TryBuildCalc

Electrical Load / Panel Size Verification Checklist

Essential Checklist+

Complete these critical checks before approving the work or proceeding to the next construction stage.

✓12 Inspection Points
✓4 Verification Categories
✓Load Input Accuracy+
  • Floor area measured per NEC 220.82's definition, not total lot or footprint area
  • Every fixed-in-place appliance entered at its actual nameplate VA/watt rating, not an estimate
  • HVAC nameplate VA/amps used directly, not converted from a BTU rating with an assumed efficiency
✓Demand Factor Application+
  • 10,000 VA / 40% demand factor confirmed applied to the general load subtotal, not the final total
  • Only the larger of heating or cooling load included, never both added together
  • Fixed appliances (including range/dryer) entered once at full nameplate VA, not also run through separate demand tables
✓HVAC & Load Selection+
  • HVAC configuration selected matches the actual equipment installed, not a default guess
✓Service Sizing & Code Compliance+
  • Final service size confirmed as a genuine standard size, rounded up from the calculated demand current
  • Confirmed the dwelling qualifies for a 100A-or-larger single service — not a smaller sub-100A legacy service
  • Confirmed this is a single dwelling unit on one service — not a duplex, multi-family, or commercial building
  • Confirmed this is a new/full-recalculation scenario, not an existing-service load-addition check (NEC 220.83)
  • Service sizing reviewed by a licensed electrician, and permit/utility coordination requirements confirmed
Full QC Checklist+

Verify load input accuracy, demand factor application, HVAC load selection, and service sizing/code compliance.

✓20 Inspection Points
✓4 Verification Categories
✓Load Input Accuracy+
  • Floor area measured per NEC 220.82's definition, not total lot or footprint area
  • Every fixed-in-place appliance entered at its actual nameplate VA/watt rating, not an estimate
  • Small-appliance and laundry circuit counts match the actual planned circuits, not just the code minimum
  • HVAC nameplate VA/amps used directly, not converted from a BTU rating with an assumed efficiency
  • All fixed-in-place appliances included, not just the range and dryer
✓Demand Factor Application+
  • 10,000 VA / 40% demand factor confirmed applied to the general load subtotal, not the final total
  • Only the larger of heating or cooling load included, never both added together
  • Heat pump with supplemental electric heat uses 100% compressor + 65% supplemental, confirmed against equipment specs
  • Electric space heating demand factor (65% vs. 40%) matches the actual count of separately controlled heating units
  • Fixed appliances (including range/dryer) entered once at full nameplate VA, not also run through separate demand tables
✓HVAC & Load Selection+
  • HVAC configuration selected matches the actual equipment installed, not a default guess
  • "Both A/C and Separate Electric Heat" selected whenever both systems genuinely coexist
  • Only the single largest heating/cooling system's nameplate used, not summed across multiple independent units
  • Reasonably foreseeable future loads (EV charger, hot tub, workshop) considered against the headroom shown
✓Service Sizing & Code Compliance+
  • Final service size confirmed as a genuine standard size, rounded up from the calculated demand current
  • Confirmed the dwelling qualifies for a 100A-or-larger single service — not a smaller sub-100A legacy service
  • Confirmed this is a single dwelling unit on one service — not a duplex, multi-family, or commercial building
  • Confirmed this is a new/full-recalculation scenario, not an existing-service load-addition check (NEC 220.83)
  • Calculated headroom above demand load reviewed and considered adequate for the project's needs
  • Service sizing reviewed by a licensed electrician, and permit/utility coordination requirements confirmed
Inspection Notes+
Use the latest approved drawings, specifications, and site measurements.
Complete all critical checks before proceeding to the next work stage.
Record deviations and confirm rectification where required.

Related Calculators & Guides

Electrical Load / Panel Size CalculatorOpen the related calculator and verify the current project inputs.

FAQ

Use it after collecting the project inputs and again before approving or closing the relevant work stage.
No. It supports verification but does not replace approved drawings, specifications, codes, manufacturer requirements, or professional inspection.