Advertisement - Content continues below
Advertisement - Content continues below

Discuss Fuse box makes humming sound when off-peak water heating in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

Video of issue:
Hi

I’ve noticed a humming from my fuse box when my nightly off-peak water comes on.

When I first moved in I had a similar issue, albeit louder / more high pitched. An electrician replaced the contactor at the time.

It might be worth noting that that little grey box (I think that’s the contractor?) to the left of the breaker is slightly warm.

Any ideas?

Thanks
 
Advertisement - Content continues below

SparkyChick

Mod
Mentor
Arms
Esteemed
The buzzing is most likely to be the contactor and is nothing to worry about.

Contactors use electromagnets to pull a switch closed so the coils will buzz at the mains frequency.
 

littlespark

-
Arms
Esteemed
Advent Win
Some electricians have a stash of honey secreted in many places.

Think of Pooh Bear with an MFT

The buzzing may be the last of their special honeybees, who are nocturnal and only come awake at off peak times.

Or... as suggested, it possibly could be the contactor.
 
Advertisement - Content continues below

Reply to Fuse box makes humming sound when off-peak water heating in the Electrical Forum area at ElectriciansForums.net

Test Meter - Forum Sponsors since 2007!
This official sponsor may provide discounts for members
Advertisement - Content continues below
Advertisement - Content continues below

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
Advertisement - Content continues below
Top Bottom