All right, so I'm headed to Haiti to teach out of this book. This is the book in Haitian and it's all about electrical basics, for young adults to teach them some basic electrical knowledge. So that way, they can hopefully prepare to go out and get good careers and help their country out. This is an english-language version of it that I have, and I wanted to just do a quick video while I'm gone just, do a series of these that you guys can watch while I'm away that's the basically the stuff I'm gon na be teaching in Haiti.

Really basic concepts, but things that HVAC professionals, especially those who are new to the trade or maybe those who never had a formal education today, we're gon na show just the basic electrical circuit and really everything that we do in electrical diagnosis and wiring up circuits comes Down to this really basic principle, and that is that we have a power supply, we have a switch and we have a load and a load is the part that does whatever it is we're wanting to do. It's the part that actually converts electromotive force, something that we want to accomplish, whether it's light or heat or weather. In this case it is a motors. All I'm gon na do here is just show you the basics here, so we've got a power supply.

You see it's a circuit, we're gon na wear up a circle out of one side into the other, so I'm gon na use this switch here. This is actually a double pole. Double throw switch kind of similar to a 9340 relay for those views. You use one of those it can go in either direction.

Okay, so now we're wired out of a power supply and we're gon na make a circuit through a load through a switch and then back the other way or if you like, we could say we're going. This direction, but truthfully it's - and this is sort of an interesting thing - is that electrons are actually stored on the negative side of a battery. So in reality it's actually going. This direction, which is often a cause of confusion, really doesn't matter that much with a DC motor.

You will notice that it does operate in opposite directions if I changed polarity, but let's go ahead and show how it works. So what we're gon na do is right. Now the path is open from here to here and as soon as I make this circuit, so as soon as I close this switch now, my little motor is spinning away, and this little guy is really going. I'm actually always quite impressed by how well that works.

So that is a closed circuit as soon as I open the circuit now the load stops operating because now we no longer have a path. A lot of people will say: electricity goes to ground and this kind of proves that we've got no ground here. We've just got a battery and it just goes from one side to the other, and that's really how electricity flows. It goes from one side of the power supply to the other side of the power supply, whether you're working with 240 volts 120 volts, 24 volts and 9 volts, and what you're working on that's really.

What you're trying to do is create a circuit from one side to the other through a switch and then through the load in in and out of the switch in and out of the load and then back to the C power supply. So that's it. That is the basic electrical circuit power supply, load, switch, switch, turns on and off, read, averts passes, power, power supply, provides the electro-motive force or the potential difference, and the load is the thing that does whatever we're trying to accomplish whether that's motion via magnetism light or Heat thanks for watching.