Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238
Battery and Electric cable size and sourcing
I'm in need of some decent gauge battery cable to run from D3 battery to the trailer battery and also some general wire for powering usb/cigarette sockets for trailer.
So:-
1. Does anyone know what gauge I need for the battery i.e. What is already on the D3. As both batteries will be fed from same alternator I'm guessing safest bet is to match the tow vehicle cable. I'm thinking probably 40mm Square?
2. What size cable for cigarette socket. I'm thinking 4mm square?
3. Anyone got a source for all above and reasonably priced? And if my metric sizes are correct, what is equivalent gauge (not important, just for interest?).
I need about 16 metres of black and red battery cable and probably about 10 metres of the smaller one.
Ta in advance.Cogito ergo sum!
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20th Feb 2018 8:56 pm
Luapno
Member Since: 27 Sep 2013
Location: Birmingham
Posts: 871
Used these in the past for connectors and cable http://www.polevolt.co.ukWhen you are dead, you do not know you are dead. All of the pain is felt by others. The same thing happens when you are stupid.
20th Feb 2018 9:35 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10379
What are you trying to do with your trailer battery ?
What's on your trailer?
20th Feb 2018 10:21 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
I might be wrong here but I think you only need cable the same as that’s on the alt rather than the big cable that goes to the starter.
Pete.IID, webasto software and workshop facility's available.
20th Feb 2018 10:36 pm
abermarc
Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238
I'm happy with the setup as I've done same on previous LR/trailer combos. In simplest terms I want to send twelve volts direct from battery on the D3 (via split charge solenoid) to the trailer battery on the trailer when engine is running whilst vehicle in motion via anderson connectors during which time there will be no draw off the battery in the trailer (which incidentally only powers some USB lights, a fridge and charges our phones overnight).
On my last two LR/Trailer combos I took a tip from someone and just purchase two sets of HD jump leads and chopped the clips off each end and voila, cheap cable and the correct thickness. However, on this occasion I got burned!! I bought these off Amazon and they were rated as HD 800 amp......80 more like.....if your lucky!!!!
So this time I was thinking lesson learnt just go and buy the proper cable first as last and be done with it.
I could even use these for my cigarrette socket there's so little copper in them!!!!Cogito ergo sum!
Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer
20th Feb 2018 10:54 pm
Sydney
Member Since: 11 Aug 2013
Location: St Neots
Posts: 903
I've used Vehicle Wiring Products for years and never had a problem with them.
who supply components and make wiring looms to order.
They too are highly recommended.
NJSSAm I Gammon or Woke ? - I neither know nor care.
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2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
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21st Feb 2018 5:16 pm
abermarc
Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238
Lots of votes for Vehcile Wiring Products from here and elsewhere. Seems I'll get what I need from them this time around.Cogito ergo sum!
Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer
21st Feb 2018 5:48 pm
armalites
Member Since: 17 Aug 2013
Location: Herefordshire
Posts: 1918
If you want battery level cable IE 35-40mm2 then the major players like AES and Vehicle Wiring Products are expensive at £9/m. If you buy on ebay it can be had for £4.5-£5/m delivered if you buy 10m. If buying this kind of stuff then you need to factor in a proper crimp tool.IID PRO
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21st Feb 2018 5:59 pm
abermarc
Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238
Proper crimp tool already in toolbox As I say I've done this before, just used a different source for cable before and got let down this time around. I'll take a look on ebay too though, thanks.Cogito ergo sum!
Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer
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