8 Signs Your Electrical Panel Needs Upgrading
Most GTA homes built before 2000 have electrical panels that were never designed for modern electrical loads — EV chargers, induction ranges, home offices with multiple monitors, and central AC all draw significantly more power than the kitchens and televisions of 30 years ago. Here are 8 signs your panel is struggling.
Breakers trip regularly
What causes it
Your panel's circuit breakers are tripping because circuits are overloaded — drawing more current than the breaker's rated capacity.
Why it matters
A breaker that trips occasionally is doing its job. A breaker that trips repeatedly on a circuit with normal usage is either undersized for modern demands or failing. Resetting the breaker is not a solution — it is a symptom.
What to do
Have a licensed electrician audit your panel load and circuit capacity. In many older GTA homes, circuits rated for 15 amps are now serving receptacles that power devices drawing 12+ amps continuously.
You have a Federal Pacific or Zinsco panel
What causes it
Federal Pacific Electric (FPE) Stab-Lok panels and Zinsco panels were installed in thousands of Canadian homes from the 1950s through the 1980s. Both have documented safety defects.
Why it matters
FPE Stab-Lok breakers have a known failure rate — they do not always trip when they should, allowing circuits to overheat. Studies have linked FPE panels to a significantly elevated risk of electrical fires. Zinsco panels have similar documented issues with breakers failing to trip and breakers fusing to the bus bar, making them impossible to turn off. These panels are not simply outdated — they are fire hazards.
What to do
If your home has one of these panels, replacement is strongly recommended regardless of whether you are experiencing symptoms. An electrician can confirm the panel manufacturer during an inspection.
Lights flicker or dim when appliances run
What causes it
When a motor-driven appliance (fridge compressor, dishwasher, washing machine) starts, it draws a large current surge. If your panel cannot handle this surge cleanly, the voltage drop causes lights on other circuits to flicker or dim.
Why it matters
Occasional minor flickering when a large appliance starts is normal in older homes. Persistent flickering, visible dimming of lights, or flickering that affects multiple rooms at once indicates the main service capacity is inadequate for your home's current load.
What to do
A 100-amp service — common in pre-1990 GTA homes — was standard when homes had a quarter of today's electrical devices. Many of these homes should be at 200 amps.
You are adding an EV charger
What causes it
A Level 2 EV charger (the standard home charger) draws 32 to 48 amps continuously for several hours. A 7.2 kW charger running for 8 hours consumes roughly 58 kWh — more electricity than many older Ontario homes consumed in an entire day.
Why it matters
Most 100-amp panels do not have the capacity headroom for an EV charger alongside normal household loads. Even some 200-amp panels may require a dedicated 60-amp circuit that does not exist.
What to do
Before ordering an EV charger, have an electrician assess your panel capacity. A panel upgrade may be required. The upgrade cost should be factored into your total EV charger installation budget.
You still have 60-amp or 100-amp service
What causes it
60-amp service was standard in Ontario homes built before the 1960s. 100-amp service was standard from roughly the 1960s through the 1980s. The Ontario Electrical Safety Code now recommends a minimum of 200 amps for new residential construction.
Why it matters
With central air conditioning, multiple computers, electric appliances, and EV charging, a 100-amp service is frequently inadequate for a modern GTA household. A 60-amp service is almost certainly inadequate and should be upgraded regardless of symptoms.
What to do
Check your main breaker — it is typically labelled with its amperage. If it reads 60 or 100, upgrading to 200 amps should be a priority in your home maintenance budget.
Outlets feel warm or you smell burning near the panel
What causes it
Heat at outlets indicates overloaded circuits or poor connections. A burning smell near the panel can indicate arc faults — electrical arcing inside the panel — which is a fire risk.
Why it matters
This is the highest-urgency sign on this list. A burning smell from your electrical panel is not something to monitor or wait on. Electrical arcing can ignite surrounding materials. This requires immediate attention.
What to do
Do not use the affected circuit. Call a licensed electrician the same day. If the smell is strong or persistent, contact your local fire department to assess fire risk before continuing to occupy the space.
Your insurance company is asking for an upgrade
What causes it
Insurance underwriters in Ontario have become increasingly aware of panel-related fire risks, particularly with knob-and-tube wiring, Federal Pacific panels, and 60-amp service. Many insurers now require upgrades as a condition of coverage.
Why it matters
If your insurer is asking you to upgrade your panel, this is both a practical and a financial signal. Failing to comply may result in non-renewal of your policy — leaving you uninsured.
What to do
Check the letter from your insurer carefully for the specific panel or service upgrade they are requiring. This is often a 100-to-200-amp service upgrade, replacement of a specific panel brand, or removal of knob-and-tube wiring.
You are finishing a basement or adding an addition
What causes it
A finished basement typically adds a bedroom, bathroom, living area, and potentially a kitchen — all with lighting, receptacles, and appliances. An addition adds further load. Your existing panel may not have the physical space for the additional circuits, let alone the capacity.
Why it matters
Adding circuits to an already-loaded panel without assessing total capacity is a common mistake that passes inspection but creates problems over time. The right time to assess your panel is before renovation work begins, not after.
What to do
Include an electrical panel assessment in your pre-renovation planning. A licensed electrician can determine whether your existing panel can support the new circuits or whether an upgrade should be included in the project scope.
The Federal Pacific and Zinsco problem — a closer look
Federal Pacific Electric (FPE) panels with Stab-Lok breakers were installed in millions of North American homes between the 1950s and 1980s. Independent testing and fire investigation data have consistently shown that these breakers fail to trip at a rate significantly higher than competing products — meaning an overloaded circuit may not shut off automatically.
Zinsco panels (and their rebranded variants, including GTE-Sylvania) have a different but equally serious defect: the aluminium bus bar and breaker design allows the breakers to fuse (bond) to the bus bar over time, making them impossible to turn off and sometimes impossible to remove safely.
Both panel types continue to function normally for years — even decades — before a failure event. This is precisely what makes them dangerous: they appear fine right up until they aren't.
If your home has either of these panel types, replacement is the right decision regardless of whether you are experiencing symptoms. The risk profile is simply too high to ignore.
What a panel upgrade costs in the GTA
A 100-to-200-amp service upgrade in the GTA typically costs $2,500 to $5,000 including the permit, new panel, and inspection. This is one of the most cost-effective home safety investments available — the upgrade has useful life of 30 to 40 years and can prevent fires, failed home sales, and insurance non-renewal.
Full breakdown: Electrical panel upgrade cost in Toronto 2026 →Think your panel needs upgrading?
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