How do I install a new electrical outlet? Answered
I need guidance on how to install a new electrical outlet to an existing wall. My bathroom only has one electrical outlet, and it's located on the vanity light over the sinks (see photo close-up of light outlet on outdated fixture with rad vintage pastel ikat wallpaper).
Usually this should be pretty easy, since there should be an outlet on the other side of the wall that you can just tap in to; but there's no outlets on the other side of any of these walls (see wall descriptions below). There are electrical wires running through these walls though, powering lighting and heating. So, can I just cut a hole in the wall, reach my hand in, grab a random wire, cut it, splice in wiring to a new outlet, and magically everything works? Probably not that simple. I can grasp the basics involved in this, but I'm not 100% certain on how to proceed with my situation since I don't think I need to deal with feeding up new separating wiring from the basement but I also just can't easily tap into an adjacent existing outlet.
There's 2 switches at the bathroom entrance: one for the lights, one for the bathroom fan. The light switch controls 2 light fixtures: the one overhead light (it's a light/fan combo) as well as the lighting above the sink. See scan image for rough sketch of current electrical floor plan.
Wall descriptions based on sketch:
Left wall: interior wall; on other side of the wall is an electric baseboard heater; door to hallway
Bottom wall: exterior wall; window
Right wall: interior wall; adjacent room is unfinished "attic" area above garage with sloped ceiling*
Top wall: interior wall; adjacent stairwell; wall-mounted light fixture with outlet; small under-cabinet baseboard heating vent thing
I would like to know if/how I can tap into the electricity of that sink light fixture to be able to relocate the electrical outlet lower, closer to the sink counter, and possibly off to the side (so, not central to the counter as it currently is). See scan image for rough sketch of proposed electrical floor plan (ignore birds, I was using scrap paper). I realize if I were to relocate it off to the side, I'd need to drill through studs and make more more holes in the wall, but that's fine, as I was thinking of creating storage space between the studs anyway.
I'm planning on replacing the current sink light fixture with either a) another wall fixture in the same location, b) 2 separate wall fixtures, one above each sink, or c) 3 separate wall sconces, a leftmost one, a center, and a rightmost one. I haven't decided on what will look and function the best.
I'm sure there was a much more succinct way of asking this question and describing my situation, but I am clueless about electricity and wiring and whatnot. Despite my inexperience and ignorance I still feel like this is a task I'm capable of, but I'd like to seek the guidance of you wonderful Instructables' folks on how to do this. I'd like to know where you think the outlet(s) should go based on the information I provided, and then how I get the power to that outlet without electrocuting myself and frying the house.
* I first was going to say that this attic ceiling outlet is the nearest thing to an adjacent outlet, but I just remembered there's an outlet at the top of the stairs, adjacent to the attic (meaning, not on the other side of a bathroom wall). The attic ceiling outlet is controlled by a light switch inside attic entrance anyway, and this is an insulated roof wall too.