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).

In this post, you’ll learn how to determine the right amount of wire that can safely go into different types and sizes of PVC conduit. And also the other conduit material.

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

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.

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.

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

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.

The pvc conduit fill chart is a table used to determine the maximum number of wires that can be safely installed in pvc conduit tubing based on the size of the conduit and the gauge of the wire.

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.

Maximum Number of Conductors In Conduit or Tubing: Type of Wire