Fuse for ARB Fridge
Submitted: Sunday, Apr 06, 2014 at 13:20
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TTTSA
Looking for some advice on fuses.
I just finished installing a twin 6 B&S loom to the rear of my Cruiser for the fridge, sick of the dramas the smaller cabling was causing me.
This loom came fitted with a maxi blade fuse holder which I have just discovered that 20A is the smallest fuse they make in Maxi fuses. Reading the instructions for my 78lt ARB fridge it says to use a !5A fuse.
Is a 20A "safe" to use or not?
Regards
Peter
Reply By: The Bantam - Sunday, Apr 06, 2014 at 16:54
Sunday, Apr 06, 2014 at 16:54
Let me explain the basic principles of fusing.
Where there is a single supply...we fuse to protect the down stream CABLING.
So as long as the fuse is larger than the current demanded and smaller then the current carrying capaity of the cable you are safe.
If an appliance requires a fuse, it should be either in the appliance or in the appliance connection cord..preferably in the appliance..and that fuse protects the down stream load.....that that is beyond the fuse.
You do not need to have a fuse both ends of a cable unless there is a source of supply both ends...like in a dual battey situation.
As for this need for a dedicated feed.....ahh take that with a grain of salt.....it may have been true if you where running 6mm automotive 4.5mm2 as a dedicated fridge feed........but if if you are running #6 that should support more than a fridge no problems...
#6 is about 13mm2, and rated at 125 amps.....over the length of the car you should be able to pull 40 or 50 amps out of that with little or no issue with voltage drop.
If you want a switchboard at the place where you have your fridge to deliver other loads as
well ...that should not be a problem
cheers
AnswerID:
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Follow Up By: TTTSA - Sunday, Apr 06, 2014 at 17:09
Sunday, Apr 06, 2014 at 17:09
Thanks for that Bantam.
I understand That I don't "need" a dedicated feed with 6 B&S cable, just making sure that it fixes the problem.
I stuck with the 60Amp fuse at the battery end and I wired in a 15Amp fuse between the Anderson plug and the fridge at the fridge end.
Should be up to the task I think.
Regards
Peter
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