That type is not going to stretch the terminals in your fuse box because you're not doubling up any terminal. On this style, the wire is attached to the terminal on the left. You wont even need a voltmeter or test light. Just install the insert with no fuse. The pigtail will supply power to your accessory when you have the unit inserted the right way. The original circuit will work normally when you pop the fuse in.
Getting it right isn't a real big deal. The concern is lets say you're putting this tap in place of a 10-amp fuse and that circuit actually draws five amps. If your added-on circuit draws six amps, you'll blow the ten amp fuse.
Monday, October 1st, 2018 AT 11:14 AM
(Merged)