5.
13. List the four factors which the selection protective device
depends. current which exceeds the rated current otherwise healthy
circuit one definition of:
a.0s
d.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. fuse
d. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a.
17. State the meaning ‘discrimination’ applied circuit protective
devices. overcurrent
c. very low resistance
c. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a. Briefly explain why electrical installation needs protective devices. fuses MCBs the live conductor
d.
19. List the five essential requirements for device designed protect
against overcurrent. unlimited. short-circuit current.
. 0. fault protection
b. 230V supply
b. consumer unit.2s
b. circuit protective conductor
c. 0.
14. According IEE Regulation 411.4s
c.3. fault protection
b. very high resistance. Briefly describe the action fuse under fault conditions.
12.
18.
15.2. overload current
d.
16.11
