3.
28.3.
26. Use sketch show the path taken earth fault current. Use bullet points and simple sketch briefly describe the operation
of RCD. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.
27.
.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20.
a.
21. List typical ‘extraneous parts’ building. Briefly describe application for RCBOs. for use mobile equipment out doors required IEE
Regulation 411. State the need for RCDs electrical installation.
24. supplying socket outlets with rated current not exceeding 20A
and
b.
23. State the meaning basic protection.
22.
25. State the meaning fault protection. List typical ‘exposed parts’ installation
