Mains Electricity

Identify the earth wire in this diagram.

Answer explanation

Identify the live wire in this diagram.

Answer explanation

Identify the neutral wire in this diagram.

Answer explanation

Identify the outer insulation in this diagram.

Answer explanation

Identify the cable grip in this diagram.

Answer explanation

Identify the fuse in this diagram.

Answer explanation

Which of the following plug wires has current passing through it (in a normally functioning device)?

• Earth

• Live

• Neutral

• Conductor

Answer explanation

The live wire provides the path along which the electrical energy from the power station travels.

The neutral wire completes the circuit.

The earth wire usually has no current in it. It is there to protect you if an appliance develops a fault. It provides a path for current to escape without passing through the user (you).

Plugs use ​ (a)   pins since they are an excellent ​ (b)   of electricity, and also use ​ (c)   casing since it is a good ​ (d)   .

• brass
• conductor
• plastic
• insulator
• steel
• copper
• wooden
• generator
• producer
• caser

Which electrical safety device is pictured here?

• Insulation

• Fuses

• Circuit Breakers

• Ring Main Circuit

Which electrical safety device is pictured here?

• Insulation

• Fuses

• Circuit Breakers

• Ring Main Circuit