Negative battery cable size?

[lump_a_charcoal]

Hi All,

What is the size (CSA*) of the battery negative cable in a 2013 Puma?

I want to remove the existing clamp, and ensure that I get the correct lug.

*cross sectional area, in mm?.

Thanks!

[Dopey]

The Negative battery cable utilises a 50-10 cable lug on the chassis end.
Basically....(Yes, for the pedantics, I realise that there is more to it than that....Ie: difference between nominal and cross sectional area...) that means that the cable is roughly 50mm2, the -10 signifies that the lug has a 10mm hole for bolting through.

When doing a dual battery install, I upgraded the cable size to 70mm2.
Your factory cable has a (I guess you could call it a....) Y junction lug on it with one peice attaching to the transfer case and the other end attaching to the chassis.

I made two cables for my fitment, one Negative to transfer case & one transfer case to chassis.

Photo attached below...

Also,
http://www.sengpielaudio.com/calculator-cross-section.htm

Mike.

[Dopey]

Upgraded negative cable...
Transfer case end at top, chassis end at bottom of the photo.

Mike.

Edit.... Somehow my pic has turned on its side....

[Dopey]

Complete negative battery cable.

[Toxic_Avenger]

Good work 90@
I was going to caution a guess at 35mm2, but having a 50-10 lug on the end is a pretty clear indication.
PS, how spiteful is that factory lug! The factory copper is stiff as too... makes for a real PITA to get the cable run sitting right.
With my dual battery install I had considered re-making the factory negative cable but have got it to a workable place at the moment, but still not 100% happy, so will re-do mine at some stage.
Got any more pics of the cable you made up in 70mm2 ?

[Dopey]

Just making up some heavier winch cables now with the same cable that I used for the dual battery system.

Mike.

[Dopey]

70mm2 fire rated cable,
I would have preferred to use the individually tinned stuff, but the stuff that I ordered hasn't been delivered yet, I need to go bush for a week or two for work and need a winch working and the old winch cables would get too hot....
So making them out of what I have....

When I get back from work, (and the other cable gets delivered) I'll redo the battery system and winch with the tinned 70mm2 cable.

Mike.

[lump_a_charcoal]

Thanks gents!

[landoman]

The Negative battery cable utilises a 50-10 cable lug on the chassis end.
Basically....(Yes, for the pedantics, I realise that there is more to it than that....Ie: difference between nominal and cross sectional area...) that means that the cable is roughly 50mm2, the -10 signifies that the lug has a 10mm hole for bolting through.

When doing a dual battery install, I upgraded the cable size to 70mm2.
Your factory cable has a (I guess you could call it a....) Y junction lug on it with one peice attaching to the transfer case and the other end attaching to the chassis.

I made two cables for my fitment, one Negative to transfer case & one transfer case to chassis.

Photo attached below...




Also,
Cross-sectional area to diameter conversion circle intersection cross section diameter electric cable conductor formula wire diameter and wiring and calculation cross section AGW American Wire Gauge thick area of a solid wire formula conductivity res (http://www.sengpielaudio.com/calculator-cross-section.htm)

Mike.


I want to replace my battery negative cable as that silly cone type screw attaching it to the battery is impossible to get tight and I've had a few cases of not being able to start due to poor connection

I note that the negative battery cable has two attachments ? one to the chassis and one to the transfer case?.. why is this so ?? I note most generic battery cables I can get don't have that intermediate connection ?.. they just have the battery lug and the end connection

if I fitted one of these generic cables to the negative terminal and to the transfer case and left out the intermediate connection to the chassis what would I be missing and what would the result be .

thanks for any insights

[shack]

One is a chassis earth, the other is for the motor, you need both, I've had the one on the transfer case fail and it causes issues.

[landoman]

One is a chassis earth, the other is for the motor, you need both, I've had the one on the transfer case fail and it causes issues.


thanks for that ??..I'm thinking ?..a lead from negative terminal terminal to transfer case connection ?.then a lead from transfer case connection to chassis ??.would that work ?

or should I do a lead fron neg terminal to chassis ?..then a lead to transfer case connection ?

got to do both points of connection ?..just don't understand ..the order

[shack]

thanks for that ??..I'm thinking ?..a lead from negative terminal terminal to transfer case connection ?.then a lead from transfer case connection to chassis ??.would that work ?

or should I do a lead fron neg terminal to chassis ?..then a lead to transfer case connection ?

got to do both points of connection ?..just don't understand ..the orderCould you just replicate what you have with 2 cables with eyelets on the ends?

Just joining them at the point the original cable had the middle eyelet at?

[landoman]

You've lost me now ???.no idea what that means


I have a negative battery terminal ??and two points of connection ??.chassis and transfer case ???.how do I connect with one or two leads ?

[landoman]

Ok on further though I think I got it

cable from neg terminal to chassis ?'then another cable from chassis to transfer case connection ?
.
that should do it ???right ?.

[JDNSW]

To expand the above, some of your electrical circuits are 'earthed' to the engine/gearbox/transfer case and some to the chassis, but both have to go to the battery negative. Some cars have the battery to the engine and some to the chassis, with a separate connection between the engine and chassis - somewhere.

Connecting both to the battery is necessary as the engine is on rubber mounts and hence not very well connected to the chassis. Having a branched cable is actually rather unusual.

failure of the connection between the engine and the chassis can result in some surprising effects such as I remember on one occasion (actually in a Series 2a) when the starter was playing up, and when you operated the starter, the speedo lit up.

[shack]

Ok on further though I think I got it

cable from neg terminal to chassis ?'then another cable from chassis to transfer case connection ?
.
that should do it ???right ?.Correct

[landoman]

Correct

excellent???.thanks ????love this forum??..always puts you in the right direction??.brilliant ?.