213 ppt10 System protection components

What is the correct order of electrical components from the incoming supply to appliances/circuits?

• Incoming supply, Meter, Suppliers fuse, Consumer unit, Appliances/circuits

• Incoming supply, Suppliers fuse, Meter, Consumer unit, Appliances/circuits

• Incoming supply, Consumer unit, Suppliers fuse, Meter, Appliances/circuits

• Incoming supply, Appliances/circuits, Suppliers fuse, Meter, Consumer unit

Which of the following materials is a good conductor of electricity?

• Rubber

• Copper

• Plastic

• Glass

What is the primary function of insulators in electrical components?

• To allow electricity to flow

• To conduct heat

• To protect from electric shocks

• To increase electrical resistance

What can happen if an incorrect, undersized cable is used for a circuit or an appliance?

• Cable can go brown

• Cable can become more flexible

• Cable can cool down

• Cable can become waterproof

What is one of the consequences of using an undersized cable?

• Cable can become more colorful

• Cable can go brittle and damage the insulation

• Cable can become longer

• Cable can become magnetic

What is a potential risk of using an undersized cable?

• A fire can start

• Cable can become invisible

• Cable can become lighter

• Cable can become odorless

What is generally the first item that gets damaged when an undersized cable is used?

• The metal core

• The insulation

• The plug

• The socket

What is heat resistant flex used for?

• Cooling systems

• Heat producing appliances

• Lighting fixtures

• Water pumps

What is the usual power rating for an immersion heater?

• 1.0-1.5kW

• 2.5-3.0kW

• 3.5-4.0kW

• 4.5-5.0kW

What size cable is used for an immersion heater rated at 2.5-3.0kW?

• 1.0mm butyl heat resistant flex

• 1.5mm butyl heat resistant flex

• 2.0mm butyl heat resistant flex

• 2.5mm butyl heat resistant flex