If you have an electrical box with wiring that is too short to make electrical connections to outlets, switches or even another junction box, you will need to add 'pigtails' to the wiring in order to lengthen the wiring so you can use it. The slice only goes down a few inches of the wire, so I am considering cutting this off and just adding a jumper wire to it to extend it the required three inches outside the box (there will be enough wire to add a nut). Is this legal (per NEC 2011)? Specifically I am unsure if this a violation of. I know that the general tactic for extending wires is using a J-Box, but it's against code to leave a J-Box in a location that's inaccessible without cutting drywall. If soldering Romex was a possible option, that would definitely be ideal. Learn more at: 10 Most Common Electrical Mistakes DIYers Make Do it right, do it yourself! Wiring problems and mistakes are all too common, and if left uncorrected have the potential. [0m:17s] Also, sometimes referred to as a jumper bar or terminal block jumper, a jumper is typically a short length of conductor, commonly copper, that is used to connect two or more points within an electrical circuit. You might be able to get some extra slack, strip it, and make your connections.