It is the word "I" that is a problem. Can what you ask be done. Yes but there are regulations controlling this which should be followed.
There is a link to Part P on projects. I would follow link and down load free document about Page 23 it shows you the paper work required if you think you can complete this then may be worth continuing but I would suspect you will find it more prudent to use a reg electrician.
Sorry no pictures or links. Some times one get through but normally stopped. You need a local isolator i.e. switch and you can wire direct to fuse box thats something you must work out easies way.
As to paper work remember insulation is measured at 500 volt and continuity as 200ma min. So we are not talking about standard multi-meter but special meters for testing and inspection. I borrow my sons at Â£700 plus can't afford my own.
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