fuses blowing.

Graham I W · May 28, 2009

The split charge system I fitted keeps blowing the fuses. Wired it up the same way as it shows on the marcel leisure page, I used two inline 30 amp fuses before and after the relay. The relay is a heavy duty 100 watt. As the two batteries are sitting next to each other I linked the earth from one to another. The live to switch the relay comes from the cig lighter. The two 30 amp fuses, both got hot but the one before the relay was the one that blew, the other shows signs of getting hot. Any suggestions for this happening? Do I need to get a heavier guage wire?

Thanks

Graham.

G-man · May 28, 2009

sounds like you are putting too much load through the wiring! they shouldn't blow like that are you sure its wired correctly? post a picture of your wiring and let me know where each wire goes

The Mad Hat Man · May 28, 2009

Graham I W said:
The split charge system I fitted keeps blowing the fuses. Wired it up the same way as it shows on the marcel leisure page, I used two inline 30 amp fuses before and after the relay. The relay is a heavy duty 100 watt. As the two batteries are sitting next to each other I linked the earth from one to another. The live to switch the relay comes from the cig lighter. The two 30 amp fuses, both got hot but the one before the relay was the one that blew, the other shows signs of getting hot. Any suggestions for this happening? Do I need to get a heavier guage wire?

Thanks

Graham.

"the relay is a heavy duty 100 watt" - this is only 8amps!!!! - do you mean 100Watts or 100Amps?
There is no point in having a 30A fuse both before and after the Relay.
What items are you running from the secondary battery?
What wire are you using?

Graham I W · May 28, 2009

12volt 100amp relay, sorry for confusion.

Graham I W · May 28, 2009

I run the inverter which has 1800 watt output,from which I run 110 transformer to run 5 inch grinder and various drills and I am trying to avoid running the engine while using power tools. A small 12 volt fridge for drinks and some other bits and bobs while camping, pump for air bed etc.

wiltshire landyman · May 28, 2009

can i ask why you have a fuse b4 and after the relay?
what guage wire are you using?

G-man · May 28, 2009

http://x-eng.co.uk/Instructions/X-Charge.pdf

The Mad Hat Man · May 28, 2009

wiltshire landyman said:
can i ask why you have a fuse b4 and after the relay?
what guage wire are you using?

No - coz i did in post #3.

Graham I W · May 28, 2009

I looked at marcel leisure page, their diagram shows inline fuse either side of relay. I used the 12 awg wire that came with fuse holder, I am thinking that maybe its too light.

The Mad Hat Man · May 28, 2009

Graham I W said:
I run the inverter which has 1800 watt output,from which I run 110 transformer to run 5 inch grinder and various drills and I am trying to avoid running the engine while using power tools. A small 12 volt fridge for drinks and some other bits and bobs while camping, pump for air bed etc.

if watts = volts*amps
then 1800 = 12*Amps
so Amps = 1800/12 or Amps = 150

so a 30Amp fuse aint gonna be very good is it?
neither is the relay

or, most likely, the cable!

hope yu gorra fire extinguisher to hand

fuses blowing.

Graham I W

Active Member

G-man

BBQ king

The Mad Hat Man

Well-Known Member

Graham I W

Active Member

Graham I W

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wiltshire landyman

I’m back

G-man

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The Mad Hat Man

Well-Known Member

Graham I W

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The Mad Hat Man

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