The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors.

Our NEC Conduit Fill Chart calculates THWN and THHN wire fill for EMT, IMT, rigid metal, or flexible metal conduit pipe using conduit trade size and AWG or MCM wire size.

CONDUIT FILL TABLES – NEC TABLE C CONDUCTOR SIZE – AWG / kcmil – THHN / THWN SIZE 14 12 10 8

The following is a typical conduit fill chart, which shows data for different types of conduit such as EMT conduit, IMC conduit, and GRC conduit. The possible wire gauges go from 14 AWG to 750 MCM, …

Aug 2, 2025 · Discover NEC-compliant conduit fill charts for EMT, IMC, Rigid, and Flexible Metal Conduits. Downloadable tables, size-by-size breakdowns, and manufacturer-supplied resources for …

Oct 27, 2025 · Master conduit fill calculations with our complete NEC guide including fill charts, wire capacity tables, and step-by-step examples. Learn proper conduit sizing for electrical installations.

Calculate conduit fill percentages and find the right conduit sizing per NEC Chapter 9 requirements. Works with EMT, PVC, and RMC conduits with accurate wire area calculations for safe installations.

Professional NEC Chapter 9 conduit fill calculator implementing Table 1 fill percentages, Table 4 conduit areas, and Table 5 conductor dimensions. Essential for code-compliant raceway sizing and wire …

Aug 12, 2025 · When you’re planning or reviewing a raceway run, nothing beats a conduit fill chart. It turns code percentages into clear, ready-to-use numbers— no calculator required. This guide …

Jan 1, 2026 · Our conduit fill calculator 2026 implements NEC Chapter 9 Table 4 standards with 2026 updates to ensure accurate wire capacity calculations for all major conduit types used in residential, …