NEC Panel Schedule Calculator
Calculate panel load schedules per NEC Article 220, including connected loads, demand factors, total load, and minimum service/feeder sizing.
Panel Information
Circuit Loads
Enter each circuit's breaker size and connected load. Select load type for NEC demand factor application.
Additional Loads (NEC 220.14 / 220.82)
Formulas Used
General Lighting Load (NEC 220.12):
VA = Floor Area (sq ft) × 3 VA/sq ft
Lighting Demand Factor (NEC 220.42, Table 220.42):
First 3,000 VA @ 100% + Next 3,001–120,000 VA @ 35% + Remainder @ 25%
Cooking Equipment Demand (NEC Table 220.55, Column C — 1 unit):
≤ 12 kVA → 8 kVA demand; > 12 kVA → 8 kVA + 5% per kW above 12 kVA
Dryer Demand (NEC 220.54):
Demand = max(5,000 VA, Nameplate VA) × 100% (1 unit)
Fixed Appliance Demand (NEC 220.53):
< 4 appliances → 100%; ≥ 4 appliances → 75% of total
Motor Load (NEC 430.24):
Demand = Largest Motor × 125% + Sum of remaining motors × 100%
Non-Coincident Loads — HVAC/Heat (NEC 220.60):
Demand = max(HVAC VA, Electric Heat VA)
Minimum Service Ampacity:
Single-Phase: I = Total Demand VA ÷ Voltage
Three-Phase: I = Total Demand VA ÷ (Voltage × √3)
Assumptions & References
- Based on NEC 2023 (NFPA 70) standard calculation method (Article 220)