Use bullet points and simple sketch briefly describe the operation
of RCD.
23. Briefly describe application for RCBOs. State the meaning fault protection. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.
27. State the meaning basic protection. for use mobile equipment out doors required IEE
Regulation 411. Use sketch show the path taken earth fault current. supplying socket outlets with rated current not exceeding 20A
and
b.
26.
24. List typical ‘extraneous parts’ building.
28. State the need for RCDs electrical installation.
.3.
22.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20.
25.
a.
21.3. List typical ‘exposed parts’ installation
