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Thread: Test Questions

  1. #31
    Join Date
    Oct 2014
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    Utah
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    Quote Originally Posted by Smart $ View Post
    Yeh. You did as a second step. Learn to do it all in one step.

    In the equation I wrote, take all knowns to one side of the equal sign; change preceding operator sign when you do: multiplication to division, division to multiplication.
    Cmil ÷ 2 ÷ K ÷ I × Vd = L
    6530÷2 ÷12.9÷16×3.6 =56 feet!

    Thank you guys for all the help it really means a lot to me that you take the time to help a guy understand this stuff!

  2. #32
    Join Date
    Oct 2009
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    Quote Originally Posted by Smart $ View Post
    Yeh. You did as a second step. Learn to do it all in one step.
    Or do it from first principles. Vd = IR and %Vd = (Vd/V)(100%)

  3. #33
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    Oct 2014
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    Quote Originally Posted by ggunn View Post
    Or do it from first principles. Vd = IR and %Vd = (Vd/V)(100%)
    Thanks, I do have a question? Why times by 100?

  4. #34
    Join Date
    Jun 2006
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    Ohio
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    Quote Originally Posted by sclement View Post
    Thanks, I do have a question? Why times by 100?
    Vd/V is a ratio which the numeric value is typically between zero and one. For a 3% voltage drop, the ratio is 3:100... or e.g. 6.24/208. The numeric value is 0.03. To convert to percentage, one multiplies by 100 and appends the percentage symbol.
    I will have achieved my life's goal if I die with a smile on my face.

  5. #35
    Join Date
    Mar 2017
    Location
    US
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    10

    Thanks

    Glad you were able to explain it better than me. Never seen it done that way. I know it's the same just a different format. I learned something. Thanks

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