Ask the Question Forum Index Ask the Question
FREE question and answer forums in a variety of subjects
 
 FAQFAQ   SearchSearch   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Circuit breaker hums

 
Post new topic   Reply to topic    Ask the Question Forum Index -> Ask the Electrician
Author Message
pbierre



Joined: 24 Nov 2007
Posts: 1
Location: Pleasanton CA
PostPosted: Sat Nov 24, 2007 7:42 pm    Post subject: Circuit breaker hums Reply with quote
I'm in the US, and have a circuit breaker that hums so loud it is annoying (60Hz). When switched off, ah, the sounds of silence. I replaced the circuit breaker, and the new one hums just the same.

It's a 40A 2-pole CB, which switches 240VAC. The original purpose, a laundry outlet, is no longer in use. However, someone added some single-sided loads (120V), which the CB switches.

Is this a problem with unbalanced loading?

Any ideas how to silence this noise?

Pierre
Back to top
b
Moderator


Joined: 31 Aug 2004
Posts: 301
Location: michigan
PostPosted: Fri Nov 30, 2007 3:11 am    Post subject: Reply with quote
When you replaced the circuit breakers why didn't you replace with a 15 or 20amp single phase (dependent on the devices in your circuit)? The 40amps is probably not rated for your end use accordingly. Sounds like it needs to be properly configured for the 120V usage.
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Ask the Question Forum Index -> Ask the Electrician All times are GMT
Page 1 of 1

 




Powered by phpBB © 2001, 2005 phpBB Group
Mortgages | Remortgages | Hotels in Krakow | Debt Consolidation | Montana Music