pattress box earth

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    My electrician has confused me about how to wire a light switch - please can someone have a go at explaining what he's saying?

    Thank you for this! So, nearly all the light switches (all white plastic, no metal) that I've connected myself have all been one-gang switches with one length of t&e 1.5 cable going to them via a plastic dry lining pattress box from the light fitting. Line/brown wire to COM, blue switched live...
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