(b) Name the part of the appliance which is earthed.
Solution:
(a) If the fuse is in the neutral wire, the fuse will burn due to the high current flow, but the appliance will remain at supply voltage, allowing current to flow through the appliance to the person contacting it. As a result, the fuse must be connected exclusively to the live wire.
(b) The metallic case is the part of the device that is earthed.