HOME ELECTRICAL SYSTEM: HOW IT WORKS.
LIST OF LESSONS
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The electric power line (Theory)
The electric power line (Practice)
Turning on lamps (Theory)
Turning on lamps (Practice)
Lamps in parallel (Practice)
Lamps controlled from a single point: the SPST switch (Theory)
Lamps controlled from a single point: the SPST switch (Practice)
Two groups of lamps controlled from the same location (Theory)
Lamps controlled from two points: the SPDT switch (Theory)
Lamps controlled from two points: the SPDT switch (Practice)
SPDT switch used as SPST switch (Theory & Practice)
Lamps controlled from three locations: the intermediate switch (Theory)
Lamps controlled from three locations: the intermediate switch (Practice)
Lamps controlled from four or more locations: the intermediate switch (Theory)
Intermediate switch used as SPST or SPDT switch (Theory & Practice)
Protection devices and grounding system (Theory)
AC power plugs and sockets (Theory)
AC power plugs and sockets (Practice)
Push-button (Theory & Practice)
Relay (Theory)
Use of a relay for multiple control points (Theory)
Use of a relay to control two groups of lamps (Theory)
Use of a relay to control two groups of lamps (Practice)
Four-state relays and multiple control points (Theory)
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Read here before proceeding
How does the electrical system of our homes work?
How do those mysterious buttons and switches scattered around our rooms work?
What is the difference between a button and a switch?
How does the circuit that allows you to turn a lamp on and off from multiple points in a room work?
Why are three-way switches used in addition to “normal” switches?
My electrician says that a relay of the electrical system must be replaced; should I trust him?
These are just some of the questions we often ask ourselves about our electrical system.
And along with these doubts, others arise: is it really so complicated to understand the functioning of an electrical system? Is it really so difficult to make small changes on our electrical system or replace a faulty device? Is it possible to learn the main concepts of this field by working in total safety?
Well, here are our answers.
The electrical system of our homes is composed of a few very simple elements wired according to equally simple schemes that everyone would be able to understand.
Learning the basics of how an electrical system works not only is useful but it can become a very enjoyable hobby; it is stimulating and allows us to follow and understand our electrician when he operates on our electrical system.
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So why do few people know the operating principles of such a widespread system?
The main reason is the danger of electrocution. It is in fact the main obstacle that makes us fear the electrical system and blocks us whenever we decide to understand its way of operating.
In addition to this reason, another element that often intimidates us is the technical jargon used by the experts that confuses us and makes us believe that “the electrical system is not for us”.
This course is designed precisely for all those who find themselves in these considerations.
The course is based on a complete set of lessons dedicated to the operation of the main components of the home electrical system and the circuits that make use of them.
The devices and circuits will be analyzed first on a theoretical level. However, our course is not only theory it is much more.
This course has in fact dedicated sessions where you can safely experiment with different circuit solutions and real electrical components without necessarily having to work with dangerous voltage values.
We will use a battery-powered kit, also suitable for your children, in which it is possible to create the main circuits of the electrical system of our homes. All without any risk to things or people!
At this point you may be thinking that this is the usual toy, which you bought at Christmas for your children, consisting of two switches and a light bulb, so trivial that after half an hour it was already gathering dust in the basement!
This time you are wrong, certainly our kit is powered by batteries because we do not want you to run any risk, but we guarantee that it is composed of components actually used in electrical systems (two-three-way switches, buttons, relays, etc.) wired according to the schemes actually adopted in your homes. You can buy the kit components from many e-commerce websites or directly at electric stores, this to guarantee that you will use the real components used in the electrical systems of your homes.
The lessons will be presented in the usual practical but at the same time rigorous approach that characterizes the initiatives of the NPR Online team.
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