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What To Do When The Main Circuit Breaker Trips Off

How to Identify an Electrical Problem: Tripping Main Circuit Breaker or Blown Fuse, What to do About a Home Electrical Problem.

 

Tripping Main Circuit Breaker
Electrical Question: The main switch in the fuse box has shut off three times, what could cause this?

This home electrical question came from: Kandi, a Homeowner from Houston, Texas.

Dave’s Reply:
Thanks for your electric wiring question Kandi.

Troubleshooting the Cause of a Tripping Main Circuit Breaker

Application: Electrical Troubleshooting, Testing Electrical Circuit Wiring.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester or Continuity Tester.
Estimated Time: Depends on experience and level of problem solving skills.
Precaution: Testing live wires is dangerous and should be done by an experienced individual only. Testing using a continuity tester should only be made after the circuit has been identified and turned OFF and Tagged.

Tripped Main Breakers and Electrical Circuit Problems

What to do about a Electrical Circuit Problem

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» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
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
NEC Codes for Home Electrical Wiring
....and much more.





Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.



« Should You Tap 220 Electrical Wiring for a 120 Volt Circuit? Wiring a Thermostat Controlled Heat Unit »

FAQs Frequently Asked Questions and Comments

One Response to “What To Do When The Main Circuit Breaker Trips Off”
  1. Forrest Brown says:

    My main panel 240V, 100A Seimans breaker would periodically trip off at very odd intervals. None of the normal trouble-shooting techniques worked. The problem was eventually traced to a combination of when the outdoor temperature was in excess of 95F and running the A/C unit or the Clothes Dryer. (The House built in 1985). Thermal trip units are supposed to be compensated for ambient temperatures, but it turns out that the Main breaker was sort of getting tired on hot days (so do I, come to think of it). Problem solved by replacement.

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