bigfoot4616
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| posted on 23/1/09 at 09:32 PM |
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wire size?
if a load on a circuit is 10 amps which will then have a 15 amp fuse protecting it, is it ok to use 16.5 amp cable or do i need a bigger difference in
rating between cable and fuse?
cheers
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Danozeman
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| posted on 23/1/09 at 09:34 PM |
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How longs the cable?
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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BenB
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| posted on 23/1/09 at 10:11 PM |
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Not unless you're replacing the UK-US fibre optic link with some good old copper 
16.5A is way enough for a 10A (expected) circuit.... Okay so a 15A fuse will temporarily pull more than 16.5A in a short circuit but the fuse will go
first...
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bigfoot4616
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| posted on 23/1/09 at 10:40 PM |
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quote:
Originally posted by BenB
Okay so a 15A fuse will temporarily pull more than 16.5A in a short circuit but the fuse will go first...
thats the bit i was worried about, wasn't sure if a 15 amp fuse would let enough currant through to melt the wire before blowing
cables about 3m max
[Edited on 23/1/09 by bigfoot4616]
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BenB
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| posted on 24/1/09 at 12:05 PM |
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I really wouldn't worry about it  Fuses are designed to blow in an over-current situation, cables aren't.... Going for a bigger cable
will just add weight to the car and provide extra protection for a situation that will never happen (ie where the weakest point in the wire/fuse chain
is the wire)....
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flak monkey
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| posted on 24/1/09 at 05:53 PM |
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I agree with Ben.
Modern thinwall 1mm cable looks thin and puny but will take 16amps no problem. Just wired up my whole injection system with it (nothing needs more
than a 10amp fuse) and wished I had done the rest of the car the same...another job for next winters list!
David
Sera
http://www.motosera.com
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bigfoot4616
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| posted on 24/1/09 at 08:16 PM |
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ok cheers
more wiring questions to come soon
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