Electrical Load Schedule Calculator
Static · formula-only · worked example computed when this page was built · no live data
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 = 26.75 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. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
Worked example (Electrical & Power)
Inputs: a 400 V 3-phase panel with 8 kW lighting and a 15 kW motor.
| Result | Value |
|---|---|
| Demand load | 26.75 kW |
| Demand | 30.95 kVA |
| Feeder breaker | 60 A |
Computed by WorkHive's calculation engine when this page was built; standard: PEC 2017 | NEC 2020 Art.220 + 430 | IEEE 141.
How to use this calculator
- Read the worked example. It uses a 400 V 3-phase panel with 8 kW lighting and a 15 kW motor and shows every number in the method.
- Follow the formula with your own figures: it returns Demand load, Demand, Feeder breaker, computed per PEC 2017 | NEC 2020 Art.220+430.
- To compute interactively, open the Electrical Load Schedule Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is an electrical panel load schedule calculator?
The Electrical Load Schedule Calculator is a free online tool that totals connected 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 is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). 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, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.