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  • Users: lalver1
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  1. lalver1

    NEC voltage drop definition over 3 wires (single phase 3 wire)

    Hi, It's not clear to me from the NEC's definition how voltage drop should be calculated in this case (see diagram). I can find the drop across the cables serving the 2 loads (branch circuits) using the usual 2*I*R formula for each circuit and dividing by 120 for the first load and by 240 for...
  2. lalver1

    Voltage Drop % Definition

    Hi, I have a question about how voltage drop %, per the National Electrical Code (NEC), should be calculated for the attached circuit. Would A or B be the correct calculation? My main doubt is if the voltage drop due to the feeder cable should be divided by the voltage of the secondary side of...

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