Let’s open up a transformer and dig through it to see how they work. Transformers are extremely useful devices used in electrical systems to raise and lower voltage. They’re also used for isolation, typically in cleaning up power. They only exist in the world of Alternating Current however, so in DC circuits you won’t find transformers used.
Punching down and testing cat5 cables is something that a lot of people struggle with understanding so today I’m going to talk about what the various category cables are, how to decide if you need A or B configuration, and how to check your terminations with a tester when you’re done.
This video covers everything you need to know about working with EMT (electrical metallic tubing) as an electrician. I cover the topics discussed in the national electric code article 358 on uses permitted, securing and supporting, and much more. This video is more of a code-overview of EMT, so let’s begin at the beginning of article 358 of the NEC with the uses permitted and not-permitted.
In this episode we talk in depth about how to wire with MC cable, what the uses permitted and uses NOT permitted are, as well as securing and strapping and a whole host of other tips for use.
Contactors are heavy-duty electromagnetic switches that are normally used in controlling large lighting loads and motors. They operate similar to relays, but often times deal with more voltage, higher amperage, and have more input and output options.
The Kelvin Scale is used to talk about color of objects at certain temperatures, whereas other temperature scales deal with actual heat or thermal temperature. Kelvin is used in lighting especially for that reason, to talk about the color of light emission.
A relay is a type of electromagnetic switch, similar to a contactor, that can be controlled remotely with electricity, rather than needing manual input as a standard switch would.
There are so many different types of lamps out there that having an understanding of the “lamp families” helps you understand how to troubleshoot them easier. Let’s dive in.
A lot of people get really confused by contactors and relays and tend to treat them like some kind of mystical magic device without understanding what exactly they do. They have some similarities but still have very distinct differences.