As a licensed electrician working in Ontario, one of the most common upgrades I’m asked about is increasing a home’s electrical service from 100 amps to 200 amps. Many homeowners start thinking about this upgrade when they’re renovating, installing new equipment like EV chargers or hot tubs, or when they simply realize their existing electrical system is struggling to keep up with modern power demands.
Upgrading your electrical service can significantly improve the capacity, safety, and future readiness of your home.
What Is an Electrical Service Upgrade?
Your electrical service is the main power supply that comes from the utility company into your home. It feeds electricity into your main electrical panel, where it’s distributed to all the circuits in the house.
Many homes in Ontario—especially those built several decades ago—were originally designed with 100-amp service. At the time, that was more than enough to power lighting, a few appliances, and basic household needs.
Today, however, homes use far more electricity. Modern households often include:
- Large kitchen appliances
- Air conditioning systems
- Electric vehicle chargers
- Hot tubs and pools
- Home offices and electronics
- Electric heating or heat pumps
A 200-amp service upgrade increases the amount of electricity your home can safely draw from the utility grid, giving your electrical system more capacity to handle these loads.
Signs Your Home May Need a 200-Amp Upgrade
When I inspect a home’s electrical system, there are several signs that a service upgrade may be beneficial.
Homeowners often notice things like:
- Breakers tripping frequently
- Lights dimming when large appliances start
- A panel that is completely full with no space for new circuits
- Plans to add high-demand equipment such as EV chargers or hot tubs
- Major home renovations or additions
Even if your home isn’t currently experiencing electrical issues, upgrading the service can prepare the system for future electrical needs.
What’s Involved in a Service Upgrade?
Upgrading from 100 amps to 200 amps is more involved than simply replacing the electrical panel. The entire electrical service must be upgraded to handle the increased capacity.
When I perform this type of upgrade, the work typically includes:
- Installing a new 200-amp electrical panel
- Replacing the service mast and weatherhead
- Upgrading the service entrance cable
- Installing a new meter base
- Ensuring proper grounding and bonding
- Coordinating with the utility company for power disconnection and reconnection
Because the service connects directly to the electrical grid, this work must be carefully planned and completed according to Ontario electrical regulations.
Permits and Inspections in Ontario
In Ontario, electrical work is regulated by the Electrical Safety Authority, commonly known as the ESA.
Whenever I perform a service upgrade, I submit the required electrical notification to the ESA before the work begins. After the installation is completed, an ESA inspector reviews the work to ensure it meets the Ontario Electrical Safety Code.
Once the upgrade passes inspection, the homeowner receives a Certificate of Inspection, confirming that the electrical service has been installed safely and properly.
Benefits of Upgrading to 200 Amp Service
A 200-amp electrical service provides several important advantages for homeowners.
More Electrical Capacity
The most obvious benefit is the increased electrical capacity. A 200-amp service can support modern appliances, heating systems, EV chargers, and future upgrades without overloading the system.
Better Reliability
With more available power and properly sized circuits, homeowners often notice fewer breaker trips and more consistent electrical performance.
Future-Proofing Your Home
As homes continue to become more electrified—with electric vehicles, heat pumps, and smart technology—a 200-amp service ensures your home is ready for future electrical demands.
Improved Home Value
Upgraded electrical service is also a valuable selling point. Many buyers prefer homes that already have 200-amp service because it means the electrical system is capable of supporting modern living.
Planning Your Service Upgrade
If you’re considering upgrading your electrical service, it’s best to speak with a licensed electrician early in the process. I usually start by evaluating the home’s existing electrical system and calculating the expected electrical load to determine whether a 200-amp upgrade is the right solution.
From there, I coordinate the permits, inspections, and scheduling with the utility provider to complete the upgrade safely and efficiently.
A Smart Investment for Ontario Homes
Many homes across Ontario were built during a time when electrical demands were much lower than they are today. As homeowners add new technology and appliances, upgrading from 100 amps to 200 amps has become one of the most practical improvements you can make to your electrical system.
With the proper permits, professional installation, and inspection through the Electrical Safety Authority, a service upgrade can provide the power capacity and peace of mind needed to support modern living for years to come.
Call us for a FREE In home quote today!
Enrico’s Electrical Company
Your Ajax Electrician
Toronto & GTA
416-455-5796
Durham Region & Kawarthas
905-239-0077