Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable


Identifying The Cause of Dimming Lights

Can a weak breaker make lights dim than brighten? I have a bathroom light that does this but I also found that part of my basement does the same thing…

Electrical Question from Rick about Troubleshooting Dim Lights
Background: Rick, a Homeowner from Enfield, CT.

Question: Can a weak breaker make lights dim then brighten?  I have a bathroom light that does this , but I also found that part of my basement does the same thing and is on the same breaker.

Dave’s Reply:
Thanks for your electrical question Rick. The cause may be a deteriorating connection or splice in a junction box somewhere in the circuit, most likely in the basement where the lights appear to be normal but are on the same circuit. The junction boxes in this location should be opened and inspected for a loose or possibly burnt connection. If this is the case then the splice or connection will need to be carefully repaired.
There are instances where a circuit breaker connection to the main buss in the panel is beginning to weaken. If this is the case then a new circuit breaker will need to be installed into a different location of the panel. If the panel does not have a space that is available then the panel will need to be turned off and the damaged area will need to be repaired if possible. Another solution may be to replace a full size single pole breaker with a twin style circuit breaker.
If  the circuit breaker is in good working condition then check the connection at the neutral terminations for a loose connection and possibly discolored insulation due to heat from a loose and arcing connection.

The Following links will assist you with your electrical question:

For more information about Troubleshooting
Troubleshooting Electrical Wiring

This link is helpful as a Homeowner
Do-It-Yourself Electrical

Make sure not to miss these Resources for: More about Switches
Wiring Switches

Be Careful and Be Safe – Never Work on Energized Circuits!

For Best Results Consult a Licensed Electrical Contractor.
Locate An Electrical Contractor in Your Area

Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

» Click here to learn more about Home Electrical Wiring «
  repair electrical wiring  



» See the FAQs about Identifying The Cause of Dimming Lights
» Return to the Top of this Page

Add your Comment or Quick Electrical Question about:
Identifying The Cause of Dimming Lights

To Ask a Detailed Question Click Here:Home Electrical Question and get an Instant Reply.

It helps to provide the following within your Quick Electrical Question:

Please Include the following:
  • Your Location:
  • Your State, Country or General Location
  • Your Project:
  • What is being wired?
  • Device or Equipment Brand Name and Model #
  • Your Home Dwelling, or Location of the Project:
  • Is this a Home, Apartment, Condo, Flat, etc.?
  • About how old is the dwelling?
  • About You, Are you a:
  • Homeowner
  • Electrician or Contractor
  • Inspector
  • Student or Teacher
Remember, The more info I have, the better I can help you!
Thank You So Much.