Electrical Load Calculator
Calculate electrical service size, demand loads, and panel schedules using NEC Article 220 demand factors. Supports residential and commercial building types with cable sizing and phase balancing.
NEC (NFPA 70) · IEC 60364 · AS/NZS 3000
Building
Unit lighting load:33 VA/m2
Load Entries
Auto-calculated: 6,600 VA
Dedicated receptacles
Demand Breakdown
- Connected
- Demand
Panel Schedule
| Ckt | Description | VA | Bkr (A) | Wire |
|---|---|---|---|---|
| 1 | Range(s) x1 | 12,000 | 50 | #8 |
| 2 | Heating | 10,000 | 45 | #8 |
| 3 | General lighting | 6,600 | 30 | #10 |
| 4 | AC unit | 5,000 | 25 | #12 |
| 5 | Dryer(s) x1 | 5,000 | 25 | #12 |
| 6 | General receptacles | 3,600 | 15 | #14 |
| 7 | Small-appliance circuits | 3,000 | 15 | #14 |
Service Summary
Service Size
150ATotal Connected
45.2kVA
Total Demand
33.9kVA
Main Breaker
150A
Service Conductor
#1/0 AWG
Demand Ratio
74.9%
Demand / Connected
NEC (NFPA 70)