Tap Conductors in Canadian Electrical Design
Tap rules let you use a smaller conductor than the upstream feeder when specific relationships among length, protection, and ampacity are satisfied. A CEC tap conductor calculator helps you keep those relationships straight instead of sketching them from memory on the tailgate. The goal is defensible sizing when you branch from a large feeder to a localized load.
Note: This page provides general educational information only and does not interpret the Canadian Electrical Code or any legally adopted standard. Always consult the authority having jurisdiction for official requirements.
Short taps and protection
Common Canadian designs reference short tap lengths such as 3 m and 7.5 m scenarios. The details of which rule applies depend on the installation pattern, upstream overcurrent, and how the tap is protected. Always align device ratings with the approved design.
Where the calculator fits
Structured tools reduce arithmetic mistakes and make it easier to attach a PDF to the job file. Start from the tap conductor calculator overview and connect back to ampacity when you need parallel checks.
Run tap checks in Current
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