Electrical Safety for Metal-Cased Appliances

Steps:

• Identify the casing material: stainless steel is conductive metal, requiring earthing to safely divert fault currents.
• Determine fuse placement: fuses protect against overloads and must be in the live wire to interrupt current flow effectively.
• Recall wiring standards: earthed metal appliances need a fuse in the live conductor for double protection against shocks and faults.
• Eliminate options: incorrect fuse locations or omitting earthing violate safety codes.

Why A is correct:

• Metal casings must be earthed per electrical safety laws (e.g., IEE regulations) to ground faults, preventing shocks; fuse in live wire breaks circuit during overloads.

Why the others are wrong:

• B: Omits earthing, risking shock from fault currents on metal casing.
• C: Fuse in neutral fails to isolate live faults; no earthing leaves casing hazardous.
• D: Identical to C, incorrect fuse and earthing omission.

Final answer: A