Where all & Why resistance grounding is required?

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what are eddy currents

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at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

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What are the difference between CT/PT operated Meter and RRAMR Meter for HT/LT application?

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What is the difference between earthing & neutral.

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What is the use of doing meggering for a cable

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If a high resistance fault occurs,then what are the changes will happen in the system?

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what is the advantage of NiCd battery over Lead acid battery?

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What is the function of NER and NET?

0 Answers   Asian Paints, GHH RAND,

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What is voltage 

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WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

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why the crow do not feel the current in overhead line when it sits on the wire??????

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