Blowing Fuse

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maingate said:
The '25 amp rating' is the maximum permissible size, not necessarily the correct size. If the fault is related to a failing 12 volt Element in the fridge then installing a bigger fuse could be dangerous.
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Which is why say we need to know the Fridge specification.

It the fridge does draw 15a as Fisherman suggests and Reserve 4 circuit contains wiring cable suitably sized for 25 amp (the implication from that being the recommend size ) then he symproms are explained and the solution is a 25a fuse. But for the umteenth time we did to know what the fridge spec is.
 
QFour said:
I would have thought the sensible thing to do was fit a 20A fuse first and see what happens. 25A fuse is a bit big for thin wiring.
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The reserve 4 is specified 25 amp and the wiring protected by this should be a suitable gauge. The OP can't tell us the power usage of the fridge, I don't fancy asking him about wire gauges and run lengths.
 
I know that uprating the fuse can be dodgy.
But I have been around 12v alarm installations for over 30 years.
In my experience if a fuse breaks its due to simple overload.
If it’s more serious the fuse is vaporised.
I think under careful supervision a larger 20 or 25a fuse should be fitted.
Such a fuse would still be the weakest point within the circuit, and would blow before any damage was done. But supervision is important.
 
Info from inside of fridge..


fullsizeoutput_a6a.jpeg
 
on earlier post it was stated that 170W divided by 12v = 14.16

does anyone agree with this...15amp fuse not big enough ??
 
Surly it’s a simple matter try the 20A fuse, if you have a short on the wiring it could cause damage.
Many car fuses are of inferior quality a poor fuse blade and socket can cause overheating at 14+ amps plus the poor connection would suggest a 15A fuse would take a short time to blow.
Try a 20;A if OK and you feel confident swap the cable to one of the spare fuse holders.
Please take care in buying replacement fuses.

Alf
 
Useful info all round including the recommendation to get "Good quality fuses"
Reminder to self to check my Fridge details and relevant/all fuses.
I have a Calira Power Unit but the manual has the details.

Where can you get quality fuses ? Halfords ? (obviously not Poundland or the like !)
 
jagmanx said:
Useful info all round including the recommendation to get "Good quality fuses"
Reminder to self to check my Fridge details and relevant/all fuses.
I have a Calira Power Unit but the manual has the details.

Where can you get quality fuses ? Halfords ? (obviously not Poundland or the like !)
Click to expand...

Halfords sell only fuses that meet EN and BS standards.
 
Hi everyone
Does anyone have knowledge of Mazda Bongo campers, the heating & air conditioning not working, it's digital not Manuel.
It's freezing cold so no trips until get resolved, longing to be out in Bongo..
Cheers 🍻
BardotBongo
 
shortcircuit said:
A word of caution. The fuse is there to protect the wiring and not the appliance. Keep on increasing the amperage and you could have serious consequences as alluded to in previous posts. Far better to find out why it is blowing.
Click to expand...

It was blowing because a 15a fuse was used in error.
A 20a fuse is recommended by domestic.
the fridge draws 170w at 12v.
 
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