What fuses from leisure battery?

[jonnyboy1958]

Hi all, I need your advice again. I am wiring my van with a leisure battery and will have a fuse box (12 volt) from the battery but I wanted to put in-line fuse directly on the battery leads. It is a 110 amp battery and I will be using heavy duty cable. Can anyone tell me of any particular type of fuses are good/recommended?

[NickJ]

It depends what the end use is for the circuit from the battery.

In my van I have a mechanical split charge switch. That has a 60amp maxi fuse. That circuit is purely to charge my leisure battery through.

My "house" electrics are fed with pretty decent cable to a blade fuse board. On the live side from the battery I have daisy chained each fuse inlet. Then I put in the relevant fuse for each curcuit from that depending on the end use appliance. Currently I only have LED lights and a small ventilation fan each with a standard 5 or 10amp blade fuse.

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[hectors-tranny]

I used a 25A fuse between my leisure battery and fuse box. It needs to be sufficient to cover the maximum anticipated power draw of all your devices. The cable rating must also be higher than the fuse rating (so the cable doesn't heat up and melt before the fuse blows). You should also place the fuse as close to the positive terminal as possible, to minimise unfused cable run.

Fuses between leisure and starter battery positives and split charger were 40A. Again cable rating must be well above that.

The rating of your battery in amp hours has nothing to do with your choice of fuses (that is just it's capacity).

I ordered a custom split charge kit from 12V Planet. They take care of cable capacities, fuse ratings etc, and make it up for you with your desired cable run lengths. I found them very helpful. http://www.12voltplanet.co.uk/split-cha ... asure.html

[jonnyboy1958]

Thank you for your replies they are much appreciated.

[ake]

Remember you need a fuse at each end of the cable between batteries

[jonnyboy1958]

should the earth be fused as well?

[ake]

should the earth be fused as well?

No need if the positives are fused.

[jonnyboy1958]

Thank you for your replies