Double insulation eliminates need for earth connection

Steps:

• Double insulation means the device has two layers of insulation, making it safe without grounding.
• Such devices use a two-core cable (live and neutral) instead of three-core with earth.
• A three-pin plug is used, but the earth pin remains unconnected to the cable's earth wire.
• The fuse protects the live wire, while live and neutral pins connect to the cable.

Why A is correct:

• Double insulation (per electrical safety standards) removes the need for an earth wire, so the earth pin is not connected.

Why the others are wrong:

• B: Fuse is wired into the live conductor for overcurrent protection.
• C: Live pin connects to the cable's live wire to supply power.
• D: Neutral pin connects to the cable's neutral wire to return current.

Final answer: A