Electrical Circuits in a Dwelling

What is the purpose of the Earth bar in a consumer unit?

• To connect live wires

• To provide a path to ground

• To distribute neutral wires

• To house circuit breakers

Which part of the consumer unit is used to connect incoming neutral wires?

• Earth bar

• Neutral in

• Circuits out

• Busbar

What does an RCD detect to protect a circuit?

• Voltage increase

• Current imbalance

• Temperature rise

• Power surge

What is the label on the switch in the diagram?

• OFF

• RESET

• ON

• TRIP

What is the purpose of the red line in the diagram?

• To indicate a fault

• To show the circuit path

• To highlight the busbar

• To mark the live wire

What is the color of the neutral wire in the diagram?

• Brown

• Blue

• Black

• Red

What is a cartridge fuse to BS 1361 used for?

• It is used in a consumer unit like a rewireable fuse.

• It is used in automotive applications.

• It is used for high-voltage power lines.

• It is used in electronic devices.

Which cables are often used on a pump?

• Flex cables

• Multicore flex

• Individual 'singles' cables

• Cables from the consumer unit

What type of cable is used for wiring heating controls?

• Flex cables

• Multicore flex

• Individual 'singles' cables

• Cables from the consumer unit

What type of cable is used for wiring a boiler?

• Flex cables

• Multicore flex

• Individual 'singles' cables

• Cables from the consumer unit