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Single and 3-Phase electrical circuit basics A to Z

Name: Single and 3-Phase electrical circuit basics A to Z
Rating: 4.5 (1635 reviews)

AC / DC Explained, Single / Three-Phase motor circuits, Test Equipment, House Wiring, Ohm's law and fault finding.

Bestseller

Created byJohanna Christina Hälbich

Last updated 9/2023

English

What you'll learn

Fundamentals of electricity / Electrical Circuit basics (Conductors/Insulators, Open/Closed Circuits, Series/Parallel Circuits).
Voltage, Current, Resistance, Power, and Energy explained in a manner that can be visualized.
Direct Current and Alternating Current explained with oscilloscope graph examples.
Frequency, Peak values, Peak-to-Peak values and RMS values explained with example of basic calculations for each type of measurement.
Alternating Current power generation explained (Alternators, Power Stations, Transformers, Long Distance Transmission).
Electrical Transformers explained (Step-Up / Step-Down Transformers, Single / Three-Phase Transformers).
Ohm's Law Triangle and Wheel explained with examples.
Ohm's Law applied to five different scenarios (1. Matched Load and Supply / 2. Over-Current / 3. Under-Current / 4. Under-Voltage / 5. Over-Voltage).
Power Supplies and Loads in Series explained.
Power Supplies and Loads in Parallel explained.
Capacitors and Capacitance explained.
Inductors and Inductance explained.
Capacitive and Inductive Reactance explained (Simplified).
Impedance explained (Simplified).
Single / Three-Phase transmission explained with Wye / Delta examples.
Three-phase voltage potentials explained.
Electrocution, Protective Earth and other safety components explained.
Single / Three-phase circuit layouts explained.
Earthing systems explained (TN-C, TN-CS, TN-S, TT, IT).
Multimeters and how to use them (Layout, AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Display Count, Accuracy, Category ratings).
Clamp Meters and how to use them (Layout, AC/DC Current).
Insulation Resistance Testers and how to use them (Layout, Normal Resistance, Insulation Resistance Testing, Capacitance Discharge, AC Voltage measurements).
PSC/Loop Testers and how to use them (Testing Loop Impedance, Testing Prospective Short-Circuit Current, Calculating Prospective Fault Current).
Earth Resistance Testers and how to use them (Layout, Testing The Earth Resistance).
Phase Rotation Testers and how to use them (How to determine phase rotation).
ELCB/Polarity Testers and how to use them (Testing the Earth Leakage trip current, Socket outlet polarity testing).
Three-Phase motors explained (Wye / Delta configurations).
Three-Phase motor and control circuits explained with several upgrades.
Star/Delta starters explained (How to start a Three-Phase motor in two mild stages, instead of a single but more aggressive startup).
Single / Three-Phase motor inspections explained (External and Internal).
Fault Finding procedures and circuit inspection.
House hold wiring basics.

Course content

8 sections • 108 lectures • 4h 27m total length

Introduction1:54
An introduction and quick overview of Single And Three-Phase Electrical Circuit Basics.

1. An introduction to electricity.2:20
Electricity explained from the perspective of an electrician.
2. Conductors.2:31
In this video we will look at materials that conduct electricity.
3. Insulators.1:47
In this video we will look at insulators, and we will learn what insulators are used for.
4. What is an electrical circuit?2:49
In this video we will learn how current flows through an electrical circuit, what a closed or open circuit refers to, and why we still use the model of conventional current.
5. Electrical Circuit Basics Quiz.
6. Voltage.1:49
In this video we will learn what Voltage potential refers to.
7. Current.3:15
In this video we will learn what Current refers to, and how to calculate current capacity.
8. Resistance.6:27
Most people have an inverse perception of how resistance in an electrical circuit works. In this video we will learn what electrical resistance refers to, and we will rectify a common misconception. We will also look at an example of a short-circuit.
9. Power.3:35
In this video we will learn what power refers to, why we transmit electricity at very high voltages, and why a High-Voltage or a High-Current power supply is not necessarily a powerful power supply.
10. Energy.4:21
In this video we will learn what energy refers to, and why energy, power and current capacity are three different things.
11. Electrical Circuit Basics Quiz.
12. Power supplies in series.1:51
In this video we will look at what happens if we connect two of the same Power Supplies in series. We will have a detailed look at series and parallel connections a bit later.
13. Loads in series.1:08
In this video we will look at what happens if we connect two of the same Loads in series. We will have a detailed look at series and parallel connections a bit later.
14. Power supplies in parallel.0:48
In this video we will look at what happens if we connect two of the same Power Supplies in parallel. We will have a detailed look at series and parallel connections a bit later.
15. Loads in parallel.1:09
In this video we will look at what happens if we connect two of the same Loads in parallel. We will have a detailed look at series and parallel connections a bit later.
16. Symbols and Unit Abbreviations.3:42
In this video we will look at symbols, unit abbreviations, and units of measurement.
17. Electrical Circuit Basics Quiz.

1. Oscilloscope graph.1:14
In this video we will learn how to read an oscilloscope graph.
2. Direct Current.1:47
In this video we will look at what Direct Current looks like on an Oscilloscope.
3. Alternating Current.4:06
In this video we will look at what Alternating Current looks like on an Oscilloscope. We will also look at an example of a purely resistive AC circuit, Capacitive AC Circuit and an Inductive AC Circuit.
4. AC and DC electricity quick quiz.
5. AC Frequency.4:02
In this video we will look at how to calculate the frequency of an AC circuit.
6. AC Peak values.2:51
In this video we will look at what the Peak Values in an AC circuit refers to.
7. AC Peak-to-Peak values.2:05
In this video we will look at what the Peak to Peak Values in an AC circuit refers to.
8. AC RMS values. (SHORTCUT METHOD)2:46
In this video we will look at what RMS values in an AC Circuit refers to. We will also look at a very easy method to calculate the RMS value of an AC waveform.
9. AC RMS values. (RMS METHOD)3:17
In this video we are going to look at a longer but more accurate method to calculate the True RMS values of an AC waveform.
10. AC Waveform quick quiz.
11. Step-Up and Step-Down transformers.1:40
In this video we are going to look at an analogy that will make it easier for us to understand what a step-up or step-down transformer does.
12. Electromagnetism.1:41
In this video we are going to look at what happens around a conductor if we pass Direct Current or Alternating Current through it. We will also learn what an electromagnet is.
13. Single-Phase Alternators.2:22
In this video we are going to look at how we can generate single-phase Alternating Current.
14. Single-Phase Transformers.5:05
In this video we are going to look at how single-phase transformers work, why electrical transformers only work with Alternating Current, why we use transformers, and how to calculate the output voltage / current of a step-up or step-down transformer.
15. Electrical Transformer quick quiz.
16. Ohms Law Part 1. (Triangle Formulas)3:57
In this video we will look at how we can use the Ohm's Law triangle to make quick electrical calculations for electrical circuits.
17. Ohms Law Part 2. (Example of matched load and supply)0:43
In this video we are going to use the Ohms's Law example from our previous video to match the power supply with the load that is connected to it.
18. Ohms Law Part 3. (Example of high current)1:23
In this video we are going to use Ohm's law to predict the outcome of an electrical circuit, in which the load is supplied with more current than what the load requires.
19. Ohms Law Part 4. (Example of low current)1:47
In this video we are going to use Ohm's law to predict the outcome of an electrical circuit, in which the load is supplied with less current than what the load requires.
20. Ohms Law Part 5. (Example of low voltage)1:16
In this video we are going to use Ohm's law to predict the outcome of an electrical circuit, in which the load is supplied with less voltage pressure than what the load requires.
21. Ohms Law Part 6. (Example of high voltage)1:52
In this video we are going to use Ohm's law to predict the outcome of an electrical circuit, in which the load is supplied with more voltage pressure than what the load requires.
22. Ohms Law Part 7. (Wheel Formulas)2:13
In this video we are going to look at how to use the Ohm's Law wheel to do quick electrical calculations for electrical circuits.
23. Ohm's Law quiz.
24. Power supplies in series calculations.1:27
In this video we will learn what happens if we connect two of the same power supplies in series, and why the electrical circuit behaves the way that it does.
25. Power supplies in parallel calculations.1:27
In this video we will learn what happens if we connect two of the same power supplies in parallel, and why the electrical circuit behaves the way that it does. We will also look at an example of how to calculate the total current capacity, constant current output and battery run time.
26. Loads in series calculations.1:12
In this video we will look at how to calculate the resistance of an electrical circuit if we connect loads in series, and why the electrical circuit behaves the way it does in this configuration.
27. Loads in parallel calculations.0:39
In this video we will look at how to calculate the resistance of an electrical circuit if we connect loads in parallel, and why the electrical circuit behaves the way it does in this configuration.
28. Loads in series and parallel calculations.1:04
In this video we are going to look at how to calculate the resistance of an electrical circuit with loads that are connected in both series and parallel.
29. Series / Parallel quick quiz
30. Ohms Law for AC circuits.1:51
In this video we are going to look at how to apply a Purely Resistive AC circuit to Ohm's Law, what RMS Wattage refers to, and why we cannot apply an AC circuit with Capacitive or inductive properties to Ohm's Law in the same way that we would do with a DC circuit or a purely resistive AC circuit.
31. Capacitors and capacitance.2:15
In this video we will learn what a capacitor and capacitance is, and why our electrical grids also have capacitive properties.
32. Capacitive reactance.2:18
In this video we will look at a simplified example of how capacitance in an AC circuit can cause capacitive reactance in an AC circuit.
33. Inductors and Inductance.1:38
In this video we will learn what an inductor and inductance is, and why our electrical grids also have inductive properties.
34. Inductive Reactance.1:23
In this video we will look at a simplified example of how inductance in an AC circuit can cause inductive reactance in an AC circuit.
35. Impedance.2:28
In this video we will learn why we refer to the resistance in an AC circuit as the Impedance, and what Impedance refers to.

1. Types of power stations.2:21
In this video we will look at how the different types of power stations generate AC electricity.
2. Single-Phase transmission.3:03
In this video we will look at what a single-phase long distance transmission system would look like if it existed. As far as I know, this system does not exist anymore because it is a very expensive method to transmit electricity. But it will make it easier for us to understand how three phase electricity works and why we transmit three-phase electricity instead of single-phase electricity.
3. Three-Phase transmission. (Wye)4:49
In this video we will learn how it is possible to transmit three phase electricity by only using three long distance conductors, why three phase electricity is better and cheaper, and what a WYE system looks like. We will also cover three-phase transformers.
4. Three-Phase voltage potentials.6:32
In this video we will look at three phase voltage potentials between different connection points.
5. Three-Phase transmission (Wye)
6. Three-Phase transmission. (Delta)2:01
In this video we will learn how a three-phase delta system works.
7. Three-Phase Delta High-Leg.2:02
In this video we will learn how it is possible to get 120, 240 and 208 volts from a single transformer.
8. Three-Phase Delta Quiz

1. Electrocution.4:23
In this video we will learn how electrocution works and what we can do to prevent electrocution.
2. Electrocution quiz
3. Single-Phase supply circuit layout.9:16
In this video we will look at how a typical single-phase circuit is laid out, how an RCD can prevent accidents, how a CB can prevent fires, and why we earth some electrical appliances.
4. Three-Phase supply circuit layout.1:21
In this video we will look at how a typical three-phase circuit is laid out and why some electrical installations are allowed to bypass the RCD in some countries.
5. Intermediate Light Switch circuit.2:30
In this video we will learn how to control a single light using multiple switches.
6. Single-Phase Energy meters.2:02
In this video we will learn how to connect a single-phase energy meter.
7. Three-Phase Energy meters.1:31
In this video we will learn how to connect energy meters to a three-phase supply.
8. TN-C Earthing system.3:51
In this video we will learn how the TN-C earthing system works.
9. TN-C-S Earthing system.0:47
In this video we will learn how the TN-C-S earthing system works.
10. TN-S Earthing system.0:58
In this video we will learn how the TN-S earthing system works.
11. TT Earthing system.1:02
In this video we will learn how the TT earthing system works.
12. IT Earthing system.1:54
In this video we will learn how the IT earthing system works.

1. Multimeter – Layout and design.6:41
In this video we will look at the layout and design of multimeters.
2. Multimeter - Leads.3:22
In this video we will look at the leads and category ratings of multimeters.
3. Multimeter - Display count.2:40
In this video we will learn what multimeter display count refers to.
4. Multimeter - Accuracy.1:13
In this video we will learn how multimeter accuracy works.
5. Multimeter - Resistance measurements.4:48
In this video we will learn how to measure resistance.
6. Multimeter - Continuity buzzer.1:24
In this video we will learn how the continuity buzzer feature on a multimeter works.
7. Multimeter - AC and DC voltage measurements.2:08
In this video we will learn how to measure AC or DC voltage.
8. Multimeter - AC and DC current measurement.2:42
In this video we will learn how to measure AC or DC Current.
9. Multimeter - Capacitance measurements.1:58
In this video we will learn how to measure Capacitance.
10. Multimeter - Frequency measurements.0:37
In this video we will learn how to measure AC frequency.
11. Clamp Meter - Layout and design.0:44
In this video we are going to look at the layout and design of clamp meters.
12. Clamp Meter - AC and DC current measurements.0:48
In this video we will learn how to use a clamp meter to measure AC or DC current.
13. Insulation Resistance Tester - Layout and design.3:10
In this video we will look at the layout and design of an analog insulation resistance tester.
14. Insulation Resistance Tester – Normal resistance measurements.1:18
In this video we will learn how to measure normal resistance using an Insulation Resistance Tester.
15. Insulation Resistance Tester – Insulation Resistance Measurements.4:30
In this video we will learn how to measure insulation resistance.
16. Insulation Resistance Tester – AC Voltage measurements.0:28
In this video we will learn how to measure AC voltage using an analog insulation resistance tester.
17. Insulation Resistance Tester - Capacitance discharge feature.0:26
In this video we will learn how to discharge capacitive buildup using an analog insulation resistance tester.
18. PSC / Loop Tester - Layout and design.2:05
In this video we are going to look at the layout and design of an PSC / Loop Tester.
19. PSC / Loop Tester – Loop Impedance measurements.4:32
In this video we are going to learn how to measure External or System Loop Impedance.
20. PSC / Loop Tester – Calculating Prospective Fault Current.0:35
In this video we will learn how to calculate the Prospective Fault Current.
21. PSC / Loop Tester – Prospective Short-Circuit Current measurements.2:38
In this video we will learn how to measure Prospective Short-Circuit current.
22. Earth Resistance Tester - Layout and design.3:56
In this video we will look at the layout and design of an earth resistance tester.
23. Earth Resistance Tester – Earth Resistance Measurements.2:00
In this video we will learn how to measure earth resistance.
24. Phase rotation tester.1:28
In this video we will learn how to determine the phase rotation of a three-phase power supply.
25. ELCB/Polarity Tester. – Earth Leakage sensitivity.1:57
In this video we are going to learn how to measure the trip current of an installation.
26. ELCB/Polarity Tester. – Polarity testing.0:51
In this video we are going to learn how to use a polarity tester to make sure that a socket outlet is installed correctly.
Electrical test equipment quiz.

1. Three-Phase motors explained.4:50
In this video we will learn how three-phase motors work and how to match them to a three-phase power supply.
2. Three-Phase motor-Wye configuration.2:36
In this video we will learn how to configure a three-phase motor in a WYE/STAR configuration.
3. Three-Phase motor-Delta configuration.1:38
In this video we will learn how to configure a three-phase motor in a Delta configuration.
4. Three-Phase motor circuit.4:23
In this video we will build a three-phase motor circuit.
5. Motor control circuit.4:10
In this video we will build the SINGLE-PHASE control circuit for our three-phase motor circuit.
6. Three-Phase motor / control circuit, Forward / Reverse upgrade.2:19
In this video we are going to upgrade our motor and control circuit so that it can also run in reverse.
7. Control circuit indicator lights upgrade.1:25
In this video we are going to install an indicator light panel to our control circuit.
8. Current and Voltage gauges upgrade.1:33
In this video we are going to install current gauges to our motor circuit, and voltage gauges to both our control and motor circuits.
9. Circuit layout SIMPLIFIED.0:42
In this video we are going to simplify the layout of our three-phase motor and control circuit.
10. Star-Delta Starter upgrade PART 1.3:09
In this video we will learn what a STAR-DELTA starter is and why we would use it.
11. Star-Delta Starter Upgrade PART 2.2:24
In this video we will learn how a Star-Delta starter can run a three-phase motor in both Wye and Delta configurations.
12. Star-Delta Starter upgrade PART 3.2:02
In this video we will look at how the Star-Delta control circuit works.
13. Three-phase motor external inspection.1:05
In this video we will learn how to perform an external inspection on an induction motor.
14. Three-phase motor internal inspection.1:25
In this video we will perform an internal inspection on a three-phase motor.
Three-Phase motor Quiz.

1. Single Phase motors.3:53
In this video we will look at single phase induction motors.
2. Single-Phase motor Forward / Reverse, Motor / Control circuit with indicator2:53
In this video we will look at how a single phase motor circuit works.
3. Fault finding and circuit inspection (Part 1).6:17
In this video we will learn how to do fault finding.
4. Single-Phase motor external inspection.0:20
This video we will learn how to inspect a single-phase motor externally.
5. How to locate components in a Single-Phase motor.3:24
In this video we will learn how to locate components inside a single phase motor. This video forms part of the motor inspection.
6. Single-Phase motor internal inspection.4:08
In this video we will perform an internal inspection on a single-phase motor.
Single Phase motor quiz.
Single and Three Phase Electrical Basics final test.

Requirements

There are no requirements for this course, this course was designed to explain electricity and electrical systems in such a way that someone who does not have any electrical work experience will understand it. This course is not math intensive, but we will cover a few basic formulas. If mathematics is not your strong point, there is no shortage of online calculators that can do the calculations for you.

Description

This course was written in such a way that someone who does not have any electrical work experience will understand it. However, most people can learn something from this course even if they have previous electrical work experience or knowledge. It takes roughly one day to work through this course.

By the end of this course, we will have a fair understanding of;

1. Electrical Circuit Basics.

Voltage
Current
Resistance
Power
Energy
Direct Current
Alternating Current
Series
Parallel
Ohm's Law with examples
Protective Systems

2. Single and Three-Phase Electricity.

Single and Three-Phase power generation
Single and Three-Phase transmission
Single and Three-Phase circuit layouts

3. Electrical Transformers.

Step-up Transformers
Step-Down Transformers
Single-Phase Transformers
Three-Phase Transformers

4. Electrical Test Equipment and how to use them.

Multimeters
Clamp meters
Insulation Resistance Testers
PSC / Loop Testers
Phase Rotation Testers
ELCB / Polarity Testers
Earth Resistance Testers

5. Single and Three-Phase motors.

Single and Three-Phase motor control circuits
Wye/Star and Delta configurations
Star-Delta starters
Single and Three-phase motor inspections. (External and internal)
Fault Finding.

Just like this course description, the videos are short, on topic and straight to the point.

This course does not qualify you as an electrician and does not authorize you to conduct any electrical work. This course is not math intensive, but we will cover a few basic formulas. If mathematics is not your strong point, there is no shortage of online calculators that can do the calculations for you.

Who this course is for:

Anyone who wants to learn more about Single / Three-Phase electricity in general.
Anyone who wants to learn more about Single / Three-Phase transformers. (Step-Up, Step-Down)
Anyone who wants to learn how Single / Three-Phase motor circuits work.
Anyone who wants to learn more about Single / Three-Phase Induction Motors and how to inspect them.
Anyone who wants to learn how to use electrical test equipment. (Multimeters, Clamp Meters, Insulation Resistance Testers, PSC/Loop Testers, Phase Rotation Testers, ELCB/Polarity Testers, Earth Resistance Testers)
Anyone who struggles to understand the difference between Voltage, Current, Resistance, Power and Energy.
Anyone who struggles to understand the difference between Direct Current and Alternating Current.
Anyone who struggles to understand Three-Phase Voltage Potentials.
Anyone who struggles to understand the difference between Wye and Delta configurations.
Anyone who want's to know why transformers only work with AC electricity and why we mainly transmit AC electricity over long distances.
Electricians
Electrical engineers
Electrical designers
Industrial workers

Single and 3-Phase electrical circuit basics A to Z

What you'll learn

Explore related topics

Course content

Introduction1 lecture • 2min

Module 1.14 lectures • 38min

Module 230 lectures • 1hr 4min

Module 36 lectures • 21min

Module 411 lectures • 30min

Module no 526 lectures • 59min

Module 614 lectures • 34min

Module 76 lectures • 21min

Requirements

Description

Who this course is for: