Submitted Questions

  • Phase Identification

    In a three phase system three wires are of colour red, yellow and blue are used to discriminate each phase. Now how will you identify each phase wire without knowing the colour and without any pre information?

    Soumya Ranjan Nayak

    • Dec 28th, 2017

    Go for continuity test from source end & at testing end test in discharge condition.


    • Nov 22nd, 2017

    The neutral is often at the very top of a pole or it could be below the three hot phases. If all the wires are side by side, it sometimes uses a smaller insulator because theres very little voltage on...

  • Voltmeter Measurement

    If we connect a voltmeter between earth and ground wire, how much it will measure?


    • Nov 9th, 2011

    there is no difference bet earth wire and ground wire, both are same thing. BUT, if U mean earth as soil (i will refer soil as earth), and U disconnected ground wire from soil and put a voltmeter in ...


    • May 16th, 2009

    Since the earth and ground wires are at same potential there will be no potential displayed in the voltmeter,But on the contrary volts?may be displayed between the?NEUTRAL and the ground/earth wire.