An electrician measures the potential difference (p.d.) between two different wires, X and Y, in a standard mains plug.
The plug is wired correctly and working safely.
The fuse in the plug is connected in series with wire X, and the potential difference between wire X and wire Y is 230 V.
Which of the following shows the correct names for wire X and wire Y?
Wire X is live, wire Y is neutral
Wire X is neutral, wire Y is earth
Wire X is earth, wire Y is live
Wire X is neutral, wire Y is live