ConduitFill 3.0

ConduitFill helps electricians, engineers, and inspectors determine the correct conduit trade size quickly and accurately—directly from your iPhone or iPad. Designed for real-world use in the field, the app lets you select up to five wire sizes per conduit and instantly returns the minimum trade size required under the 2023 National Electrical Code® (NEC). Whether you're wiring a commercial panel, laying underground feeders, or teaching electrical code compliance, ConduitFill simplifies conduit fill calculations like never before.