26.
23. State the meaning basic protection. Use sketch show how ‘discrimination’ can applied piece of
equipment connected final circuit.3.
25.
28.257
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
20.
27.
. State the need for RCDs electrical installation. State the meaning fault protection.3. supplying socket outlets with rated current not exceeding 20A
and
b. Use bullet points and simple sketch briefly describe the operation
of RCD. Briefly describe application for RCBOs. List typical ‘exposed parts’ installation.
a.
22.
21. Use sketch show the path taken earth fault current. for use mobile equipment out doors required IEE
Regulation 411. List typical ‘extraneous parts’ building.
24
