An electrical panel upgrade is one of the most consequential electrical jobs in a home — and one of the most commonly misunderstood. Many homeowners treat it as a commodity job where the only variable is price. In reality, the brand of panel, the ampere rating, the quality of the installation, and whether the work is properly permitted and inspected all determine whether you end up with a safe, code-compliant system that serves your home for 30 years — or a liability.

“The panel upgrade conversation is where I learn whether a homeowner has done their homework. The ones who ask me about the panel brand, whether Federal Pacific or Zinsco panels are being replaced (not just added to), whether AFCI breakers are included, and whether the electrical inspection is arranged — those homeowners get the best jobs. The ones who only ask about price are the ones most likely to get shortcuts.”

— Priya Nair, licensed master electrician and electrical safety advocate with 17 years of residential electrical experience in many regions

Understanding Why You Might Need a Panel Upgrade

Your home’s electrical panel may need upgrading for several reasons:

Capacity. A 100-amp panel was standard for homes built before the 1980s. Modern electrical loads — electric vehicle chargers (typically 40–50 amps each), heat pumps, induction ranges, hot tubs — can easily exceed 100-amp service. A 200-amp upgrade is now the standard for most residential homes.

Age and safety. Some older panel brands — notably Federal Pacific Electric (Stab-Lok), Zinsco, and some older Pushmatic panels — have documented safety issues. If your home has one of these, replacement is strongly recommended regardless of current capacity.

Insurance. Some insurers refuse to cover homes with certain older panel brands or will charge significantly higher premiums. Check with your insurer before and after any panel upgrade.

Code compliance. Adding significant new loads sometimes requires bringing the panel up to current code standards, including AFCI protection on certain circuits.

For a diagnostic guide: How Do I Know If My Electrical Panel Needs to Be Upgraded?

Questions About the Panel Itself

What panel brand and model are you specifying?

This is the most important question about a panel upgrade. Not all panels are equal. Reputable residential panel brands include:

  • Square D (Schneider Electric) — widely considered the gold standard for residential panels
  • Siemens — reliable, well-supported, widely used
  • Eaton (Cutler-Hammer) — solid residential option
  • Leviton — newer entrant but well-regarded

Panels to be cautious about: off-brand or unfamiliar names, or any contractor who refuses to specify the brand until after you’ve agreed to the price.

What a good answer looks like: A specific panel brand and model number specified in writing before you agree to the work.

What ampere rating is being installed?

200-amp service is the current standard for most residential homes. Some larger homes or homes with significant electrical loads (multiple EV chargers, whole-home electrification) may warrant 400-amp service. Ask what ampere rating is being proposed and why it’s appropriate for your home’s current and anticipated loads.

What a good answer looks like: A specific ampere rating with a rationale tied to your home’s actual electrical load.

How many circuit spaces will the new panel have?

A new panel should have enough spaces to accommodate your current circuits plus meaningful room for future additions. Ask how many spaces the new panel will have and how many are currently being used. A 200-amp panel with 24 spaces that’s immediately full at installation is a missed opportunity.

What a good answer looks like: A panel with at least 30–40 spaces for a typical family home, with a clear count of how many will be used at installation.

Will AFCI breakers be installed where required?

The the applicable electrical safety code requires arc-fault circuit interrupter (AFCI) protection on bedroom circuits and increasingly on other living areas. A code-compliant panel upgrade will include AFCI breakers on the required circuits. Ask specifically which circuits will have AFCI protection and confirm it meets current code.

What a good answer looks like: AFCI breakers specified for all code-required circuits, listed by name in the quote.

Questions About the Service and Meter

Is this a panel replacement only, or is the service entrance being upgraded?

A panel upgrade and a service upgrade are two different jobs. A panel replacement swaps the panel inside the home. A service upgrade involves your local electrical safety authority, your utility company, and the wiring from the street — it’s more complex, more expensive, and requires coordination with the utility for a temporary power disconnection.

Ask which is being proposed and what the process involves.

Will the utility need to be involved?

Service upgrades require the utility company (Toronto Hydro, Hydro One, Alectra, etc.) to disconnect power at the meter head, then reconnect after the new service is installed and your local electrical safety authority-inspected. Ask whether your utility needs to be contacted and who is responsible for coordinating with them.

What a good answer looks like: A clear explanation of whether utility coordination is required, and confirmation that the contractor handles it.

Questions About Safety and Compliance

Will the existing panel be fully decommissioned, or will any components be reused?

Some electricians perform a hybrid installation — keeping portions of the old panel and adding a new sub-panel or simply adding capacity. Ask specifically whether the old panel is being fully replaced or whether components are being reused, and why.

Is the existing wiring being inspected and addressed as part of this job?

A new panel connected to old, undersized, or damaged wiring is only part of the solution. Ask whether the existing branch circuit wiring will be inspected as part of the panel upgrade, and what happens if problems are found.

Will you check for and address any aluminum wiring?

Homes built in the late 1960s through the 1970s often have aluminum branch circuit wiring. Aluminum wiring requires specific connections and devices (rated for aluminum/copper use) to be safe. Ask whether your home has aluminum wiring and how it will be addressed.

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