Electrical Safety

Select the correct statements about the live wire in a plug.

• It is brown

• It is blue

• It has green and yellow stripes

• It is at 0 V.

• It is at 230 V.

Select the correct statements about the earth wire in a plug.

• It is brown

• It is blue

• It has green and yellow stripes

• It is at 0 V.

• It is at 230 V.

Select the correct statements about the neutral wire in a plug.

• It is brown

• It is blue

• It has green and yellow stripes

• It is at 0 V.

• It is at 230 V.

The neutral wire carries the current...

• towards the appliance

• out of the appliance

The __________ wire only carries a current when there is a fault.

In a plug, the fuse is connected to the __________ wire.

When the current through a fuse gets too high, the wire inside the fuse will...

• create a spark

• melt

• sound an alarm

• do nothing

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

• higher

• lower

An electrician has a 3 A, a 5 A, and a 10 A fuse. He is replacing a broken fuse in an appliance.

The appliance has a power rating of 1000 W and it is plugged into the mains supply, at 230 V. Determine the fuse that should be used in the appliance.

Select the correct advantages of circuit breakers over fuses.

• Circuit breakers can be reset.

• Circuit breakers are cheaper.

• Circuit breakers stop the current faster.