WARNING!!!
You are playing with death to you, your family, and all who visit your home if you proceed alone!!!
To install the electric supply yourself is the most fool-hardy thing you could possibly do, unless you or anyone else who wires it up, know completely what they are doing, and are suitably qualified
There is a multitude of regulations on this type of installation designed to protect you and your familys life, which I am confident you know nothing about. (no disrespect intended)
You need to get a professional in to do this job who has knowledge of NICEIC regulations as it must conform to BS7671.
Apart from risking death, you would also invalidate your home insurance should your house burn down, not to mention criminal proceedings for manslaughter.
This is not an area to cut corners on, and tho I could advise you in part, I could not give a full 'how-to' without firstly inspecting your electrics.
Just consider this fact "WATER, PLUS ELECTRICITY EQUALS DEATH EVERY TIME! (ask anyone who has ever been seated in 'Old Smokey')"
p.s. i felt so strongly about this, that i joined specifically today to warn you!