Functional and Protective Earthing

What is the primary purpose of protective earthing?

• To improve the functionality of electrical equipment

• To carry fault current away and reduce shock risk

• To increase the electrical conductivity of the soil

• To enhance the aesthetic appeal of electrical installations

What does an RCBO use if there is a break in the neutral?

• An alternative current source

• A wireless signal

• The functional earth

• A backup battery

What is the color of a separate functional earth conductor according to BS7671?

• Blue

• Cream

• Red

• Green and yellow

What is the main difference between protective earthing and functional earthing?

• There is no difference

• Protective earthing is for safety, functional earthing is for equipment functionality

• Functional earthing is for aesthetic purposes

• Protective earthing is used only outdoors

What problem can arise with IT equipment due to electrical interference?

• Increased energy consumption

• Physical damage

• Data loss

• Overheating

Why is a normal protective earth not a good functional earth?

• It is not durable

• It cannot carry current

• It is too expensive

• It has high impedance at high frequencies

What happens when protective earthing and functional earthing are combined?

• It results in a decrease in safety

• The need for earthing is eliminated

• The electrical system becomes less efficient

• The overall CSA of the protective earth increases

According to BS7671, how should protective and functional earthing conductors be connected within a single building?

• Connected to separate terminals

• Connected to the main earthing terminal

• They should not be connected

• Connected directly to the electrical equipment

What is the primary function of an RCBO?

• To enhance the functionality of the electrical system

• To operate when there is an imbalance between line and neutral

• To protect against overvoltage

• To provide backup power

Why might filters be used in the connection of computers to the electrical system?

• To protect against transients and prevent data loss

• To improve internet connectivity

• To reduce energy consumption

• To make the system wireless