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Determines the minimum AWG (American Wire Gauge) conductor size for a given current, voltage, one-way cable distance, and maximum allowable voltage drop percentage. Supports copper and aluminum conductors. Computes round-trip resistance, actual voltage drop in volts and percent, and wire cross-sectional area. Essential for DC solar runs, battery bank wiring, EV charging circuits, and low-voltage landscape lighting. NEC recommends 3% max drop for branch circuits and 5% total including feeder. Outputs the smallest AWG that satisfies the drop constraint.

post/api/wire_gauge

Request

  • Base URL: https://calc.engineer
  • URL: https://calc.engineer/api/wire_gauge
  • Auth: none declared

Request body

current_ampsnumber required

Load current in amperes (A)

voltagenumber required

System voltage (V)

distance_mnumber required

One-way conductor distance in meters

max_drop_pctnumber

Maximum allowable voltage drop as percentage (default 3%)

conductor'copper' | 'aluminum'

Conductor material: copper or aluminum

Response

Computed result for wire_gauge

toolstring required
versionstring required
computed_atstring date-time required

Changes

No recorded changes to this operation across all 1 revision of this API.