Where can you find a book for residential wiring using 240V?

This kind of question scares me. Electricians are professionals and went to school to learn how to do this without a book in our hands. Please for the sake of your Family and neighbors hire a pro. The sales people at Home Depot are probably not Electricians!

Answer

Each country has its own electrical wiring regulations. For example, the UK, which operates a 230-V residential system, these regulations are specified in BS 7671:2008 'Requirements for Electrical Installations' (also known as the IEE Wiring Regulations, 17th Edition). This book is available from any book supplier, including Amazon.