05: 53 Protection, Isolation, Switching, Control and Monitoring (152)

Question 1

A BS EN 60898 circuit breaker can be used for (Table 537.4 p.181)

a) Isolation
b) Emergency switching
c) Functional switching
d) All of the above

Answer 1

d) All of the above

Question 2

Devices for protection against the risk of fire include (532.2 p.157)

a) RCDs not exceeding 500 mA
b) RCDs not exceeding 300 mA
c) Time delay RCDs
d) Type B circuit breakers

Answer 2

b) RCDs not exceeding 300 mA

532.2 p.157
Residual current devices (RCDs) for protection against the risk of fire

RCDs shall comply with Regulations 531.3.1 to 531.3.4 and with the applicable requirements of Regulation 531.3.5.

RCDs with a rated residual operating current not exceeding 300 mA shall be used. RCDs shall be installed at the origin of the circuit to be protected.