5. fault protection
b. fuse
d.
12. unlimited. circuit protective conductor
c.
17.0s
d. List the five essential requirements for device designed protect
against overcurrent. fuses MCBs the live conductor
d.4s
c. fault protection
b. short-circuit current. 230V supply
b. consumer unit.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. current which exceeds the rated current otherwise healthy
circuit one definition of:
a.
16. overcurrent
c.2. Briefly explain why electrical installation needs protective devices. 0. very high resistance. 0.3. State the meaning ‘discrimination’ applied circuit protective
devices. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a.11. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a.
19. very low resistance
c.
13.2s
b. overload current
d. List the four factors which the selection protective device
depends. According IEE Regulation 411.
14. Briefly describe the action fuse under fault conditions.
.
18.
15
