What Fuse??? Help!!!

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The Badger

New Member
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117
Right, I'm installing some aux electrics in the 90, running them through an aux fusebox, to a switch, and then to the device, e.g (batt-->fusebox-->switch-->aux item) in this case 2 x worklamps, the lamps are 55w each, what fuse do I need to use? I know there is an equation relating to what fuse u need but I cant remember it??? :confused:
 
Right, I'm installing some aux electrics in the 90, running them through an aux fusebox, to a switch, and then to the device, e.g (batt-->fusebox-->switch-->aux item) in this case 2 x worklamps, the lamps are 55w each, what fuse do I need to use? I know there is an equation relating to what fuse u need but I cant remember it??? :confused:
watts/volts = amps so work out and use fuse just over and make sure cable ics capable of carrying amp rating greater than fuse
 
watts/volts = amps so 55w devided by 12v + 4.583 or 4.6v so a 5 amp fuse but you have to take into account other factors like temperature and resistance to earth so i would stick them both on a 10a fuse (use wire rated to 10 amps or over or it will act like fuse wire)
 
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