Thread: rear winch power cables -perth

Thanks for that, the winch is for the d2, but also have d1, hopefully I can sell it though. I will have another look behind the head light on passenger side, I haven't really looked at it much, but it looked reasonably easy, as it looked a little tight in the bulkhead corner. I recently got stuck in mud for over 4 hours, really wasn't fun, hence why I now bought a winch, hopefully never need it, but if I do need it, I want it to work. I know the full amp load will only be max load for short time, but if I'm putting in wire, I may as well make sure they do the job, just hope it won't pull the tow bar off.
My other thought was making something like jump leads, so I can use it on other vehicles if needed, instead of the cable hard wired into the car itself.

"...making something like jump leads, so I can use it on other vehicles if needed,..."

Two 6 metre lengths of 70mm cable would be a truly magic set of jumper leads !

I'd suggest an Anderson plug on one end, the other with clips for the battery. Then another short set of clips into a mating Anderson. A duplicate of that but feeding your winch.

- Portable winch and a set of super jumpers, with one cable-set.

I'm running 50mm on the front and 70 for the rear (when I can afford it). Mights as well go one better than the minimum recommended, which is 35 for the front.

If you're tight on rear space you can always use several small AGM batteries in parallel (the types typically used in computer UPS untis).
These are small and can be mounted at any angle to there are lots possibilities for tucking them into spare corners or even using custom brackets and attaching them to the chassis somewhere.
The small ones use spade connectors so the wiring to each one can be smaller with a central connection point to the main battery cable.

Keep in mind that, with the length of cable run you are considering, you should be sizing for voltage drop more so than rated capacity - which means you should go 70mm2 for sure.

For my 100" Classic that would mean 6 metres, taking from the battery (Front RH side) down to and along the chassis to the towbar. (4.5 metres gives me the length, but no allowance for up/down/around)

At that distance and worst-case current - 450 A - would the body/chassis metalwork be low enough resistance so as not to make a differance, given the LR's traditional difficulty with sustaining 'good earthing' ...

Not that I'm in any way distrustful, but I reckon mine starts quicker since I ran a heavy lead from battery (-) to the alternator mount.

Anyway, using REDARC's calculator, 70mm would give a voltage drop of 0.655V at 450 amps.

At 300 Amp, this drops to 0.44V and at 250 Amp it's down to 0.36V

Handy Hints – REDARC Electronics

Yesterday I picked up 8 meters of 70mm, the bloke down there was very good, I had a couple of lugs crimped on to, unfortunatly they only had a larger size than I wanted, but thats been changed with a pressed in spacer.
I bought 8 meters and have it running over the top of the car for when its needed, and not secured on the car at all. Just need to try it out now on the rear. Thanks for your help, really apprieciated.