List the five essential requirements for device designed protect
against overcurrent. unlimited. fuse
d.
14.11. very low resistance
c. List the four factors which the selection protective device
depends.
18.
.3. consumer unit. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a.
12. short-circuit current. According IEE Regulation 411.
17. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a.
13. fault protection
b. very high resistance. fuses MCBs the live conductor
d.
16. 0.0s
d. overcurrent
c.2s
b.4s
c.2. Briefly explain why electrical installation needs protective devices. 0. Briefly describe the action fuse under fault conditions. fault protection
b. State the meaning ‘discrimination’ applied circuit protective
devices. 230V supply
b.
15.
19. circuit protective conductor
c. overload current
d. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. 5
