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Both calculators run independently — change the inputs on either side to compare results.

Wire Gauge & Ampacity Calculator

Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs.

Current Load (A)

Wire Run Distance (ft)

System Voltage

Max Voltage Drop

Wire Material

Fill in the required fields to see your result.

Electrical

Short Circuit Current Calculator

Calculate the available short-circuit fault current at any point in a three-phase electrical system, accounting for transformer impedance and cable length. Use this for sizing breakers, fuses, and switchgear to meet NEC and ANSI interrupt ratings.

System Voltage

Transformer KVA (kVA)

Transformer Impedance (%)

Cable Length to Fault (ft)

Fill in the required fields to see your result.

Key differences

	Wire Gauge & Ampacity Calculator	Short Circuit Current Calculator
Category	Electrical	Electrical
Inputs required	5	4
Result	Minimum Wire Cross-Section (mm²)	Short Circuit Current (A)
What it does	Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs.	Calculate the available short-circuit fault current at any point in a three-phase electrical system, accounting for transformer impedance and cable length. Use this for sizing breakers, fuses, and switchgear to meet NEC and ANSI interrupt ratings.