Unit 105 MC (Q2)

A multi-outlet radial circuit wired with 2.5mm² conductors is supplied via a 30A fuse.

• True

• False

Answer explanation

It is a 20A fuse

A 32A radial circuit wired in 4mm² flat twin + CPC cable. The maximum number of outlets is unlimited.

• True

• False

Answer explanation

As many as you wish. This type of circuit is rare compared to ring final circuits, which cover a larger area and use smaller cables, which are easier to terminate.

7.2.2 Socket-outlet circuits in the On-Site Guide gives guidance.

An outlet can be single or twin.

• True

• False

Answer explanation

Yes you can have single or multiple outlets

The maximum size fuse in a 13A plug is 12A.

• True

• False

Answer explanation

There is not a 12A fuse. The maximum rating is 13A

A fused spur outlet is not allowed on a radial circuit.

• True

• False

Answer explanation

It is counted as normal outlet

Radial circuit cables do not need to be clipped in a roof space.

• True

• False

Answer explanation

They must be supported away from damage and insulation etc

Joints in cables can be made in joint boxes.

• True

• False

Answer explanation

Joint boxes should be accessible

Bare copper CPCs should be covered in green sleeving

• True

• False

Answer explanation

They should be Green and yellow

13A sockets can be installed within 1 metre of a bath or shower.

• True

• False

Answer explanation

Not allowed

A 2kW hot plate can be supplied via a 13A socket.

• True

• False

Answer explanation

A 2kW hot plate can be supplied via a 13A socket.

Current=Power/Voltage

I=2000/230

=8.7 Amps ∴ a 13 amp socket would be allowable.