12v wiring for new fridge from old

[KevinW]

Hi
I have taken out an old 3 way electrical fridge from my 1991 Talbot took photos as I went along as it was part of a bigger refurb but come to put new fridge in where the new fridge has a black and a red wire to the 12v side, my old fridge had a blue/white stripe cable and a black cable any help would be appreciated as I need to finish the refurbished inn2 weeks for my holiday YES in the van .
Many thanks
Kevin

 

[wildebus]

Well, the new fridge wiring will be RED for +ve and BLACK for -ve, so you need to go on that basis.
You haven't said what kind of fridge the new one is. If it is a 3-way again, then yu can use the old wiring (assuming it was still working correctly, of course) but will need to double-check which wire is +ve and which is -ve (can't assume the black on the old one was -ve).
If it is a Compressor Fridge you are fitting, then you need to forget the old wiring (make sure you don't leave any bare ends though) and run new cable from the Leisure Battery to the Fridge.
For a compressor fridge, you should go for 4mm2 absolute minimum, 6mm2 would be better and if a fair length of cable, consider using 10mm2 cable. And again, if a compressor fridge, you need to consider if your battery storage is sufficient for your style of camping with that type of fridge - reckon on it using 40Ah a day if you are lucky, and more likely 50Ah per day.

 

[KevinW]

Hi
Yes correct for the new fridge which is a Smad 3 way, someone had added a red and a link from the black that was with the blue/white, which went to the igniter on the old 3way fridge