Briefly describe the action fuse under fault conditions.
18.
19.4s
c. very low resistance
c. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. overload current
d.2s
b. fault protection
b. According IEE Regulation 411. overcurrent
c. 5. unlimited.11. 0. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a. circuit protective conductor
c. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a. List the four factors which the selection protective device
depends.
14.
17. very high resistance.
15. short-circuit current.
. fuses MCBs the live conductor
d.
16. consumer unit. fault protection
b. 230V supply
b. 0. Briefly explain why electrical installation needs protective devices.3.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. List the five essential requirements for device designed protect
against overcurrent.0s
d. fuse
d. State the meaning ‘discrimination’ applied circuit protective
devices.
12.
13.2
