. State the meaning fault protection.
25.
28. State the need for RCDs electrical installation.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20.
26. List typical ‘extraneous parts’ building.
24. Use bullet points and simple sketch briefly describe the operation
of RCD.
21. for use mobile equipment out doors required IEE
Regulation 411. State the meaning basic protection.
23.3.
22. List typical ‘exposed parts’ installation. Use sketch show the path taken earth fault current.
27.3.
a. Briefly describe application for RCBOs. supplying socket outlets with rated current not exceeding 20A
and
b. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit
