Electrical Panel Upgrade & Replacement

Electrical panel upgrade and replacement in Denver — NEC 2023, AFCI/GFCI, Xcel-coordinated

100A to 200A and 200A to 400A service upgrades with permit pull, Xcel meter disconnect, and city inspection coordination. Master Electrician sign-off on every permit.

Electrical panel upgrade and replacement in Denver — NEC 2023, AFCI/GFCI, Xcel-coordinated

A 100-amp or 150-amp panel in a pre-1980 Denver home cannot safely power a modern household. EV chargers, heat pumps, induction cooktops, and home offices push older panels into chronic overload — tripping breakers repeatedly and, in the worst case, causing arc faults or electrical fires. Insurance companies and home-sale inspectors increasingly require panel replacement before issuing or renewing coverage.

We start every panel upgrade with a Manual J-style load calculation to confirm the right service size. A 200A service handles most modern Denver homes; larger homes with EV chargers, hot tubs, and EV-ready garages may need 400A. Then we pull the City of Denver electrical permit and coordinate with Xcel Energy for the meter disconnect — Xcel must pull the meter before panel replacement and reconnect after city inspection.

Every new panel is NEC 2023-compliant: AFCI protection on bedroom and living-area circuits, GFCI in wet locations, tamper-resistant receptacles, and proper grounding and bonding throughout. Older homes often have aluminum feeders or undersized ground rods that require concurrent replacement. The Master Electrician signs off on every permit at close-out.

What's included

  • Manual J-style load calculation and service sizing
  • City of Denver permit + Xcel Energy meter coordination
  • AFCI / GFCI / tamper-resistant compliance (NEC 2023)
  • Aluminum feeder + grounding electrode system upgrade
  • Square D QO or equivalent panel with labeled directory
  • 5-year workmanship warranty

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Electrical Panel Upgrade & Replacement — common questions

How long does a panel upgrade take?
Most 100A-to-200A residential upgrades complete in 1 day on-site once Xcel disconnects the meter. Permit pull and Xcel scheduling typically takes 1-2 weeks ahead of the work date. Larger 400A upgrades or panel relocations can extend to 2-3 days.
Does insurance require a panel upgrade?
Increasingly yes — many carriers now require panel replacement when underwriting policies on homes with 100A or smaller service, knob-and-tube, or aluminum feeders. Real-estate inspections also flag undersized or aging panels as conditions on closing.
Will I lose power during the upgrade?
Yes, but only for the work window. Xcel disconnects the meter in the morning, we replace the panel, the city inspects, and Xcel restores service — typically same day for residential. We coordinate timing so the outage falls when it is least disruptive (we can support generator power for critical loads if needed).
What is the difference between 200A and 400A service?
200A is standard for modern single-family homes with EV charging, heat pump, and electric range. 400A service supports larger homes (4,000+ sq ft), multiple EV chargers, EV-ready secondary panels in garages, and homes with electric pool heaters or large workshops. We size from the load calc, not from the gut.

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