State the meaning fault protection.
a. State the need for RCDs electrical installation.
27. List typical ‘extraneous parts’ building.3. supplying socket outlets with rated current not exceeding 20A
and
b.
25.
21. Use bullet points and simple sketch briefly describe the operation
of RCD. Use sketch show the path taken earth fault current.
22. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit. State the meaning basic protection. List typical ‘exposed parts’ installation.
28.
.3.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20. Briefly describe application for RCBOs. for use mobile equipment out doors required IEE
Regulation 411.
24.
26.
23
