120V legs into breaker box not at the same voltage


  #1  
Old 10-22-14, 06:02 PM
J
Member
Thread Starter
Join Date: Feb 2014
Location: USA
Posts: 132
Upvotes: 0
Received 0 Upvotes on 0 Posts
120V legs into breaker box not at the same voltage

I noticed that when my refrigerator, coffee pot, and microwave are all running, everything runs at a lower audible frequency. I measured 106V at various outlets in the house this morning with those 3 appliances running. This evening, I removed the cover from the breaker box. I measured the voltage across the 2 legs from the meter: 250V. Then I measured each leg relative to neutral: 106V and 144V. Could anything other than my meter cause this problem? Do I need to call my power company first or an electrician?
 
  #2  
Old 10-22-14, 06:13 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,985
Received 199 Upvotes on 174 Posts
Voltage variations under load can indicate a loose neutral. If this affect everything in the house you problem is either in the service panel or ahead of the panel.

This problem can burn up sensitive electronics so you need to get it fixed.
 
  #3  
Old 10-22-14, 06:17 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 29,711
Upvotes: 0
Received 15 Upvotes on 13 Posts
Call the electric company now. Call the 24 hour number not customer service. They will check everything on their side for free.
 
  #4  
Old 10-22-14, 06:40 PM
J
Member
Thread Starter
Join Date: Feb 2014
Location: USA
Posts: 132
Upvotes: 0
Received 0 Upvotes on 0 Posts
Ok thanks for the advice. I called the 24-hour number, and they created an emergency ticket.
 
  #5  
Old 10-23-14, 11:25 AM
J
Member
Thread Starter
Join Date: Feb 2014
Location: USA
Posts: 132
Upvotes: 0
Received 0 Upvotes on 0 Posts
Just reporting back the results...
The power company discovered a break in the neutral wire between the alley and the meter. They worked through the night to repair it, and everything is working perfectly now.
 
  #6  
Old 10-23-14, 11:30 AM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 29,711
Upvotes: 0
Received 15 Upvotes on 13 Posts
Thanks for letting us know the out come.

Terminology note: You don't have 120 legs coming into your box. You have two 240 legs and one neutral wire.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: