Federal Pacific • Zinsco • 200 Amp Upgrades • Sub-Panels • Permitted & Inspected
A surprising number of Maryville homes are still operating on electrical panels that were sized for a different era of household demand. Sixty-amp services. One-hundred-amp services in homes with central air, electric ranges, EV chargers, and finished basements all drawing simultaneously.
The panel is the heart of the home's electrical system. When it's undersized, aged, or compromised, the symptoms range from minor to severe.
Union Electrical Service handles panel upgrades, replacements, and repairs across Maryville, TN. The work is precise, permitted, code-compliant, and done by licensed electricians with documented experience on panels of every era and manufacturer found in this region.
From 60/100 amp to modern 200 amp service. Full replacement with utility coordination and inspection.
Supports modern loads: EV chargers, HVAC, electric appliances, and more.
Main breaker, bus bar, neutral, and lug repairs on sound panels.
Garages, basements, workshops, and ADUs with proper feeder and grounding.
Day -7: Site assessment and written quote.
Day -3: Permitting and utility coordination.
Day 0: Utility disconnect, old panel removal, new panel installation, reconnect, and testing.
Day +1 to +5: Final inspection and documentation.
Power is typically off for most of one day. We schedule around your needs.
"Bought an older home with a Federal Pacific panel. Union came out, did the assessment, gave us a fixed quote, and did the upgrade in a single day."
— Thomas Reinhardt, Maryville
"Union upgraded us to 200 amps, installed the EV outlet, and added whole-house surge protection. Smart bundling."
— Angela Vasquez, Maryville, TN
Federal Pacific (Stab-Lok), Zinsco, and certain Sylvania panels have documented safety concerns. Many insurance companies now require replacement.
Replacement is a standard one-day job that brings your home up to code and resolves insurance concerns.
A standard 200-amp upgrade in a Maryville, TN home is typically a one-day job. Power is off for most of the day.
"Working" and "adequate" are different. We give honest assessments — including telling you when an upgrade isn't needed.
Yes. Panel upgrades require permits in Maryville. We pull the permit, coordinate inspection, and provide documentation.
Sometimes. We perform a load calculation and tell you whether an upgrade is needed.
Get a clear, honest evaluation of your current panel. No pressure sales pitch — just professional advice.
Click Here to Call (888) 355-9624Whether for insurance, EV charger readiness, or peace of mind — we're here to help.