An electrical appliance has a metal outer casing and is not double-insulated. Which statement correctly describes its connection to the mains supply?
It must be connected using a three-core cable so that the metal casing is connected to the earth wire.
It can safely be connected using a two-core cable with no earth wire.
It does not need a fuse if the earth wire is connected to the metal case.
The metal casing should be connected to both the neutral wire and the earth wire.
135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.