|
The year 2020 provided me with the unique opportunity and the time to produce a series of videos on topics that you told me were of interest to you. I recorded them from my house, and livestreamed them over the course of several months. There were a lot of you that might not have been able to tune in, and others who did, but would enjoy the chance to see them again. We'll be sending them out monthly in a newsletter series. Enjoy and feel free to share!
| Understanding System Voltages |
| |
|
|
|
Click on the image above to watch the video
[46min:28sec]
|
The system voltage that we’re probably most familiar with is the typical 120/240V single-phase electrical service to a residential occupancy. But there are many occupancies that have different electrical requirements such as higher nominal voltages. What exactly are the other common system voltages and where do these higher voltages such as 277/480V come from? What about single-phase vs. three-phase voltage requirements and how come in three-phase the voltage is normally 120/208V? Just how is electricity “transformed” to meet specific electrical needs?
To really understand system voltages, watch this video where we’ll explain not only the theory behind system voltages but also some of the safety grounding and bonding considerations and what consequences might happen if we don’t follow NEC requirements surrounding separately derived systems.
|
|
|
• • •
|
| We'd
love to hear from you about this series, and the ways you're using it. Send us your comments and feedback by clicking on "Post a Comment"
below. Look out for the next part in this series and
please share with your colleagues. |
This content is extracted from Mike Holt's Understanding the National Electrical Code, Volume 2, textbook, based on the 2020 NEC Program.
|
|
