1. GENERAL LIGHTING: Table 220.12
1500 sq ft × 3 VA = 4500 VA
Small appliances: 220.52(A)
2 circuits × 1500 VA = 3000 VA
Laundry: 220.52(B)
1500 VA × 1 = 1500 VA
Applying Demand Factors: Table 220.42.
First 3000 VA × 100% = 3000 VA
Next 1500 VA × 35% = 525 VA
Remaining 4500 VA × 25% = 1125 VA
Total 9000 VA 6600 VA 4650 VA
2. FIXED APPLIANCES: 220.53
Dishwasher = 1200 VA
Disposer = 900 VA
Compactor = 900 VA
Water heater = 4500 VA
= 7500 VA
= 7500 VA
Total 7500 VA × 75% = 5625 VA 5625 VA 4219 VA (120 V Loads × 75%)
3. DRYER: 220.54; Table 220.54
5000 VA × 100% = 5000 VA 5000 VA × 70% = 3500 VA
4. COOKING EQUIPMENT: Table 220.55; Notes
Col A 8000 VA × 80% = 6400 VA
Col B 8000 VA × 65% = 5200 VA
Col C 8000 VA × 55% = 4400 VA
Total 16000 VA 11200 VA × 70% = 7840 VA
5. HEATING or A/C: 220.60
Heating unit = 10000 VA × 100% = 10000 VA
A/C unit = 5000 VA × 100% = 5000 VA
Heat pump = 8000 VA × 100% = 8000 VA
Largest Load 10000 VA 10000 VA 7500 VA
6. LARGEST MOTOR: 220.14(C)
♦ 1800 VA × 25% = 450 VA 450 VA
N 1800 VA × 25% = 450 VA 450 VA
1ø service: PHASES I = 42190 VA / 240 V = 175.8 A
NEUTRAL I = 31469 VA / 120 V = 262.2 A
220.61(B) First 200 A × 100% = 200 A
Remaining 62.2 A × 70% = 43.5 A
Total 243.5 A
Parent Tip: Review the logic above to help your child master the concept of nec load calculation worksheet.
