Electrical fire

Pecky

Forum Member
Joined
Aug 1, 2008
Messages
71
Location
Perth - Western Australia
Car Year
2016
Car Model
Forester - diesel
Transmission
CVT
[FONT=&quot]I managed to set fire to my car by not having enough fuses to cover all power sources.
I have a second battery for my fridge and on the battery cover I made for it I have a circuit breaker and a cigarette lighter socket and a socket for the Waeco fridge plug. When I put the fridge plug into the socket I must have held my tongue the wrong way as the positive contacts in the centre of the socket touched and welded to the negative surround contact. No problems as the circuit breaker tripped and isolated power from the fridge battery.
BUT
I also have a small 7 A/Hr battery to run my camping lights that is plugged into a connection by the rear cargo area cigarette lighter socket [/FONT][FONT=&quot](see picture)[/FONT][FONT=&quot]. This battery has no fuse and was then feeding back to the shorted socket on the fridge battery . The car soon filled with smoke as the insulation to this battery melted and caught fire. I rushed out and grabbed my fire extinguisher and was just about to use it in anger but first I ripped the wires off the small battery. Luckily they are held on by 'spade' connectors and disconnected easily which removed the power and I was able to blow the remaining flames out.
Needless to say this small battery now has its own fuse as does the wire that feeds it from the fridge battery circuit.

So make sure all your power sources are protected by a fuse or circuit breaker and avoid this potential disaster.

cheers
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Last edited:
Oooo -bugger! A timely warning methinks.
 
Sorry to hear this. Glad you got it under control before it got too bad and you were able to fix the problem.:)
 
Info on 12v. accessory wiring...

Anyone wanting DIY info on accessory wiring (or just background to ensure that an auto elec doesn't dud you by using 'metal thread' rather than cable :madred: ) you should check out the electrical thread on https://myswag.org/forum/ or the circuit diagrams for the kits on https://www.traxide.com.au/index.html

In all cases however, fuse or circuit breaker as close as possible to the +ive terminal of all batteries! :iconwink:
 
Some basic maths will do wonders for calculating fuses. Watts divided by volts will give you amps. Make sure the cable is up to the task. Don't be fooled by el-cheapo thick wire where most of it is insulation and hardly any is copper. If you make sure the insulation is protected from sharp or abrasive contacts as well, you should be ok. If in doubt, leave it to the auto electrician
 
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