2s
b.
15.
12.
19. 0. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a. According IEE Regulation 411. very low resistance
c. fuse
d. overload current
d. very high resistance.11.0s
d. unlimited. fuses MCBs the live conductor
d. overcurrent
c.
14.
13. circuit protective conductor
c.2.
18.
17. 5. 230V supply
b.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. List the four factors which the selection protective device
depends. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a.3.
.
16.4s
c. fault protection
b. Briefly explain why electrical installation needs protective devices. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. consumer unit. Briefly describe the action fuse under fault conditions. State the meaning ‘discrimination’ applied circuit protective
devices. 0. short-circuit current. List the five essential requirements for device designed protect
against overcurrent. fault protection
b
