Electrical Safety

A switch in an electrical circuit should always be ….?

• Connected to the live wire.

• Connected to the earth wire.

• Connected to the neutral wire.

Materials that do not conduct electricity are called...?

• Conductors

• Modifiers

• Insulators

The plastic outside of electrical wires protects people by …?

• Insulating them from the heat of the wire.

• Insulating them from the electric current in the metal core of the wire.

• Insulating them from static electricity.

The purpose of a fuse is to...?

• To break when there is too little current.

• Keep the circuit intact even if there is a problem with the electrical equipment.

• Protect the wiring and equipment from overloading & potentially catching fire.

The thicker the wire in a fuse...?

• The more current needed to melt it and break the circuit.

• The less current needed to melt it and break the circuit.

• The longer it will last.

The purpose of the earth wire is to ...?

• Make the metal casings of equipment become live if something goes wrong.

• Prevent the metal casings of equipment become live if something goes wrong.

• Conduct lightening down to the ground.

A circuit breaker is more effective that a fuse because ...?

• It is cheaper than a fuse.

• It cuts off the current much more quickly and is easier and safer to reset.

• It doesn't get as hot.

ELCB stands for...?

• Electrostatic Circuit Breakers

• Earth Load Circle Breaker

• Earth Leakage Circuit Breaker

Residual Current Devices (RCDs) are often used with outdoor electrical equipment such as strimmers to ...?

• Protect people from electric shock.

• Protect the equipment from damage.

• Protect the garden.

A typical example of double insulated equipment in the home includes ...?

• An electric cooker.

• A hair dryer.

• A microwave oven.