Residential · Franklin County & St. Louis, MO
If your home still runs on a 60-, 100-, or 150-amp panel — or you're seeing tripped breakers, flickering lights, or scorched outlets — it's time for a panel upgrade. CAS Electric installs 200-amp and 400-amp service upgrades across Franklin County and the Greater St. Louis area — Pacific, Washington, Union, Sullivan, St. Clair, Eureka, Wildwood, Villa Ridge, and Marthasville. We pull the permit, coordinate with Ameren, and get you inspected the first time.
Your electrical panel is the heart of your home's electrical system. It takes utility power from the meter and safely distributes it to every circuit in your house. When that panel is undersized, aging, or a known problem brand, everything downstream suffers — from nuisance breaker trips to real fire risk. A panel upgrade replaces the entire service: the meter base, the mast or service lateral, the main breaker, the panel itself, the grounding, and the neutral/ground bonding.
The most common reason we get called for a panel upgrade in the St. Louis and Franklin County area is simple capacity — a 100-amp panel that was fine in 1985 can't support a modern home with central A/C, an electric range, a hot tub, and an EV charger. The second most common reason is safety: Federal Pacific Stab-Lok and Zinsco panels are documented fire hazards, and most homeowner's insurance policies now flag them at renewal.
CAS Electric is owner-operated and licensed — the electrician who quotes your job is the electrician who does the work. We handle the permit application, the Ameren disconnect/reconnect coordination, and the local jurisdiction inspection. Most residential panel upgrades wrap up in a single day with power restored by dinnertime.
Panel upgrade pricing depends on your existing service, meter location, grounding, and Ameren coordination. Every home is different, so we come out, look at what you have, and provide a free written estimate before any work starts — no hourly surprises.
We look at your existing service, panel location, grounding, and what's feeding it from Ameren. You get a flat, written quote — no hourly meter running.
We pull the electrical permit and schedule the disconnect/reconnect with Ameren so you're not chasing paperwork.
New meter base, service entrance, panel, grounding, and breakers — most residential upgrades wrap in a single day.
The inspector signs off, power is restored, and you get the labeled panel directory before we leave.
Panel upgrade cost depends on your existing service, whether the meter has to move, grounding upgrades, and how far the breaker panel sits from the meter. Every job is different — we come out, look at your service, and give you a free flat written estimate before work starts. No hourly surprises.
Yes. A service or panel upgrade requires a permit and an inspection in every Franklin County and St. Louis-area jurisdiction. We pull the permit, schedule the inspection, and coordinate the disconnect/reconnect with Ameren so you don't have to.
If you're adding an EV charger, a hot tub, central A/C, an addition, or an electric range/dryer to an older home, 100 amps is usually not enough headroom. 200 amps is the modern residential standard and is what insurers and appraisers expect to see.
Most straightforward 200-amp residential upgrades are a one-day job. Power is off for several hours while we swap the service entrance, meter base, and panel. We schedule the inspection and reconnect for the same day whenever possible.
Yes — those are the most common panels we replace. Federal Pacific (Stab-Lok) and Zinsco panels are known fire/safety hazards and many insurers won't cover homes that still have them. We swap them for a modern 200-amp panel and bring grounding up to current NEC code.
Licensed, insured, owner-operated. We respond to all estimates within 1 business day.