Conduit Sizes

Note: If you are only pulling , you can fill up to 53% . For two wires , the limit is 31% . Pro Tips for Sizing

Conduit sizing is determined by trade name, not true measurement. Proper selection requires identifying wire types, counting conductors, calculating fill area per NEC, and selecting the appropriate conduit type (EMT, RMC, PVC) and trade size that provides adequate internal space. Using undersized conduits risks wire damage, overheating, and code violations; oversized conduits add unnecessary cost. Always refer to NEC Chapter 9 tables for precise area values. conduit sizes

If a 1/2-inch conduit is "just enough," consider moving to 3/4-inch. The cost difference is minimal, but it makes pulling wires significantly easier and allows for future upgrades. Note: If you are only pulling , you can fill up to 53%

In the United States, conduit sizes are defined in inches. Common trade sizes include: If a 1/2-inch conduit is "just enough," consider