Wire Size Calculator

Auto-select wire size from allowable current and voltage drop — free electrical engineering design tool

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Circuit Conditions

Circuit Type

Single-PhaseThree-Phase

Voltage (V)

Load Current (A)

Power Factor

Cable Length (m)

Max Voltage Drop (%)

Insulation Type

PVCXLPE

Installation Method

ConduitOpen Air

Recommended Wire Size

Selected Size

14mm²

Ampacity: 88A

Voltage Drop

3.69 V

(1.85%)

Limiting Factor

Voltage Drop

By Ampacity

2.6mm

By Voltage Drop

14mm²

Wire Size Ampacity Table

Voltage drop formula:

Single-phase: e = 2×ρ×L×I / A

Three-phase: e = √3×ρ×L×I×cosφ / A

ρ(copper) = 1/58 Ω·mm²/m