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Author Topic: battery cable  (Read 10863 times)

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davieboy0312

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battery cable
« on: 08 November 2015, 22:15:38 »
Needing a new battery cable as relocating battery to the boot. What would be the power rating required for it. Don't know how much the starter pulls at start up. I know the alternator is 170amp.

Just so I don't run into melting stuff  :-[
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05omegav6

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Re: battery cable
« Reply #1 on: 08 November 2015, 22:25:41 »
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davieboy0312

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Re: battery cable
« Reply #2 on: 08 November 2015, 22:30:53 »
Will that take the cranking power?
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Andy B

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Re: battery cable
« Reply #3 on: 08 November 2015, 22:39:36 »
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05omegav6

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Re: battery cable
« Reply #4 on: 08 November 2015, 22:43:37 »
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05omegav6

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Re: battery cable
« Reply #5 on: 08 November 2015, 22:44:42 »
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Andy B

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Re: battery cable
« Reply #6 on: 08 November 2015, 22:47:25 »
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Andy B

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Re: battery cable
« Reply #7 on: 08 November 2015, 22:49:07 »
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dbug

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Re: battery cable
« Reply #8 on: 08 November 2015, 22:54:28 »
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05omegav6

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Re: battery cable
« Reply #9 on: 08 November 2015, 22:58:25 »
Quote from: Andy B on 08 November 2015, 22:49:07
Quote from: Harris K Telemacher on 08 November 2015, 22:43:37
Quote from: davieboy0312 on 08 November 2015, 22:30:53
Will that take the cranking power?
Sorry, misread your post...

Try this...

http://www.ebay.co.uk/itm/BMW-7-Series-E65-LCI-Positive-Plus-Pole-Battery-Cable-Lead-Wiring-Loom-6904876-/231720917763?hash=item35f3a49b03:g:INYAAOSweW5VQCdT :y

£30 seems a bit expensive for a few feet of cable & a couple of eyelets  :-\
A few feet... length of a 7 series should reach down the middle of an Omega, and it's designed for the job ;)
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Nick W

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Re: battery cable
« Reply #10 on: 08 November 2015, 23:07:37 »
Boot mounted batteries need a high quality cable.
But that's readily available from truck factors(among others), who will sell it by the metre along with the appropriate fittings. A quick look through Car Builder Solutions catalogue has it for £6/m and fittings for £0.50 each - they're not exactly cheap, but are convenient for finding stuff. You can solder these, or crimp them if you have a suitable tool. I made mine, as the proper ones are seriously costly for something that I won't use much.


Don't forget you need the same size earth cable from the battery to the body, and at least one  from the engine to the body
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davieboy0312

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Re: battery cable
« Reply #11 on: 09 November 2015, 07:00:29 »
Cant remember where the body to engine cable lives. Know all those ones that bolt to the coil pack plate. Sorry guys cant remember seeing a thicker one  :-[
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05omegav6

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Re: battery cable
« Reply #12 on: 09 November 2015, 07:03:32 »
oppsing great big earth strap from the front of the sump to the subframe... :y
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davieboy0312

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Re: battery cable
« Reply #13 on: 09 November 2015, 07:16:31 »
You think I could run a negative length equal thickness to new positive. But bolt to the back of gearbox to battery?
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05omegav6

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Re: battery cable
« Reply #14 on: 09 November 2015, 07:31:46 »
Quote from: davieboy0312 on 09 November 2015, 07:16:31
You think I could run a negative length equal thickness to new positive. But bolt to the back of gearbox to battery?
Rear centre seat belt lower bolt would be my suggestion... You need a good solid connection.

Be careful with the routing of the positive cable... Straight down the middle of the car would be the best route, then up behind the cluster and through the bulkhead just outboard of the brake servo, along the chassis rail and u turn back to the starter/alternator...

Along the sill is potentially a liability ;)
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