导线尺寸选择器

Wire Gauge Calculator

Determine the minimum safe wire gauge in seconds. Just enter the voltage (V), current (A), wire length (ft/m), and allowable voltage drop (%), and the app will calculate the minimum wire gauge that meets both the voltage drop and current-carrying capacity requirements, and indicate which limiting factor determines the gauge.

New Features in This Version
• Support for IEC (mm²) standard - now alongside the NEC (AWG/kcmil) standard, switch with one click
• Current-carrying capacity check - determine the gauge based on current-carrying capacity (not just voltage drop)
• More accurate AC calculations - consider power factor, wire temperature, and reactance
• Include options for continuous loads (125%), insulation rating, and installation method

Features
• Results are displayed intuitively: AWG/kcmil, inches, millimeters, and square millimeters
• Wire materials: copper, aluminum, and steel
• Support for multiple parallel wires per phase
• Support for DC, single-phase AC, and three-phase AC (3-wire and 4-wire)
• Quick selection of common supply voltages + result sharing function

Applicable Scenarios
• Low-voltage DC - automotive, RV (recreational vehicle), solar systems
• Residential AC - single-phase 120 V / 230 V
• Industrial three-phase - 480 V (USA) / 400 V (EU)
• Long-distance power transmission

Be sure to verify the calculation results according to local elec...