Why need 3phase machine double earthing?
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What is DC series motor?
What is the function of NER and NET?
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what is the maximum current carrying capacity of a 95 sqmm cupper under ground cable laid partialy in land and partialy in ground?
why only dc is given as excitation...why not ac???
If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?
how many parameters can integrate with fire alarm basically ?
1)what is hypo test. 2) which cable need to hypo test.3) when hypo test can be done before or after glanding.4) what is the purpose of hypo test.
What is ELCB?
why the neutral point in connnection oscillates?
why buchholz relay is kept on inclined position and why it is cover??
lightning current is ac or dc..?????
what is phase voltage phase current line current and their usage? provide diagram