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  1. skyline1977

    What's the system total power factor?

    Hi, I am trying to solve a power factor question but I ended up with a different answer. The question is as shown below: My Answer is: However, the correct answer is C. That is the p.f. =0.857. My question is where is my mistake? Thanks.
  2. skyline1977

    Isolated system

    in the UK which electric socket is used with an isolation transformer? since the normal socket has a grounding. Are there Isolated Ground UK type electric socket
  3. skyline1977

    when is 4 pole ATS required

    Hi, Per NEMA or IEC when are 4 poles ATS required?

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