Mains electricity and safety

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Question 2
Easy

An engineer is inspecting the design of a standard three-pin mains plug used for household appliances.

A detailed diagram of a standard UK three-pin plug with the top cover removed, showing the internal wiring. The green and yellow striped earth wire is connected to the top terminal. The blue neutral wire is connected to the left terminal. The brown live wire is connected via a cartridge fuse to the right terminal. A cable grip at the bottom secures the outer plastic sheath of the main cable. The outer casing of the plug is made of non-conducting plastic.

The mains plug and cable assembly contain several safety features.

One of these safety features has been ticked in the table below.

Put two more ticks (✓) in the table to show the other two safety features.

Part of the plug assemblySafety feature
Brass pins
Earth wire
Fuse
Live wire
Plastic casing✓
[2]

Mains electricity and safety Questions

  1. GCSE
  2. /Physics
  3. /Mains electricity and safety