Electrical Load Schedule Calculator
The Load Schedule Calculator totals connected and demand load for a panel and sizes the feeder breaker. Example: for a 400 V 3-phase panel with 8 kW lighting and a 15 kW motor, Demand load = 30.5 kW, Demand = 30.95 kVA, Feeder breaker = 60 A (per PEC 2017 | NEC 2020 Art.220 + 430 | IEEE 141).
How it works
Computed from your inputs per PEC 2017 | NEC 2020 Art.220 + 430 | IEEE 141.
Worked example (Electrical & Power)
Inputs: a 400 V 3-phase panel with 8 kW lighting and a 15 kW motor.
| Result | Value |
|---|---|
| Demand load | 30.5 kW |
| Demand | 30.95 kVA |
| Feeder breaker | 60 A |
Computed live by WorkHive's calculation engine; standard: PEC 2017 | NEC 2020 Art.220 + 430 | IEEE 141.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 400 V 3-phase panel with 8 kW lighting and a 15 kW motor.
- The calculator returns Demand load, Demand, Feeder breaker, computed per PEC 2017 | NEC 2020 Art.220+430.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a electrical panel load schedule calculator?
The Electrical Load Schedule Calculator is a free online tool that computes ected and demand load for a panel and sizes the feeder breaker. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following PEC 2017 | NEC 2020 Art.220+430. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Electrical Load Schedule Calculator in WorkHive: free, no sign-up needed for the calculators.