Newboy Posted August 11, 2004 Report Share Posted August 11, 2004 Just been told by an auto electrician that I should protect my circurtaries with fuse on -ve as well as the +ve side. Also, does it matter which side (before or after an acc) a switch is positioned? Quote Link to comment Share on other sites More sharing options...
Afishionado Posted August 11, 2004 Report Share Posted August 11, 2004 Just been told by an auto electrician that I should protect my circurtaries with fuse on -ve as well as the +ve side. Also, does it matter which side (before or after an acc) a switch is positioned? Fuesed on both sides?? I have never heard of that. As we use DC, the current is only running one way so the fuse protecting the appliance should be before the unit and at an amperage that will blow before overload damage can happen. Once the current has gone through the application it is working, a fuse is pointless, as an overload would have hit milliseconds before it blew. And with electronics a nano second overload is enough to spoil it's day. Switches must always be fitted before an application. Otherwise the application could become live if accidentally earthed and sea water is good at giving earth tracks that you don't want. Mad Mike PS Not that any one minds answering your questions mate but over the years I have found my local library a valuale source of knowledge. If they have a copy 'Boat Electrics' by John Watney, this was the primer for a lot of what I know Quote Link to comment Share on other sites More sharing options...
Newboy Posted August 11, 2004 Author Report Share Posted August 11, 2004 Thanks Mike. Quote Link to comment Share on other sites More sharing options...
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