Level 2 - 8202 Ring and Radial circuits Quiz

According to BS 7671 Regulation 553.1.201, what type of socket-outlet should be used for household and similar use?

• Any type as long as it functions correctly

• The shuttered type complying with BS 1363

• The unshuttered type complying with BS 1363

• A type with an integrated transformer

What is the most commonly encountered plug top current rating in Great Britain?

• 20A

• 13A

• 32A

• 5A

What is the maximum floor area served by a radial circuit with a 20A overcurrent protective device according to Table H2.1?

• 100 m²

• 75 m²

• 50 m²

• 25 m²

For an outdoor socket-outlet with a current rating not exceeding 32A, what additional protection is required?

• A cartridge fuse to BS 1362

• An RCD with a rating (IΔn) not exceeding 30mA and an operating time not exceeding 40ms

• No additional protection is necessary

• A circuit breaker with a rating not exceeding 20A

What is the maximum floor area for a radial circuit using a 4mm² PVC cable?

• 50m²

• 75m²

• 100m²

• 25m²

What size cable is used for a radial circuit with a maximum floor area of 50m²?

• 4mm² PVC cable

• 2.5mm² PVC cable

• 1.5mm² mims cable

• 2.5mm² mims cable

What is the protective device rating for a socket outlet radial circuit that can cover a maximum floor area of 75m²?

• 20A

• 30A or 32A

• 45A

• 15A

For a ring final circuit with a maximum floor area of 100m², what is the size of the PVC cable used?

• 1.5mm² PVC cable

• 2.5mm² PVC cable

• 4mm² PVC cable

• 1.5mm² mims cable

What is the rating of the protective device for a ring final circuit that covers a maximum floor area of 100m²?

• 20A

• 30A or 32A

• 45A

• 15A

Why does the standard ring final circuit use smaller conductors than the equivalent radial final circuit?

• To save on material costs

• Because the current going to each socket-outlet comes from two directions, thus spreading the load

• To make the installation process faster

• To reduce the risk of electric shocks