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What a lot of people don't realize is that the foundation for understanding the NEC rules for electrical installations is electrical theory! Whether you're a first-year apprentice still struggling to understand the difference between a volt or ampere, or a veteran electrician trying to sharpen your troubleshooting skills, this product has something for you.
We're sharing this clip from the program to introduce you to the importance of this topic. Please feel free to share this with your friends and co-workers, and for more videos and content on this topic, check out our Electrical Theory Video Library that includes the full program and digital textbook.
The content below is extracted from Mike Holt's Understanding Electrical Theory for NEC Applications textbook.
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Click here or on the thumbnail to the left to view or download the PDF. (2 pages, 1,073 KB)
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Click on the image above to watch the video
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In the electrical industry we frequently reference different system voltages such as 120/240 and 480Y/277. These voltages are known as the “nominal” voltage and are important both for calculations and the selection of equipment that is used in an electrical system. Rules like 220.5(A) of the NEC indicate that they are the voltage values to be used for performing electrical calculations and manufacturers specify that equipment be connected to a specific nominal system voltage so it can operate properly.
Curious to learn more? Review the attached text then join Mike and the team on the video as they discuss this topic.
Click on the image to the right to watch the video and be sure to download the PDF to follow along.
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For more information on this topic, get a copy of Mike Holt's Understanding Electrical Theory video program and textbook.
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