(a)[3]
Explain how the earth wire and the fuse combine to make the washing machine safer.
(b(i))[1]
State the wire in which the fuse is fitted.
(b(ii))[1]
Explain why the fuse is fitted into this wire.
(c(i))[1]
State the names of each of these wires.
(c(ii))[1]
Suggest why the hair-dryer does not need an earth wire.