I have recently begun remodeling my Bath Room, I have completed everything I have experience in and only need one thing done before I can complete the project. I now need to move a 120V Outlet Wire, I will still need to use the outlet, so it seams best to just extend the current wire to the length needed, however I have never done this, my Father In Law is an Electrician, however schedules have conflicted for over a month and I must get the Bath Room done.
I am hoping someone can help in telling me how to add additional wire to the existing 120V Outlet Wire so I can move it out of the way and finish my Dry Wall.

Any help is appreciated.

FYI, junction boxes must be used when ever wiring connections are made up. Junction boxes are often just receptacle boxes left in place with access covers, then the wires continue from there. I strongly suggest that if you aren't familiar with the procedure you need to make time to get your Father in Law over there to do it for you. It's worth the wait to have it done correctly. Ask any fireman who has had to put out an electrical fire.

As Missouri said junctions must be made in a box. That box cannot be covered up or hidden the wall either. If having the box (with cover plate) visible is not acceptable, you will have to replace existing cable from where ever it is connected with a cable long enough to reach the new location.

This is the only device that is generally approved to be used within a wall to make splices, but the AHJ (Authority Having Jurisdiction) has the final say.

Modular Splice & Tap Kit - 194130062

Edit: For more information goto: Welcome to Molex and search for "the COC". The NEC reference article numbers are there too.

Thank you for answering my question, in my time, I have done many things to remodel a house, Electrical not being one of them. I think I will take your advise and just wait for my Father In Law, my Wife and Daughter can't afford for me to pull a Tim Allen...

Thank to all for the quick responses.

There are no devices allowed for splicing a wire in an enclosed wall. There may be devices which do the same thing as a junction box, but they must be accessible. You can use a junction box in a wall and cover it with drywall and or paneling, but the opposite side of the wall must provide access.