Use sketch show the path taken earth fault current.3. Briefly describe application for RCBOs.
25. List typical ‘exposed parts’ installation. List typical ‘extraneous parts’ building. for use mobile equipment out doors required IEE
Regulation 411. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.
a.3. State the meaning basic protection.
26.
28. State the need for RCDs electrical installation.
23. State the meaning fault protection.
24.
22.
27. Use bullet points and simple sketch briefly describe the operation
of RCD.
. supplying socket outlets with rated current not exceeding 20A
and
b.
21.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20
