Join Date: Aug 2005
Location: Orangeville, Ontario, Canada
Re: Fusing. IMHO I would fuse the power supply at 115% of its normal typical load, regardless of where you are taking the power from. First, if this new fuse blows it will indicate exactly where the problem is. Also remember the fuse id to protect the wire and not the load, but when fused close to load it may help resolve a load issue. If no fuse and then the main supply pops, what caused it? That main supply protects wiring in general and must protect the smallest wire. You can never over fuse, jut use the correct type, fast blow vs. slow blow and the correct fuse holder.