Why Does My Breaker Keep Tripping? Ottawa Electrician Explains
Quick Answer β Why Your Breaker Keeps Tripping
A breaker keeps tripping because it’s doing its job β protecting your home from electrical fire. The most common causes are: overloaded circuits (too many appliances on one circuit), short circuits (damaged wiring), or a ground fault (moisture in an outlet). If your breaker trips once and resets fine, it’s usually an overload. If it trips repeatedly or immediately after resetting, stop resetting it and call a licensed electrician β you likely have a wiring fault that needs professional repair.
β‘ In Ottawa, same-day electrical repair is available β call (613) 518-5010.
If your breaker keeps tripping in your Ottawa home, you’re not alone β it’s one of the most common electrical complaints we get from homeowners in Kanata, Barrhaven, Nepean, Orleans, and across the city. A tripping breaker is annoying, but it’s actually your electrical panel doing exactly what it’s designed to do: cutting power before something dangerous happens.
The real question isn’t “why is my breaker tripping?” β it’s “what is causing the unsafe condition that makes it trip?” In this guide, the licensed electricians at Ottawa Electric Service walk you through every common cause, which ones you can troubleshoot yourself, and when you need to call a pro for circuit breaker repair.
How Circuit Breakers Work (And Why They Trip)
Before diagnosing the problem, it helps to understand what a circuit breaker actually does. Your electrical panel contains breakers that act as safety switches for each circuit in your home. Each breaker is rated for a specific amperage β typically 15A or 20A for standard circuits.
When a circuit draws more current than it’s rated for, the breaker’s internal mechanism heats up and “trips” β physically disconnecting the circuit from power. This prevents the wires inside your walls from overheating, melting their insulation, and potentially starting an electrical fire.
There are three types of breaker trips, and each points to a different problem:
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Overload Trip
Too many devices drawing power on one circuit. The breaker trips slowly after running for minutes or hours. Most common cause.
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Short Circuit Trip
Hot wire touches neutral or another hot wire, creating a massive surge. The breaker trips instantly β often with a pop or spark. Most dangerous.
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Ground Fault Trip
Current leaks to ground through moisture or damaged insulation. GFCI breakers and outlets detect even tiny leaks and trip immediately. Common in kitchens/bathrooms.
8 Reasons Your Breaker Keeps Tripping in Ottawa
Here are the causes we see most often during electrical inspections in Ottawa homes, ranked from most to least common:
Overloaded Circuit
The #1 reason a breaker keeps tripping. A typical 15-amp circuit handles about 1,800 watts. If you’re running a microwave (1,200W), a toaster (1,400W), and a coffee maker (1,000W) on the same kitchen circuit β that’s 3,600W on a 1,800W circuit. The math doesn’t work, and the breaker trips to prevent overheating.
π§ Fix: Redistribute devices across different circuits, or have an electrician add a dedicated circuit.
Short Circuit in Wiring
When a hot wire touches a neutral wire β either inside a wall, at an outlet, or inside an appliance β the current spikes dramatically. Short circuits trip the breaker instantly and may produce a burning smell or visible scorch marks at outlets. This requires immediate professional wiring inspection.
π« Fix: Do NOT reset the breaker. Call a licensed electrician immediately.
Ground Fault
Occurs when current escapes its intended path and flows to ground through water, metal, or a person. Common in bathrooms, kitchens, and outdoor outlets where moisture is present. Ottawa’s spring thaw and humid summers make this especially common in basements.
π§ Fix: Test GFCI outlets (press the “TEST” button). If the GFCI won’t reset, the outlet or wiring needs replacement.
Faulty or Worn-Out Breaker
Breakers wear out over time β especially in older Ottawa panels that have been tripping and resetting for decades. A weak breaker trips at lower amperage than its rating, shutting down circuits that should be running fine. Common in panels over 20β25 years old.
π§ Fix: A licensed electrician replaces the faulty breaker ($150β$300 installed).
A Specific Appliance Is Faulty
Sometimes it’s not the wiring at all β it’s a single appliance with an internal short. Hair dryers, space heaters, old refrigerators, and window AC units are frequent offenders. The appliance draws a surge on startup or has damaged internal wiring.
π§ Fix: Unplug everything on the circuit, then plug devices back in one at a time to identify the culprit.
Arc Fault (Damaged Wiring Behind Walls)
Wires that have been nicked by nails, chewed by rodents, or degraded by age can create electrical arcs β tiny sparks inside your walls. Arc fault circuit interrupter (AFCI) breakers are designed to detect these and trip before a fire starts. This is common in older Ottawa homes, especially those with aluminum wiring or knob-and-tube.
π« Fix: Requires professional diagnosis with specialized equipment. Do not ignore AFCI trips.
Outdated 100-Amp Panel
Many Ottawa homes built before 2000 still run on 100-amp panels. With modern demands β EV chargers, central AC, electric dryers, and home offices β a 100-amp panel simply runs out of capacity. The panel itself becomes the bottleneck.
π§ Fix: Upgrade to a 200-amp panel ($1,800β$4,000 in Ottawa).
Power Surges from Hydro Ottawa
Summer lightning storms, downed power lines, and grid fluctuations send voltage spikes through your home. Sensitive breakers β especially AFCI and GFCI types β may trip during surges even when nothing is wrong inside your home.
π§ Fix: Install a whole-home surge protector at your panel ($200β$500 installed).
β οΈ The Danger of Repeatedly Resetting a Tripping Breaker
Every time you force-reset a breaker that keeps tripping, you’re overriding a safety device. If the underlying cause is a short circuit or arc fault, you’re allowing dangerous current to flow through damaged wiring β even if it’s only for a few seconds before it trips again. After 2 resets with no improvement, leave the breaker OFF and call an electrician.
How to Diagnose a Tripping Breaker Yourself (Safely)
Before calling an electrician, try these safe diagnostic steps to narrow down the problem:
Identify Which Breaker Is Tripping
Open your panel and look for the breaker that’s in the middle position (between ON and OFF). Note the label β is it a bedroom, kitchen, bathroom, or general circuit?
Unplug Everything on That Circuit
Go to every outlet and switch on the affected circuit and unplug all devices. Turn off all lights on that circuit.
Reset the Breaker Properly
Push the breaker fully to the OFF position first, then flip it to ON. If it holds β the problem is one of your devices. If it trips immediately with nothing plugged in β you have a wiring problem and need an electrician.
Plug Devices Back In One at a Time
If the breaker held, reconnect one device at a time and wait 2β3 minutes between each. When the breaker trips, you’ve found your problem device. Repair or replace it.
Check for Visible Damage
Look at the outlets and switches on the circuit. Are any warm to the touch? Discoloured? Smell like burning? Any signs of damage mean you need professional help β don’t plug anything back in.
π‘ Ottawa Electrician’s Pro Tip
Take a photo of your electrical panel with the door open. Label which breaker controls which room (use masking tape and a marker). In an emergency, this saves critical time β both for you and for any electrician who arrives for a service call.
Breaker Won’t Stop Tripping?
Our licensed electricians diagnose the root cause β not just reset the breaker. Same-day service in Ottawa.
Breaker Tripping by Room: What’s Causing It?
The room where your breaker keeps tripping is often the biggest clue to the cause:
Circuit Breaker Repair Cost in Ottawa (2026)
Here’s what Ottawa homeowners typically pay for circuit breaker repair and related electrical fixes:
π‘ Save Money: Diagnose Before You Upgrade
Some companies push panel upgrades as the fix for every tripping breaker. While it’s sometimes the right answer, many tripping breaker issues are solved with a simple $150β$300 breaker replacement or a $200 dedicated circuit. A good electrician diagnoses before recommending expensive upgrades.
When to Call an Electrician (Don’t Wait on These)
Some tripping breaker situations are minor inconveniences. Others are emergencies. Call a licensed Ottawa electrician immediately if you notice any of these:
π¨ Call an Electrician Right Away If:
- The breaker trips immediately every time you reset it
- You see scorch marks or discolouration on your panel or outlets
- You smell burning plastic or a metallic/fishy odour near outlets or the panel
- The panel or breaker is hot to the touch
- You hear buzzing, crackling, or sizzling inside walls or at the panel
- Lights flicker or dim when the breaker is on
- The breaker trips when nothing is plugged in on the circuit
- Your home has aluminum wiring or knob-and-tube wiring
Ottawa-Specific Causes of Breaker Tripping
Ottawa’s climate and housing stock create some unique breaker tripping scenarios that don’t apply everywhere:
- Spring thaw moisture β Melting snow seeps into basement wiring and outdoor junction boxes, causing ground faults every MarchβApril
- Summer AC overload β Running central AC, a dehumidifier, and a window unit simultaneously overwhelms 100-amp panels during July/August heat waves
- Winter space heater stacking β Portable space heaters draw 1,500W each. Two on one circuit = instant breaker trip. Ottawa’s -30Β°C winters encourage this mistake
- Older housing stock β Homes in The Glebe, Centretown, Sandy Hill, and Old Ottawa South often have 60+ year old wiring with deteriorated insulation
- Hydro Ottawa grid fluctuations β Summer brownouts and ice storm-related surges trip sensitive AFCI/GFCI breakers
- EV charger installations β Homeowners who install Level 2 chargers without a panel upgrade find their existing circuits can’t handle the added 30β40 amp draw
How to Prevent Breaker Tripping in Your Ottawa Home
Follow these practices to reduce the chance of a breaker tripping unexpectedly:
- Know your circuit map β Label every breaker in your panel so you know which rooms and outlets are on which circuits
- Spread high-draw appliances β Never put two 1,000W+ appliances on the same circuit (use different outlets in different rooms)
- Install dedicated circuits for heavy users β Microwaves, kitchen appliances, space heaters, hot tubs, and EV chargers should each have their own circuit
- Upgrade your panel β If you’re on a 100-amp panel with a modern lifestyle, a 200-amp upgrade eliminates most overload issues
- Schedule an electrical inspection β Catch worn breakers, loose connections, and deteriorating wiring before they cause trips
- Install surge protection β Stops external voltage spikes from tripping your breakers and damaging electronics
- Replace old smoke detectors on dedicated circuits β Aging hardwired detectors can develop faults that trip AFCI breakers
Breaker Repair Service Areas in Ottawa
Ottawa Electric Service provides fast circuit breaker repair and electrical diagnostics across the Ottawa region:
Frequently Asked Questions: Breaker Tripping
Why does my breaker keep tripping with nothing plugged in?
This almost always indicates a wiring problem β either a short circuit in the wiring inside your walls, damaged wire insulation, a faulty outlet or switch, or a worn-out breaker. This requires a licensed electrician to diagnose with testing equipment. Do not keep resetting the breaker.
Is a tripping breaker dangerous?
The tripping itself is a safety feature β it’s the condition causing the trip that can be dangerous. An overloaded circuit is a mild risk. A short circuit or arc fault is a serious fire hazard. If your breaker trips repeatedly, the underlying cause needs professional attention.
How many times can I safely reset a tripping breaker?
Try resetting once after unplugging all devices on the circuit. If it trips again immediately, stop. Repeatedly forcing a breaker to reset overrides its safety function and can cause overheating in your wiring. Two resets maximum β if it trips a third time, leave it off and call an electrician.
Can a breaker go bad and need replacement?
Yes. Breakers wear out after years of use, especially if they’ve tripped and been reset many times. A weak or failing breaker may trip at lower amperage than its rating, or it may fail to trip when it should β both scenarios are dangerous. Breaker replacement in Ottawa typically costs $150β$300.
Why does my breaker trip when I turn on the AC?
Air conditioners draw a high startup current (inrush current) that can exceed the breaker’s rating momentarily. Causes include a failing compressor, a dirty condenser, a weak breaker, or an undersized circuit. If your AC trips the breaker every time, have both the electrical circuit and the AC unit inspected.
What does it cost to fix a tripping breaker in Ottawa?
A diagnostic service call costs $85β$150. A simple breaker replacement runs $150β$300. If the issue is a short circuit in your wiring, repair costs $200β$600 depending on accessibility. A new dedicated circuit costs $200β$500. If the problem is panel capacity, a full upgrade runs $1,800β$4,000.
What’s the difference between GFCI and AFCI breakers?
GFCI (Ground Fault Circuit Interrupter) breakers detect current leaking to ground β protecting against electrocution, especially around water. AFCI (Arc Fault Circuit Interrupter) breakers detect electrical arcing from damaged wiring β protecting against fires. Modern Ontario Electrical Code requires AFCI protection on most bedroom and living space circuits.
Does my old panel need to be upgraded if breakers keep tripping?
Not necessarily. A panel upgrade is warranted if you have a 100-amp panel and your total electrical demand exceeds its capacity, or if your panel uses obsolete breakers (Federal Pacific, Zinsco). But many tripping issues are solved with a single breaker replacement or adding a dedicated circuit β get a proper diagnosis first.
Can I replace a circuit breaker myself in Ontario?
Technically, homeowners can do some basic electrical work in Ontario, but working inside your electrical panel is extremely dangerous β exposed bus bars carry full utility voltage. A misstep can cause electrocution, arc flash burns, or panel damage. We strongly recommend hiring a licensed, ESA-certified electrician for any panel work.
How quickly can I get an electrician for a tripping breaker in Ottawa?
Ottawa Electric Service offers same-day electrical repair across the city, including Kanata, Nepean, Barrhaven, Orleans, and Centretown. For emergencies like breakers that trip immediately or panels showing signs of overheating, call us at (613) 518-5010 for priority dispatch.
Stop Guessing β Get a Professional Diagnosis
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