Fuse rating matches appliance current draw

Steps:

• Calculate current using I = P / V, where P is power and V is voltage from label (e.g., 1000W at 230V gives ~4.35A).
• Select the lowest standard fuse rating that exceeds the calculated current to protect wiring without nuisance tripping.
• Standard UK fuse ratings include 3A, 5A, 13A; avoid exact match to allow for startup surges.
• Choose 5A as it safely covers ~4.35A without being oversized.

Why C is correct:

• 5.0A is the next standard rating above 4.35A, per electrical safety standards (BS 1362), ensuring protection while allowing normal operation.

Why the others are wrong:

• A and B (4.0A/4A): Too low; would blow under normal load or surges, risking inconvenience or fire from repeated faults.
• D (13A): Too high; offers inadequate protection for thin appliance wiring, violating fuse sizing rules.

Final answer: C