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Electrical, HVAC, Plumbing, or other field serviceElectrical Code Compliance3MediumElectrician$ implied

An electrician is unsure about correctly sizing transformer secondary conductors to avoid undersizing or needing to replace lugs.

No software tool exists that combines transformer sizing, conductor ampacity tables, and terminal lug ratings to quickly determine correct wire size and identify potential lug incompatibility.

Severity

3Medium

Willingness to Pay

implied

Added

Jun 9, 2026

Implied Software Gaps

Automated transformer secondary conductor sizing with NEC table lookup and lug compatibility check

App Concept

WireSize Pro

A mobile app that helps electricians quickly and correctly size conductors for transformers and other equipment. It integrates code tables, correction factors, and terminal rating limits, providing a compliance-ready answer in seconds.

Key Features

Input transformer kVA, primary/secondary voltage, and fuse size to auto-calculate required conductor ampacity
Display appropriate wire sizes from relevant NEC tables (including ACWU/THHN) with temperature correction
Flag when wire size exceeds available lug ratings and suggest alternatives (parallel runs, larger lugs, etc.)
Generate a summary report suitable for job documentation

Target Users: Licensed electricians and electrical contractors in residential, commercial, and industrial service across North America

Revenue Model: $14.99/mo subscription or $99/year

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