Amperage test in 3 wire 1 HP submersible motor

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by ballvalve, Jul 28, 2020.

  1. ballvalve

    ballvalve General Engineering Contractor

    Joined:
    Dec 28, 2009
    Occupation:
    "retired" and still building and troubleshooting
    Location:
    northfork, california
    Can't find a good answer in the AIM manual. While testing a 30 year old pump motor in the well, the Yellow and black motor leads read 9.3 amps draw. The red lead is drawing 1.3 amps. Capacitor run type box. Is that a safe value and what are the limits of amp draw to consider preventative maintenance?
     
  2. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    SFA for a 1HP is 9.8 amps. Capacitor run probably makes it 9.3 amps. As long as it doesn't draw over 9.8 you are good. Low amps at full flow are a better indication of a worn pump than high amps.

    There really isn't any preventive maintenance you can do except to limit the cycling. On for a minute and off for five isn't bad if it only happens a few times. But running 24/7 that could be 240 cycles a day, which is excessive. :)
     
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