FIG. 00 — IN PROGRESS
VOLTAGE DROP CALCULATOR
Compute one-way and round-trip voltage drop for copper or aluminum conductors at any length, load, and system voltage.
⚠ STATUS · TOOL UNDER FINAL VALIDATION
We're finalizing this calculator's NEC validation. In the meantime, use the conduit fill calculator and the wire fill chart on the homepage.
FIG. 01
WHAT THIS TOOL WILL CALCULATE
- 01Inputs: phase (1Φ / 3Φ), source voltage, conductor material, AWG, load current, one-way length, power factor.
- 02Outputs: voltage drop in volts, voltage drop as a % of source, NEC informational guideline pass/fail (3% branch, 5% combined).
- 03Optionally suggests the smallest upsized gauge to bring the drop within the guideline.
- 04Pairs with the wire fill chart — upsized conductors need a recheck against your conduit fill.