On 29 December 2013 05:34, David VanHorn wrote: > Corrosion problems can pop up when you are passing current through areas > where it wasn't intended to go. My gear takes hot and ground directly > from the battery, with fuses in both lines. Pros & cons, as ever. A fuse in the ground lead means that the whole piece of equipment may float to Battery + if the ground fuse blows and the battery fuse doesn't. Sizing the ground fuse larger than the battery fuse by a factor of 2 or so, or making the ground fuse 'slower blow' than the battery fuse may be useful. Or not :-). Best of all, perhaps, a double poile interrupter that isolates bot leads during a fault. Russell --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .