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Old 13 April 2013, 17:44   #1
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Which wire / cabling

Hi, for my 1st project I am going to do the wiring from scratch but need to purchase the wiring from the list of electronic gadgets listed below. This is my best guess at the appropriate wiring but if I am wrong or don't know please advise what would be the most suitable as I need to get the wiring ordered in the next week.

1.) Nav lights +ve and -ve = 1.5mm tinned and multi strand wire
2.) Outboard +ve and -ve = 25mm CSA cable or 30-35mm tinned welding cable
3.) Wiring from battery to fuse / distribution board +ve and -ve = 10mm tinned and multi strand
4.) Sonar, VHF, Stereo, Aux/cigar, Chart plotter to fuse / distribution board +ve and -ve = 5mm tinned and multistrand

Thanks

Gareth
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Old 14 April 2013, 14:15   #2
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Hi folks any help please or am I asking a stupid question because I haven't specified exact current draw of electrical equipment it is difficult to know what rating of wire to go for? Thought current draw on the electrical equipment would be pretty generic?

I appreciate its a boring post but its the first time I have done any wiring in a boat

Thanks

Gareth
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Old 14 April 2013, 14:27   #3
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1) Nav lights probably fine with 1.5mm2
2) Outboard - I'd use a min of 25mm2 but probably better with 35mm2
3) 10mm2 sound far to big unless the fusebox is miles from the battery. If it is only a metre or so then 5mm2 would probably be fine.
4) For short runs 1.5 or 2mm2 would be fine for the current draw on most electronics assumin each one is fed and fused separately.

HTH, but can only be more specific by knowing the length of run and power draw.
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Old 14 April 2013, 14:27   #4
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All the tinned wire I buy is american gauge, so i use this....

Three Percent Voltage | Marinco
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Old 14 April 2013, 14:30   #5
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Yeah, forgot to say only use tinned if you want to rely on it long term.
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Old 14 April 2013, 15:16   #6
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Thanks Erin / Dirk Diggler, that is a great starting point for me
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