. 0.4s
c. 0.0s
d. unlimited. circuit protective conductor
c. consumer unit.
12.
14. Briefly describe the action fuse under fault conditions. short-circuit current. List the five essential requirements for device designed protect
against overcurrent.
17. fuse
d. ensure the effective operation the overcurrent protective devices,
the earth fault loop path must have:
a.2s
b. 5. State the meaning ‘discrimination’ applied circuit protective
devices. fuses MCBs the live conductor
d.11.
19.3.
15.
18. 230V supply
b. overload current
d. current which exceeds the rated current otherwise healthy
circuit one definition of:
a. overcurrent
c.2. fault protection
b.2 all final circuits not exceeding
32A building supplied with 230V supply shall have a
maximum disconnection time not exceeding:
a. Briefly explain why electrical installation needs protective devices. According IEE Regulation 411. very low resistance
c. fault protection
b. The weakest link the circuit designed melt when overcurrent
flows one definition of:
a.
13. very high resistance. List the four factors which the selection protective device
depends.
16
