battery relocation

[geesus69]

right, after searching and reading numerous threads i'm still not sure what i need to do this: (apologies for bringing it back up again )

a) successfully
b) quite cheaply
c) and most importantly..... SAFELY!!

right so things i know i need:

battery box
length of power cable from front to back of car
small length of earth cable
terminals (if not using originals)

now do i need to fuse it near the battery? and what size fuse will i need?
do i need some safety cut off switch/regulator? (heard someone mention this)

anything else i need?

 

[edde]

Do a search fred gave a bit of a guide some time back its easy though.

 

[mini-valver]

I haven't used a fuse. Just connect the power lead to the original and run it through to the back, earth it at the back and whack the battery in a box. Its really that simple, lol.

 

[Dink]

i'd fuse it at both ends tbh

basically you need a fuse that won't operate when starting and a cable that is the right size for that fuse

 

[Djw John]

What size of cable is ideal? And 60amp fuse?

 

[mini-valver]

I used Autoleads Speaker cable, the thick red stuff. No fuse a. it's fused at the fuse box anyway/

 

[Dink]

i'd have at least 4 a.w.g (25mm2) and a 100A fuse either end.

 

[Lagerlout]

Definitely fuse as close to the battery as possible imho. If you get a short anywhere in the cable between the battery and the fuse in the front.... things could get messy lol

 

[ditz]

just use the renault battery terminal in the back, join that to your new wire and run that forward

the standard renault terminal is fused. that way if it shorts anywhere from the battery forward you'll be fine

 

[wallop]

I will post a basic wiring diagram later, obviously I'm not entirely sure just how many batt lives you have, so with regards fused distribution it's merely a guess.....

 

[wallop]

I haven't used a fuse. Just connect the power lead to the original and run it through to the back, earth it at the back and whack the battery in a box. Its really that simple, lol.

Oh dear, hope you carry an extinguisher.....

you need to remember current is flowing from two directions, when starting the current comes from the battery, whilst running the current flows to the battery.....This means the cable should be fused at its power source, (the cable has a source at each end, alt under the bonnet, battery in the boot)....

each individual power cable should be fused at a relevant rating, the current draw during starting is fairly high, when you also consider the distance it now needs to travel, (higher resistance), you can appreciate 4awg won't really cut it.....

you also need to consider the present battery wiring, few cars have only one live feed, the easiest way to sort this is a fused distribution block, very few of these are actually water tight, so I would suggest these feeds are taken into the cars cabin and tucked away behind the glove box.....

the next point to remember is that these feeds will be powered from both the battery & alternator, so the batt & alt should be directly connected.....

So, onto wiring;

Alt charge lead through the bulkhead into fused distribution block---0awg,(150amp fuse at alt)
Battery positive terminal to fused distribution block---0awg, (150amp fuse at battery)
Upgrade engine to chassis earth---0awg, (also alt earth if fitted).
Battery earth terminal to boot floor---0awg

STINGER FUSED DISSY BLOCK

Extend all other battery lives through the bulkhead and connect each to seperate fused outputs.....

not got time to do sketch at present, but your probably reeling at the cost, let me know if you still require the sketch.....

 

[wallop]

OK, done a basic pic showing a 'SAFE' way to relocate the battery....

the RED lines coming from the fused block are to supply current battery lives.....

the EARTH distribution is simply to neaten up your current battery earth connections.....

In the pic the ALT charge cable is protected by a 100amp fuse, (this is a MAX rating if opting for a 4awg charge lead, if opting for 0awg go with 150amp fuse).....

the Starter should be fused at around 100amps, (use 4awg cable minimum).....

HTH....

 

[geesus69]

right basically the parts i have got are

25mm2 230 amp rated cable
100 amp circuit breaker
distribution block (not fused)
GRP battery box

safe enough? or am i going to fry? lol

time for a plumbed in fire extinguisher?

edit: i need a 100A fuse to go inline with the alternator dont i? then im good to go?