery cables No don't leave the old in AND bypass. Use the stud kit or leave as is. If u want the technical why need to wait for Sergio.

03-03-2016, 12:17 PM	#9
jelmhorst Not Yet Wild Join Date: Jan 2016 Location: Allatoona Lake, GA Posts: 20	Re: Battery cables I tried sourcing parts at my local Ace hardware and they seemed to not have much in the way of parts. They had a 1/4-20 brass flat head bolt and corresponding nuts. Is it recommended to use brass or will a grade 8 bolt offer similar conductivity? Do you happen to remember the particular length or size bolt that you used? I didn't bring one of the 3/8 cable lugs at the time so wasn't sure if that was going to be too loose of a fit going with the 1/4-20. Thanks.

03-03-2016, 01:48 PM	#10
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Battery cables All Your cable lugs should be 5/16", the only 3/8" lugs are on some High current Solenoids and reversing contactors. The bolt is a U.S. Brass 5/16" 3-1/2" from Lowes hardware store in the "specialty hardware" section. If that fails You can always get a 5/16 brass toilet flange bolt. Lowes also carries the brass lock-washers, regular washers and neoprene washers in the same department section. I put all of the nuts on the bolt and lined them up even, placed the assembly on a bench vise squeezing the nuts and cut the bolt head with a hack saw. I then "locked" two of the nuts together, held them with a wrench and ran the other two out of the end I just cut in order to clean the threads. Wrap a few turns of electric tape on about 1 inch on the center of the bolt and You are done.

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