Two electrical appliances are linked to the mains supply. The cable for one appliance has an earth wire included. The cable for the other appliance does not require an earth wire.
- AOne appliance has a metal case, but the other appliance does not.
- BOne appliance is fitted with a fuse, but the other appliance is not.
- COne appliance is fitted with a switch, but the other appliance is not.
- DOne appliance needs more current than the other appliance.