Cables and Plugs

Name the colour of each of the three wires in a mains plug.

• Red

• Blue

• Green

• Brown

• Yellow and Green

Explain why each of the wires in a three-core mains cable is insulated.

• To keep them warm

• To keep them cool

• To prevent electrical connection between them inside the cable

What is the name given to the blue wire?

• Neutral Wire

• Earth Wire

• Live Wire

What is the name given to the brown wire?

• Neutral Wire

• Earth Wire

• Live Wire

What colour is the live wire in a mains plug?

• Green
• Blue
• Brown

The fuse in a circuit melts when:

• An appliance isn't earthed
• Too much current flows
• Too much voltage flows

A double insulated appliance does not need:

• A fuse
• A earth wire
• A neutral wire

Tags

NGSS.HS-PS2-5

What's the first thing you should do if someone is shocked electrically?

• Use the fire extinguisher
• Check for breathing and heartbeat
• Turn off the power source
• Remove the person from the power source

The neutral wire carries the current...

• towards the appliance

• out of the appliance

The fuse used in an electric appliance should be rated __________ than the operating current.

• higher

• lower