Voltage Drop Confirmation

Discussion in 'The Projects Forum' started by dineshhx, Jan 10, 2015.

  1. dineshhx

    Thread Starter New Member

    Jan 10, 2015
    1
    0
    Asking you guys because i would like to confirm the voltage drop for following datas.

    copper wire with length of 120ft

    input load : 20A

    When i check voltage drop from Easycalculation.com

    The calculator shows result as "1.2 volts". Is the answer value is correct for my automatic POWERON circuit?

    Kindly help me to use the exact voltage drop for my digital circuit.
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,004
    3,232
    It entirely depends upon the wire gauge, which you did not state.
    What does an automatic POWERON circuit have to do with it? :confused:
     
  3. #12

    Expert

    Nov 30, 2010
    16,281
    6,792
    My chart shows that 12 AWG wire has 1.588 ohms per thousand feet at 20 degrees C.
    That and Ohm's Law will get you an answer.
     
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,387
    1,605
    If the power source and the load are 120 feet apart you have 240 feet minimum of wire between them.
     
  5. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    Ohming in on homes law.
     
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