2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a.0s
d.
13. very low resistance
c.
.2s
b.
12. short-circuit current. overload current
d.
16.2. 230V supply
b. State the meaning ‘discrimination’ applied circuit protective
devices. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a. fuses MCBs the live conductor
d. unlimited.
18. According IEE Regulation 411. List the four factors which the selection protective device
depends. fault protection
b. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a. fault protection
b. consumer unit. List the five essential requirements for device designed protect
against overcurrent. 0. Briefly explain why electrical installation needs protective devices. fuse
d. very high resistance. overcurrent
c. 5.3.
14.4s
c.
15. circuit protective conductor
c.
19. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. 0.
17. Briefly describe the action fuse under fault conditions.11
