Conduit fill and conduit sizing with the latest USA & Canadian electrical code.

The Conduit Filler is designed to help electrical tradespeople with their conduit fill calculations and with conduit sizing for various gage of wires. Select the conduit type, conduit size and wire type you are using to find out the maximum number of allowable conductors. For conduit sizing, simply select the conduit type, wire type and add the amount of wires for each gage. All calculations are done in accordance with the 2023 USA National Electrical Code and the 2021 Canadian Electrical Code.

What's New in the Latest Version 1.0

Last updated on Dec 19, 2023

More conductor added to NEC and CEC. Bug fixes.

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