2nd Leisure Battery fuses (1 Viewer)

[Revolvor]

I have just fitted a 2nd Leisure battery to my Autotrail MH, in preparation for fitting Solar Panels.

The 2nd battery is in a vented plastic battery box (approved for use by the US Coastguard!), close to the original which is set into the base of one of the under-seat lockers.

I followed best practice – ie connecting +ve feed to one battery and –ve feed to the other, and included a 40 amp fuse at both ends of the 16mm² Connecting Cables.

Broken Link Removed

For fuses I used these – bolted directly to the Battery Terminal clamp and the crimped cable terminal.

Broken Link Removed

I however have a couple of concerns now. Although I have supported the fuses, are they likey to “fatigue” due to vehicle vibration and fail physically?

Also, yesterday I read that fuses should never be inside a battery box, because of the presence of oxygen & hydrogen during charging. The standard fit on my Autotrail has four inline fuses in the battery box!

Am I worrying unnecessarily?

John

 

[Lenny HB]

If it's a fully sealed battery shouldn't be a problem, if the batteries are next to each other with short connecting leads not really necessary to fit additional fuses.

 

[CandC]

To give the fuses on my leisure battery install both mechanical and electrical protection, I used these fuse holders as so....

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[pappajohn]

Not good practise placing fuses inside a battery box.
A blowing fuse can arc and the batteries may be releasing gas.....but you will know soon enough if both these happen at the same time.
A maintenance free battery may still gas but any 'vapour' will be condensed within the venting system and returned to the cell.

 

[Techno]

Nil nada

Ditto

 

[Revolvor]

Thanks for all your advice guys.

I have removed the redundant 40 Amp fuses in the +ve link, and also managed to relocate all of the original build in-line fuses to outside the battery boxes.
John

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