Electrical panel upgrade and replacement

If you have 100 amps or less and are adding an EV charger, heat pump or electric range, or your panel is a Federal Pacific, Zinsco or fuse box, ask an electrician for a load calculation.

Usually most of one working day, depending on the scope and how quickly the utility reconnects.

Yes, in essentially every US jurisdiction. The electrician pulls it and schedules the inspection.

Signs include no open breaker spaces, frequent tripping of the main breaker, double-tapped breakers, a 60 or 100 amp service in a home adding central air, an EV charger or a heat pump, and an electrician's load calculation showing the service is near capacity.

A panel replacement swaps the breaker box at the same amperage. A service upgrade increases the amperage, which usually means a new meter base and service entrance cable and coordination with the utility.

The on-site work is often completed in a day. Permits, inspections and scheduling the utility disconnect and reconnect can add days or weeks before and after.

Yes, for much of the work day. The utility usually disconnects power so the electrician can work safely, then reconnects after the work is ready or has passed inspection.

For most single-family homes, 200 amps is enough even with an EV charger and a heat pump. The right size depends on a load calculation, which also considers electric heat, cooking, a pool and future plans.

Electricians commonly recommend replacing Federal Pacific panels with Stab-Lok breakers and many Zinsco panels because of reports of breakers that fail to trip. Insurers may ask about them too.

Sometimes. A load-management device or smart panel can share capacity between large loads, such as an EV charger and a dryer, without increasing the service size.