NM & NMC cable – 334

Explore the permitted and prohibited uses of NM and NMC cables, focusing on installation environments, protection requirements, and compliance with NEC Article 334.

Last updated November 20, 2024
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About the video

This lesson provides an in-depth look at NM (Romex) and NMC cables, detailing their permitted uses in various residential and commercial environments per NEC Article 334. It covers installation requirements, including the need for protection from physical damage and specific scenarios where these cables can or cannot be used. You’ll learn about the importance of using proper grommets and bushings to prevent damage, as well as the ampacity ratings and how to ensure safe and compliant electrical installations in dry, wet, and corrosive environments. To get started, go to the Lesson Content tab and click on the video.

About the quiz

Each lesson contains a video, and is followed up with a simple quiz. Quizzes review information discussed within the video, with each question providing an answer justification. Helping to reinforce correct answers and helps clarify any mistakes through code citations, excerpts, and explanations, so you can better understand the material.

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