Leeann wrote:
Try to figure out a different routing of the wire that's both safe and easier to maintain.
Sometimes you can securely attach a new piece to the old and pull it through, but if it's stapled along the way you can't do that.
Stapling usually should only be done on the solid, single-strand wires used on 120/240VAC systems, just like in houses. (These wires need to be fastened at regular intervals to keep them from flexing, which could lead to stress-induced breaks.)
12VDC circuits in motor vehicles should use stranded wire, which can stand up to vibration and flexing better than solid wire. Securing these loosely at periodic interval is a good idea to limit movement. However, surrounding structure is often enough to limit excess movement so many manufacturer forgo staples.
In some cases, the wrong type of staples (i.e., cheap staples) actually cause more problems than they prevent. In these cases, vehicle vibration causes the staple to cut through the insulation, resulting in a bare wire that could lead to a short circuit.
