Calculation worksheet
Commercial lighting load
General lighting load from floor area and an applicable occupancy unit value.
Enter your values and select Calculate to see a step-by-step result.
Reference2023 NEC 220.42(A), Table 220.42(A)
The default 1.3 VA/ft² is for an office example. Select the correct occupancy and verify the adopted table. This is lighting only, not a complete feeder load.