免费配电箱负荷计算器
计算配电箱的总负荷，用于电气面板容量规划。
Total Amperage
86.7 A
Total Amperage vs General Lighting & Receptacles
公式
## Panel Load Calculation Add all branch circuit loads in watts. Divide by the panel voltage to get total amperage. Compare against the panel main breaker rating. Standard residential panels are 100A, 150A, or 200A at 240V. **Total Amps = Total Watts / Voltage**
计算示例
Typical home: 4800W lighting, 3000W kitchen, 1500W laundry, 5000W HVAC, 4500W water heater, 2000W other.
- 01Total = 4800 + 3000 + 1500 + 5000 + 4500 + 2000 = 20,800W
- 02Amps = 20,800 / 240 = 86.7A
- 03Minimum panel = 100A (round up to next standard)
常见问题
Does this include NEC demand factors?
This is a simplified calculation. The NEC allows demand factors (e.g., first 3000W of general lighting at 100%, remainder at 35%) which can significantly reduce the computed load.
When should I upgrade to a 200A panel?
If your calculated load exceeds 80% of a 100A or 150A panel, or if you plan to add major loads like an EV charger, consider a 200A panel.
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