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Thread: K = Constant

  1. #1
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    K = Constant

    K is the placeholder for the constant of resistivity in the Voltage Drop formula 2xKxIxL/Cm. Was K given as the designator so as to be named after Kirchoff? If not, why is K given as the placeholder.

  2. #2
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    Quote Originally Posted by Chris O'Hotto View Post
    K is the placeholder for the constant of resistivity in the Voltage Drop formula 2xKxIxL/Cm. Was K given as the designator so as to be named after Kirchoff? If not, why is K given as the placeholder.
    "K=ohms * circular mil per foot of conductor", which I believe equals 12.9 for copper.It is just the average DC resistance for all wire sizes.
    No provisions for PF or the AC characteristics of the conductor.

  3. #3
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    Quote Originally Posted by Chris O'Hotto View Post
    K is the placeholder for the constant of resistivity in the Voltage Drop formula 2xKxIxL/Cm. Was K given as the designator so as to be named after Kirchoff? If not, why is K given as the placeholder.
    The letter K (or k) is often used in formulas to represent a constant. The German noun for "constant" is "Konstante" and that may have influenced the choice.

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