9189 Electrical Powerpoint 4

What is another name for a radial circuit?

• Loop circuit

• Power circuit

• Ring circuit

• Parallel circuit

Which type of appliances are typically fed by a radial circuit?

• Lighting systems

• Small kitchen appliances

• Showers, cookers, or central heating systems

• Computers and office equipment

What is the maximum floor area that an A3 radial circuit can cover?

• 25m²

• 50m²

• 100m²

• 150m²

What type of cable is used in a radial circuit?

• 1.0mm² PVC cable

• 2.5mm² PVC cable

• 4.0mm² PVC cable

• 6.0mm² PVC cable

What is the rating of the MCB that supplies the radial circuit in the consumer unit?

• 10A

• 16A

• 20A

• 32A

What is the maximum floor area served by an A2 Radial circuit?

• 50m²

• 75m²

• 100m²

• 125m²

What is the overcurrent protective device rating (A) for an A2 Radial circuit?

• 20

• 25

• 30 or 32

• 40

What is the minimum live conductor cross-sectional area (CSA) in mm² for a copper conductor thermoplastic or thermosetting insulated cable in an A2 Radial circuit?

• 1.5

• 2.5

• 4

• 6

What type of circuit is an A2 circuit?

• Ring

• Radial

• Loop

• Parallel

What is a ring main typically used for within a property?

• To supply the socket outlets

• To supply the lighting circuits

• To supply the heating system

• To supply the water system