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  1. Rectified

    Unexpected frequency residential standby generator

    Lots of great hands-on field experience being relayed here. I am not an engineer, just an electrical contractor slightly out of my element (which is why I came here looking for answers). Over 40+ years, in this rural area of Northern California, I have installed quite a few residential standby...
  2. Rectified

    Unexpected frequency residential standby generator

    Thank you for your help, which led to the completion of the job. In the end, I used a resonant reed type of meter that a friend had stashed in his curio pile, and it was perfect. As suspected, there was no problem with the generator frequency at all, only difficulty reading it with my DMM. It...
  3. Rectified

    Unexpected frequency residential standby generator

    Thank you for these responses, which confirmed my suspicions about the DMM. (Yes, I did get it from the electrical section at Home Depot! Had to replace my old one when my truck got stolen awhile back.) I will try a different tack, and if I will be working with a lot more of these generators...
  4. Rectified

    Unexpected frequency residential standby generator

    The installation is a new 22kW Generac natural gas-powered standby generator in the U.S. At initial startup, with no load connected, the frequency readout is both abnormal and unstable, rising to about 419 Hz. I get the same reading at the automatic transfer switch and the generator (with the...

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