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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 of this section. (2 pages, 274 KB)
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Click on the image above to watch the video
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So how can you find the area of a circle for the purpose of calculating raceway fill? Maybe you’re asking yourself, “why would I need to know how to calculate the area of a circle when the NEC provides tables containing values for the area of conductors and fill space of raceways?”
Remember that not all cables and conductors are included in these tables and you may be mixing conductors of different sizes which requires you to do the calculations. If you’re like most, it has probably been a while since you’ve been in a geometry class, so take a few minutes to read the text and watch the video where Mike and the team discuss how to calculate the area of a circle.
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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