What is the disclaimer for this calculator?

Question

Accepted Answer

This calculator provides estimates based on NEC 2020 standards. The core data tables for ampacity and conduit fill are largely consistent across the 2017, 2020, and 2023 editions for the calculations performed here. Assumes 75°C conductor terminals, standard ambient temperature (30°C), and no more than 3 current-carrying conductors per raceway for base ampacity before paralleling. Does not account for all derating factors (e.g., high ambient temp, >3 CCC in one conduit after paralleling adjustments), continuous load factors (125% unless otherwise noted), or specific installation conditions. Voltage drop is an estimate based on approximate impedance values (NEC Ch9, T9 @ 0.85 PF) and calculated at 80% of the input amperage per set unless noted otherwise. Parallel run calculations require verification that all NEC paralleling requirements (e.g., same length, material, size, insulation, termination) are met. Always consult the current National Electrical Code, local regulations, and manufacturer specifications. Verify all calculations with a qualified professional before installation.

What's New in v1.2

FeederCalc

What's New in v1.2

FeederCalc

Load & Circuit Details

Conductor & Raceway Selections

Sizing Constraints (Optional)

Important Disclaimer