theory book

  1. V

    SL, N and L any good UK Electrical theory book?

    Hi, this is my first post and I admit, I have not read the rules yet, so please go easy on me. I am not a qualified electrician but come from a science background so I know the basics quite well. Recently, I replaced an old PIR Bulk Head with a new PIR Bulk Head. While replacing the light, I...
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