Chapter 41 - 18th Edition Exam Help Quiz

Which of the following is not listed in the regulations as a protective measure that is generally permitted?

• Automatic disconnection of supply

• Earthing bonding

• Insulating life parts

• Touch voltage above 50 volts

Question 2 is about tt systems distribution circuits and disconnection times. Where can you find the relevant information?

• Page 55

• Page 61

• Page 63

• Page 79

A regular question about luminaires in houses. Where can you find the answer?

• Page 57

• Page 63

• Page 61

• Page 59

Question four is a question on fuses. Where are you going to find tables on maximum zs values for fuses?

• Page 68

• Page 64

• Page 63

• Page 61

Look at the clues in the question. Where can you find an entry for tt system?

• Page 79

• Page 55

• Page 63

• Page 61

A question on reduced low voltage systems. Where can you find the relevant information?

• Page 64

• Page 63

• Page 61

• Page 68

When making provisions for basic protection, where can you find the answer?

• Page 55

• Page 57

• Page 61

• Page 63

Can you find placing out of reach?

• Page 55

• Page 57

• Page 61

• Page 74

What is the maximum permitted zs for a 32 amp bs 88-3 fuse with a required disconnection time of 0.4 seconds?

• 1.50 ohms

• 0.91 ohms

• 1.20 ohms

• 0.33 ohms

What is the maximum designation time for a 32 amp cooker circuit installed in a domestic dwelling with a tn cs earthing system?

• 0.2 seconds

• 0.8 seconds

• 0.4 seconds

• 0.6 seconds