INDUSTRIAL WIRING PRACTICE - Practice Mode

1) What is the colour code of protective earthing conductor as per NE code?

Blue Black Green Red

Correct Answer: Green

2) What is the recommended resistance value of earth continuity conductor used in domestic wiring installation as per IE Rules?

Not more than 8 ohm Not more than 3 ohm Not more than 2 ohm Not more than 1 ohm

Correct Answer: Not more than 1 ohm

3) How many earth is to be provided for a AC 3 phase induction motor?

1 2 3 4

Correct Answer: 2

4) How to reduce the earth resistance value keep as low?

By connecting two earth in series By adding more charcole By connecting to earth in parallel By adding more salt

Correct Answer: By connecting to earth in parallel

5) What is the minimum clearance required between the wall and backside of a panel board in industrial wiring?

Not less than 22.88 cm Not less than 18.4 cm Not less than 15.8 cm Not less than 10.2 cm

Correct Answer: Not less than 18.4 cm

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