A five-step estimate based on the supplied Load Calculation workbook. Enter actual equipment nameplate values before reviewing your service capacity.
01 General lighting & circuits
Floor area × 3 VA + small-appliance circuits × 1,500 VA + laundry circuits × 1,500 VA
Step 1 total: 10,500 VA
02 Heating & cooling
This workbook estimate adds the entered HVAC rows at 100%. Include each physical unit once. Actual NEC 220.82(C) calculations select the applicable heating/cooling demand.
Equipment
Quantity
VA per unit
Factor
Total VA
A/C Heat up to 8 kW
1×
0
A/C Heat up to 15 kW
1×
0
A/C Heat up to 20 kW
1×
0
Cond/Heat Pump to 2 T
1×
0
Cond/Heat Pump to 4 T
1×
0
Cond/Heat Pump to 5 T
1×
0
Other Electric Heating Device
1×
0
Step 2 total: 0 VA
03 Dedicated equipment
Quantities start at zero. Suggested VA values come from the workbook; replace them with actual labels. Enter each appliance in only one section.
Equipment
Quantity
VA per unit
Factor
Total VA
Electric Water Heater
1×
0
Refrigerator
1×
0
Freezer
1×
0
Dishwasher
1×
0
Disposal
1×
0
Range Hood
1×
0
Microwave
1×
0
Well pump
1×
0
Jacuzzi
1×
0
Pool Lights
1×
0
EVSE (continuous load)
1.25×
0
EVSE (continuous load)
1.25×
0
Step 3 total: 0 VA
04 Major equipment
Quantities start at zero. Suggested VA values come from the workbook; replace them with actual labels. Enter each appliance in only one section.
Equipment
Quantity
VA per unit
Factor
Total VA
Cook Range
1×
0
Cook Oven
1×
0
Clothes Dryer
1×
0
Water Heater
1×
0
Hot Tub
1×
0
Pool Light
1×
0
Pool Heater
1×
0
Step 4 total: 0 VA
Heat pump water heater
Use this row only if the same equipment is not already included above.
05 Service capacity estimate
General load: steps 1 + 3 + 4 + heat pump water heater
10,500 VA
First 10,000 VA at 100%
10,000 VA
Remaining general load at 40%
200 VA
Heating / cooling at 100%
0 VA
Total adjusted worksheet load
10,200 VA
42.5 A10,200 VA ÷ 240 V
Within the entered service rating on this estimate 157.5 A remaining.
Method: reproduces the supplied workbook’s arithmetic, including EVSE × 125% inside the general-load demand tier. This is not a verified NEC service design or a determination that a panel upgrade is required. Review method eligibility, HVAC selection, EVSE treatment, service conductors, and local requirements separately. Reference for optional dwelling calculations: 2023 NEC 220.82; EV equipment: 220.57 and 625.42. The worksheet assumes 240 V and does not calculate conductor or breaker sizes.
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