3. supplying socket outlets with rated current not exceeding 20A
and
b.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20.
25. Briefly describe application for RCBOs. State the meaning fault protection. State the meaning basic protection.3.
21. List typical ‘extraneous parts’ building. Use sketch show the path taken earth fault current.
26. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.
28.
24.
27.
. List typical ‘exposed parts’ installation.
22.
23. Use bullet points and simple sketch briefly describe the operation
of RCD. for use mobile equipment out doors required IEE
Regulation 411.
a. State the need for RCDs electrical installation
