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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
A lot of people put a lot of effort into professional publications. The NICEIC in the UK and the UK Wiring Regulations are excellent sources of guidance, but you have to pay. I don't think that's too small a price to ask if it helps your career.
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I love deadlines; I love the whooshing sound they make as they pass by. - Douglas Adams
The way you asked for information seems you are new to electrical technology , most of the members have given you the channels and will cooperate further , but it is practical experiance you to posses , i recommend to assist some experienced professional along with theoratical knowledge you aquire , electrical wiring principals are easy to learn initially , but you have to be extremely cautious while working with eletricity as this invisible force has tendency to kill unless well respected , visit wikipedia , google , www.howstuffworks.com ........ thank you