State the meaning ‘discrimination’ applied circuit protective
devices. fuse
d.
12. List the four factors which the selection protective device
depends.2s
b. circuit protective conductor
c. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a. List the five essential requirements for device designed protect
against overcurrent. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a. 230V supply
b.4s
c. 0. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. Briefly describe the action fuse under fault conditions.
.
17. fault protection
b.
18. fuses MCBs the live conductor
d.
15.
13. According IEE Regulation 411. 0. unlimited.11.
19. consumer unit. very low resistance
c. Briefly explain why electrical installation needs protective devices. short-circuit current. 5. fault protection
b. overcurrent
c.
14.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. overload current
d.3.0s
d.
16.2. very high resistance
