During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

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america 60hz electric supply is used; but india it is 50hz; why? and if we use 60 hz supply what changeg has to be done or all the equipment has to be thrown which has rating of 50hz frequincy

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which INDIAN STANDERD in Mention the earth test value?

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describe the constructional features of an auto transformer and its principle operation

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What do you mean by PT-100?

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What should be value of Circuit breaker operating time and tripping time?

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what is the size(sq.mm) of these conductors dog,rabbit,tiger,panther,mush,

8 Answers   Power Grid,

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Why two main buses and one transfer bus scheme not using for 400kV switchyard

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what is the difference between 4pole & 6pole DC Motors & give advantage ?

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What are the types of feedback oscillators?

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What are the advantages of individual drives?

1 Answers   A1 Electricals, Suzlon,

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Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.

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