iggy Posted December 26, 2016 Share Posted December 26, 2016 Im planing on moving the battery to the boot of my mk2 2500, ive got a few metres of arc welding cable in t he garage which is marked with 25 i presume this is 25 mm2 is this ok to use as the positive cable from the battery to the starter motor, other wise ive seen 110 amp or 170 amp battery cable for sale, but i think it wont be as flexible as the welding cable, which cable and what amperage should i use, any advice appreciated Quote Link to comment Share on other sites More sharing options...
TedTaylor Posted December 26, 2016 Share Posted December 26, 2016 25mm2 welding cable should carry something like 180 amps with very little current drop over the lengths you would be using so will be MORE than adequateThis is what I put into AFH 25 years ago and had no trouble during the six years I used it before the (very) long layup, and I will be simply re-instating it when I am able to get back into the rebuild after the knee replacement op next month.MUT Quote Link to comment Share on other sites More sharing options...
iggy Posted December 26, 2016 Author Share Posted December 26, 2016 ok thanks Ted hope the knee opp goes well Quote Link to comment Share on other sites More sharing options...
iggy Posted December 27, 2016 Author Share Posted December 27, 2016 Ive found 3m of 20mm2 weiding cable 135 amp could i use this as its a bit thinner and easier to fit Quote Link to comment Share on other sites More sharing options...
ferny Posted December 27, 2016 Share Posted December 27, 2016 Get some from here;http://www.12voltplanet.co.uk/plain-copper-battery-cable.htmlI put mine in the boot about four years ago and I'm certain the cable was larger than 25mm². I got about 0.2v drop at the headlights when I checked before putting in relays. Quote Link to comment Share on other sites More sharing options...
iggy Posted December 27, 2016 Author Share Posted December 27, 2016 Thanks Ferny voltplanet very helpfull web site i found the calculator for cable sizes just need to find out the amperage draw of my statermotor under load Quote Link to comment Share on other sites More sharing options...
Clive Posted December 27, 2016 Share Posted December 27, 2016 No, that is unlikely to be enough. Just get way bigger than you need from he calculations. That way, when the car needs turning over for a bit to get started, it won't get the cable (as) hot, which slows the starter down.I would run the 25mm2 stuff.....or bigger. Quote Link to comment Share on other sites More sharing options...
iggy Posted December 27, 2016 Author Share Posted December 27, 2016 Yes il stick with 25mm2 cable im going to run it inside the car and fit an isolator switch, ive just got to see if the 25mm2 cable will go through a grommet just to the left of the steering collum 🙂 Quote Link to comment Share on other sites More sharing options...
bob dunn Posted January 12, 2017 Share Posted January 12, 2017 The battery looks like it is in the wrong place(as standard) , but is there a practical reason for moving it . Quote Link to comment Share on other sites More sharing options...
ferny Posted January 13, 2017 Share Posted January 13, 2017 For me - I needed that section of bulkhead for extra electrics. Quote Link to comment Share on other sites More sharing options...
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