18th Edition Exam Help: Part 5 of the Wiring Regulations

Which chapter of part 5 should you look in to find information about selecting types of wiring systems?

• Chapter 55

• Chapter 54

• Chapter 53

• Chapter 52

What is the d-rating factor for a cable surrounded by 100 millimeters of thermal insulation?

• 0.78

• 0.85

• 0.80

• 0.75

What is the minimum cross-sectional area of a buried earthing conductor made from copper that is not protected against corrosion?

• 35mm

• 30mm

• 25mm

• 20mm

Where can the adiabatic equation be found in the wiring regulations?

• Page 144

• Page 195

• Page 196

• Page 198

What is the purpose of a type 1 SPD according to the memory jogger provided?

• To protect against short circuit

• To protect against overload

• To protect against lightning

• To protect against surges

What is the tabulated size of a protective conductor according to the information provided?

• At least big enough

• Less accurate

• At most big enough

• Calculated

Where can information about high protective conductor currents be found in the wiring regulations?

• Page 195

• Page 144

• Page 198

• Page 201

What is the purpose of an RCD according to the wiring regulations?

• To protect against overload

• To protect against overvoltage

• To protect against earth fault

• To protect against short circuit