Uploaded June 2020 | Updated September 2026, 2 weeks ago

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Do metal backboxes need an earth connection, and how can that be achieved - by the fixing screw into a fixed lug, separate wire or making one of the circuit protective conductors longer.
Information as shown in the video can be found in Guidance Note 1, and also Guidance Note 8 (not shown in the video, but similar to GN1).

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