State the meaning ‘discrimination’ applied circuit protective
devices. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a.0s
d.2. consumer unit.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. very high resistance. List the four factors which the selection protective device
depends.
15. short-circuit current.
17.2s
b. List the five essential requirements for device designed protect
against overcurrent. fault protection
b. very low resistance
c.
14. 0.
. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a. overcurrent
c. fuse
d. overload current
d. Briefly describe the action fuse under fault conditions. 0.
13.4s
c.
18.
12. 230V supply
b.3.
16. 5. unlimited. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. According IEE Regulation 411. circuit protective conductor
c. fuses MCBs the live conductor
d. Briefly explain why electrical installation needs protective devices.
19.11. fault protection
b
