List typical ‘extraneous parts’ building. State the meaning basic protection. Use sketch show the path taken earth fault current.
21.
22. State the meaning fault protection. Use bullet points and simple sketch briefly describe the operation
of RCD. State the need for RCDs electrical installation. supplying socket outlets with rated current not exceeding 20A
and
b.
25.
27.
23.
28. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.3. for use mobile equipment out doors required IEE
Regulation 411.
a.
.3. List typical ‘exposed parts’ installation. Briefly describe application for RCBOs.
26.
24.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20
