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The one screw that earths the consumer unitWhat earths a metal consumer unit?

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A small thing with a large consequence.

The whole metal enclosure is earthed by one screw

The earth bar is held in, and bonded to the enclosure, by a single screw. Remove it and the metal consumer unit is no longer earthed.

✋It gets removed by accident constantly. People pull that screw out without realising what it does. The repair is drilling the side and fitting a fly lead from the enclosure to the earthing terminal — so it is worth knowing which screw it is before you touch it.

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