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SELV Fusing

Martyn

Hi All,

I recently had a discussion with regard to fusing SELV lines, traditionally I always fused the +ve line feeding equipment.

A colleague recently mentioned that he had read an article from Sage? Arguing that both lines should be fused, from memory this ties up with 60204:2019.

A bit of thought suggests this would be wise as obviously with SELV there is no ref to earth for ADS. 

I cannot find the article, can anyone point me in the direction of some relevant info.   

Thanks

Martyn

Parents
  • 0

    Generally vehicle and trailer electrics do use a chassis return

    In (touring) caravans it seems that they usually have two distinct systems - one for the 'road' - mostly the road lights (side lights/indicators/brake etc) but also the 12V feed to the fridge for use when moving, which is often chassis return (in common with the tow vehicle), and then there are the 'leisure' circuits fed from a 12V leisure battery (or mains fed PSU/Zig unit) which supplies the caravan's internal lighting, pumps and so on - which are invariably have an all insulated 2-wire system to keep it deliberately separate. (Although there are times where the internal leisure system is connected to the tow vehicle's 12V system - e.g. to recharge the leisure battery when on the road - just to make conventional definitions tricky to apply!)

       - Andy.

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  • 0

    Generally vehicle and trailer electrics do use a chassis return

    In (touring) caravans it seems that they usually have two distinct systems - one for the 'road' - mostly the road lights (side lights/indicators/brake etc) but also the 12V feed to the fridge for use when moving, which is often chassis return (in common with the tow vehicle), and then there are the 'leisure' circuits fed from a 12V leisure battery (or mains fed PSU/Zig unit) which supplies the caravan's internal lighting, pumps and so on - which are invariably have an all insulated 2-wire system to keep it deliberately separate. (Although there are times where the internal leisure system is connected to the tow vehicle's 12V system - e.g. to recharge the leisure battery when on the road - just to make conventional definitions tricky to apply!)

       - Andy.

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