This PVC conduit fill table is used to determine how many THWN or THHN wires can be safely put into PVC conduit tubing. Each row going across is a different size of PVC conduit (Schedule 40 or 80).

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.

The NEC sets standards for the percent of volume that can safely be put into conduit. The below chart is from Table 1 in Chapter 9 of the National Electric Code.

Free PVC conduit fill calculator for Schedule 40 and Schedule 80. Calculate NEC-compliant fill percentages for PVC conduit installations instantly.

Dec 31, 2025 · This guide provides the complete PVC conduit fill charts you need, plus the underlying NEC rules that turn a simple table lookup into a code-compliant installation.

PVC Conduit Fill Chart Wire Conductor Size (THWN, THHN) 14 12 10 8 6 1Ú2 1/2 Inch Schedule 40 1/2 Inch Schedule 80 11

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.

One of the critical aspects of designing and installing an electrical system is calculating the conduit fill, especially when working with PVC conduit. This is where a PVC Conduit Fill Calculator becomes an …

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.

Aug 12, 2025 · Download Free PDF & Excel Conduit fill chart: NEC-accurate field tables for EMT, PVC, RMC, IMC, flex & HDPE.