The electrical panel in your home is the central distribution point for every circuit that powers your lights, appliances, heating and cooling systems, and devices. Like most infrastructure in your home, panels have a finite lifespan and a finite capacity — and as modern homes demand increasingly more electrical power, many older GTA panels are struggling to keep up.

This guide explains how to recognise when a panel upgrade is needed, what the upgrade process involves, and why many Toronto homeowners are finding that a panel upgrade is not an optional improvement but a necessary one.

How to Tell If Your Panel Needs Upgrading

Your Home Has 100-Amp Service

Most Toronto homes built before the mid-1990s were originally wired with 100-amp electrical service. When these homes were built, the typical electrical load — a few appliances, lighting, and perhaps a central air conditioner — was comfortably within that capacity. Today’s homes run significantly more electrical load: multiple televisions and computers, larger appliances, electric vehicle chargers, heat pumps, and increasingly electrified heating and cooking systems.

If your home has 100-amp service and you’re adding any significant new electrical loads — particularly an EV charger, a hot tub, a second air conditioner, or converting from gas to electric cooking or heating — a panel upgrade to 200-amp service is likely necessary before the new circuits can be added.

You’re Frequently Tripping Breakers

A circuit breaker that trips occasionally under genuinely heavy load is doing its job — protecting the circuit from overheating. A breaker that trips regularly under normal use is telling you that the circuit is consistently at or above its rated capacity. Multiple breakers tripping frequently, or a main breaker that trips, indicates that the panel as a whole is overloaded and needs attention.

You Have a Federal Pioneer or Zinsco Panel

Certain older panel brands have well-documented safety concerns. Federal Pacific Electric (FPE) panels with Stab-Lok breakers and Zinsco panels were installed in many Ontario homes through the 1960s and 70s and have been associated with breakers that fail to trip under overload conditions — a serious fire risk. If your home has either of these panel types, replacement is strongly recommended regardless of whether you’re adding new electrical capacity.

Fuse Box Instead of Breakers

If your home still has a screw-in fuse box rather than a circuit breaker panel, it predates modern electrical standards significantly. Fuse boxes cannot be upgraded with additional capacity and represent a meaningful safety and insurance risk — many home insurers will not provide coverage or will charge substantially higher premiums for homes with fuse boxes.

An electrical panel upgrade is a substantial electrical project that typically takes a full day for a licensed electrical contractor. The process involves:

• Coordinating with your electricity utility (Toronto Hydro, Alectra, or Hydro One) for temporary service disconnection
• Removing the existing panel and installing the new panel enclosure
• Transferring existing circuits to the new panel
• Adding new circuits as required for increased capacity
• Installing a new service entrance cable from the meter to the panel if upgrading amperage
• Obtaining required permits and coordinating ESA inspection

All panel upgrade work in Ontario requires an ECRA/ESA licensed electrical contractor and must be permitted and inspected by the Electrical Safety Authority. Power Squad manages the complete process from permit application through inspection.

Cost and Return on Investment

A 100-amp to 200-amp panel upgrade in the GTA typically costs between $2,500 and $4,500 depending on the complexity of the existing installation and any additional work required. This is a meaningful investment but one that typically pays dividends in several ways: it enables the addition of high-value electrical loads like EV chargers, it eliminates safety risks from aging equipment, it may reduce home insurance premiums, and it adds measurable value to the home in the GTA real estate market where 200-amp service is increasingly expected by buyers.