Is Your Panel Big Enough? Electrical Panel Upgrades in Older Boston Homes

Half the houses we work in around Boston still run on 100-amp service, and plenty of triple-decker units are on 60. Here is how to tell if yours is holding you back, and what an upgrade involves.

Signs your panel is at its limit

• Breakers trip when the microwave and the toaster run together
• Lights dim when the dryer or the AC kicks on
• A panel with no open slots, or tandem breakers stacked in to make room
• Fuses instead of breakers, or a brand with a known failure history (Federal Pacific and Zinsco panels should be replaced, full stop)
• Rust, scorch marks, a buzzing sound, or a warm panel cover
• You are adding an EV charger, a heat pump, an induction range, or a finished basement

100 amps vs 200 amps

A 100-amp panel was standard for decades and still runs a modest house with gas heat and gas cooking. Add electric heat, central AC, a Level 2 EV charger, or an electric range, and you are past it. A 200-amp service is the current standard and gives you room for whatever the next twenty years bring. For most Boston homes doing any real renovation, it is the right move.

What the upgrade involves

1. Load calculation. Our electrician adds up what is in the house and what you are planning, and confirms the size you actually need.
2. Utility coordination. Going to 200 amps usually means a new meter socket and sometimes a new service drop from the street. We handle the Eversource or National Grid request.
3. Permit and inspection. Required in every Massachusetts town, pulled under a licensed electrician.
4. The swap. Power is off for most of a day. New panel, new breakers, every circuit labeled.
5. Grounding and bonding. Older homes often fail here. Code requires it to be brought current when the panel is replaced.

Triple-decker and condo notes

In a multi-family, each unit usually has its own panel fed from a common meter bank in the basement. Upgrading one unit sometimes means upgrading the main service for the building, which is a conversation with the other owners or the association before any work starts. We have done both and we will tell you which one you are looking at.

Timing it with other work

If you are opening walls for a kitchen, a bath, or a water damage rebuild, that is the cheapest time to run new circuits and the right time to look at the panel. Every restoration job we do gets an electrical check before the walls close, because the water that soaked the drywall usually reached the wiring too.