I installed a new ceiling fan. When switched it on, I get 440v in the entire room circuit; I had stabiliser that showed the voltage. I was surprised. I took a multimeter and measured the voltage it too showed 440v. If I switch off the fan switch then the voltage comes down to 220v.

I removed the fan and connected a bulb over there and the voltage is not varying (it's at 220v as expected). Checked the Hot and Neutral line they seems to be fine as well.

Any idea on what could be going wrong here? How the fan can trigger this kind of voltage variation? 1 & 2 Are fan images & 3 is the switch.

  • I’d really like to see a photo of your panel. I’ve never seen a home with 480 service.
    – mreff555
    Jul 6 '20 at 10:40
  • Where are you at (which country)? is your fan on some kind of speed controller? photos of the wiring where the fan connects and where the controls for the fan are would help.
    – Jasen
    Jul 6 '20 at 11:23
  • 2
    It seems your photos didn't post...and yes, where on this planet are you? Jul 6 '20 at 11:45
  • And make sure you turn the power off at the circuit breaker before someone hurts himself or burns the house down!
    – FreeMan
    Jul 6 '20 at 13:14
  • 1
    Their other post says they live in India, which is also a question about electrical issues.
    – rtaft
    Jul 6 '20 at 18:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.