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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, 350 KB)
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Click on the image above to watch the video
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Resistance, current, and voltage are all words we use in the trade. Have you ever wondered what they are and how they relate to each other?
The answer is contained in a formula we call Ohm's Law, E = I x R which is the basis for electrical calculations. The math in Ohm's Law shows the relationship between electromotive force in volts (E), intensity in amperes (I), and resistance in ohms (R) through an electrical circuit.
Please take a few minutes to read the text and watch the video as Mike and the team help you to understand this relationship as they explain Ohm's Law.
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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