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Fuse size recomendations starter curcuit
neo2 - 28/7/10 at 08:20 PM

Hi guys ive just completed my reverse gear starter motor set up and used a large blade fuse holder inline next to battery just in case the wire gets rubbed through or solenoid gets damaged etc for safety reasons...

Ive tried a 30A,40A,50A fuse but they all blew on actuation of the reverse starter..

So i am assuming its going to be a big blooming fuse anoyone got any idea or is it a case of just trying a bigger one in still it dont blow it lol...

Using a golf starter motor..

i'm sure it said 1.1kw on it what ever that means if anything ??


blakep82 - 28/7/10 at 08:25 PM

starters aren't normally fused are they?


neo2 - 28/7/10 at 08:28 PM

Not sure but i added the inline fuse as the soleniod sticks out the cars floor and if it got hit on a bit of debris or something it could damage the soleniod with a positive battery lead direct from the battery dangling about ready to set fire etc..


nitram38 - 28/7/10 at 08:29 PM

Generally not fused, but the solenoid circuit might.


scudderfish - 28/7/10 at 08:29 PM

1.1kW at 12V would be 92A so you're looking at 100A to fuse it.


big_wasa - 28/7/10 at 08:34 PM

At least 150a fuse due to initial surge.


bi22le - 28/7/10 at 08:42 PM

You can get large blade fuses and they may go to 150A. I only see 80A ones though.


scudderfish - 28/7/10 at 08:47 PM

Theoretically, you could use multiple fuses in parallel....


neo2 - 28/7/10 at 09:10 PM

cheers guys ive also fused the soleniod curcuit as well tried a 10A but it blew that but 20A is ok so far... for that anyway..

92Amp = 1.1kw @12v = very good i tried to work it out but failed lol thanks mate..

Fuses go upto 160A apparently but got to find the buggers now lol...

cheers Guys


40inches - 28/7/10 at 09:12 PM

150amp continuous mega fuse,+holder

Mega Fuse (now 250amp)
Mega Fuse (now 250amp)


JoelP - 28/7/10 at 09:25 PM

what size wire feeds the starter motor?


40inches - 28/7/10 at 09:29 PM

I used 25mm, it's a long cable run.


loggyboy - 28/7/10 at 11:14 PM

As mentioned above mega fuse-

I used these when I extended my loom in my tintop when i moved the battery behind the passenger seat.

Try here:

http://shop.ebay.co.uk/i.html?_nkw=mega+fuse+&_cqr=true&_nkwusc=megafuse&_rdc=1

[Edited on 28/7/10 by loggyboy]


Canada EH! - 29/7/10 at 01:19 AM

What about a circuit breaker, automotive ones are small and once the load is removed they re-set. good for high load circuits.


britishtrident - 29/7/10 at 11:07 AM

A starter motor can draw 200 amps


Dan. - 29/7/10 at 07:57 PM

Look on car audio sites, ANL fuses can be had upto 350 amps iirc.
http://www.caraudiodirect.co.uk/accessories/fuses/anl-fuses.html
But as said by others starter circuits are not normally fused.

[Edited on 29/7/10 by Dan.]


neo2 - 29/7/10 at 08:17 PM

Got a couple of 100A fuses today i'm now wondering if the holder will take the amperage what you's think.. Might got to Mega fuse as recommended.. breaker sounds good as well like...

cheers Chaps