Household voltage too high or misreading multimeter?

Discussion in 'General Electronics Chat' started by bbeltran, Feb 16, 2009.

  1. bbeltran

    Thread Starter New Member

    Feb 16, 2009
    My little multimeter (DVM810), and my neighbors more professional one, each read my breaker panel voltage very high: 150 and 142 & climbing, respectively.

    I call Xcel energy and the tech reads the lines @ 124... within acceptable variance.

    What's going on here?


    PS: ---more (but likely irrelevant) background---
    I have a fancy power strip for my little audio recording setup. It's always been pegged at 128 -- the last of 20 LED steps that it displays for line voltage. I want to learn how to fix things like sound digital effects processors / recorders and am starting at the front door, so to speak.
  2. hgmjr


    Jan 28, 2005
    It sounds as though the DVM810 is measuring peak AC voltage while the Xcel Energy tech is using a TRUE RMS meter.

  3. bbeltran

    Thread Starter New Member

    Feb 16, 2009
    Thank you very much. I will read up on RMS METER. Your answer suggests that the LEDs on my power conditioner (PowerWerks 2020 ) are just a little too sensitive displaying 128 @ a true 124.

    Thanks for the great site. I can't wait to read the tutorial.

  4. ifixit

    Well-Known Member

    Nov 20, 2008
    Hi B,

    Did the Xcel energy guy come into your house to make the measurement? If not then your reading may still be correctly indicating high if there is a problem with the neutral connection in your panel or service entrance. A symptom of this is that the voltage varies depending what 120V devices are turned on in the house. 240V devices don't effect it. Have an electrician check it out if this is the case.