Mains electricity and safety

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Question 9
Easy

The diagram shows the internal wiring of a standard UK mains plug.

A diagram of a UK three-pin plug with the cover removed. The three wires are visible: a green-and-yellow striped wire connected to the top terminal and labelled Y, a blue wire connected to the bottom-left terminal, and a brown wire connected to the bottom-right terminal next to a fuse.

Describe the purpose of the wire labelled Y.

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Mains electricity and safety Questions

  1. GCSE
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