Page 60 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 2 : Connect and test the MCB
1 Identify the different types of MCB’s, check the construction and ratings.

2 Make the connection of MCB in simple electrical circuit.
3 Connect the 1 pole MCB of small current (1 Amp) in the circuit.
4 Simulate the over current fault in the circuit and observe the tripping of MCB.
5 Connect and test the MCB in 1 phase & 3 phase circuits.

TASK 3: Connect and test the ELCB
1 Check the terminals, ratings of ELCB.
2 Connect the ELCB in electrical circuit and switch ON the supply.
3 Press the ‘’Test’’ button of ELCB and check the tripping of ELCB.
4 Simulate the earth fault in the circuit with test lamp and check the tripping of ELCB.
5 Connect and test ELCB in domestic wiring circuit.

Safety precautions
• Handle the cartridge fuse carefully and do not drop.
• Connect the fuse always in phase line.
• Do not make short circuit in high voltage circuit to test MCB.
• Earth fault should be simulated by test lamp to test ELCB.

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CITS : Power - Electrician & Wireman - Exercise 22