Motor Conductor Sizing — Most Electricians Get This WRONG
Motor conductor sizing is one of the most misunderstood calculations in the NEC—especially when temperature comes into play.
In this video, Paul from Electrical Code Academy walks through how to properly size branch-circuit conductors for a continuous-duty motor, including how elevated ambient temperatures like 115°F impact ampacity and final conductor selection.
This is where many electricians make mistakes—failing to correctly apply temperature correction factors and NEC requirements can lead to undersized conductors and code violations.
You’ll learn a clear, step-by-step method for handling motor calculations so you can confidently size conductors for real-world installations and electrical exams.
If motor calculations have ever confused you, this breakdown will make it click.
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⚡ WHAT YOU’LL LEARN
How to size motor conductors correctly
Continuous-duty motor rules
Temperature correction factors
How 115°F affects ampacity
Common mistakes electricians make
🏷️ HASHTAGS
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