Load Calculator Demo

Try a Load Calc for a service or feeder -- connected load, demand factor, voltage, phase, and power factor. No signup required.

Calculation Metadata

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Calculation Name Optional for live results and save.

Inputs

Method: connected load times demand factor gives demand kW; service current is I = (Demand kW * 1000) / (V * PF) for single-phase, or / (V * sqrt(3) * PF) for three-phase. The full calculator supports NEC Article 220 load categories, largest-motor uplift, and branded PDF / XLSX export.

Load

Connected load (kW) Demand factor (0-1)

System

System voltage (V) Phase configuration Power factor (0.5-1.0)

Results

Connected load 150.0kW

Demand load 127.5kW

Service current 170.4A

System voltage 480.0V

Math window

Compute demand load: Demand kW = 150.0 * 0.85 = 127.5
Compute service current: I = (127.5 * 1000) / (480.0 * sqrt(3) * 0.9) = 170.4

Need NEC Article 220 load categories and stamped PDF export?

The full ElectraCalcIQ Load Calculator supports itemised NEC Article 220 categories, largest-motor uplift, saved projects, and branded PDF / XLSX export for stamped submittals.

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Math Window

Formulas

Demand load

Demand kW = Connected kW * Demand Factor

Units: kW

Service current

I = (Demand kW * 1000) / (V * sqrt(3) * PF)

Units: A

Power factor assumption
```
Power factor (PF) = 0.9.
```

Ordered Steps

Compute demand load
```
Demand kW = 150.0 * 0.85
```
Result: 127.5

Units: kW

Compute service current

I = (127.5 * 1000) / (480.0 * sqrt(3) * 0.9)

Result: 170.4

Units: A

Engineering Use Notice

Calculator outputs are provided as engineering support and workflow aid. They do not replace licensed professional judgment, project-specific design review, or code-required responsibility.

See full details in the Engineering Disclaimer.