Single and ThreePhase electrical circuit basics A to Z

AC / DC Explained, Single / Three-Phase motor circuits, Test Equipment, House Wiring, Ohm’s law and fault finding.
Single and ThreePhase electrical circuit basics A to Z
File Size :
2.56 GB
Total length :
4h 27m


Johanna Christina Hälbich


Last update




Single and ThreePhase electrical circuit basics A to Z

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.

Single and ThreePhase electrical circuit basics A to Z


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.


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 startersSingle 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..


Section 1: Introduction

Lecture 1 Introduction

Section 2: Module 1.

Lecture 2 1. An introduction to electricity.

Lecture 3 2. Conductors.

Lecture 4 3. Insulators.

Lecture 5 4. What is an electrical circuit?

Lecture 6 6. Voltage.

Lecture 7 7. Current.

Lecture 8 8. Resistance.

Lecture 9 9. Power.

Lecture 10 10. Energy.

Lecture 11 12. Power supplies in series.

Lecture 12 13. Loads in series.

Lecture 13 14. Power supplies in parallel.

Lecture 14 15. Loads in parallel.

Lecture 15 16. Symbols and Unit Abbreviations.

Section 3: Module 2

Lecture 16 1. Oscilloscope graph.

Lecture 17 2. Direct Current.

Lecture 18 3. Alternating Current.

Lecture 19 5. AC Frequency.

Lecture 20 6. AC Peak values.

Lecture 21 7. AC Peak-to-Peak values.

Lecture 22 8. AC RMS values. (SHORTCUT METHOD)

Lecture 23 9. AC RMS values. (RMS METHOD)

Lecture 24 11. Step-Up and Step-Down transformers.

Lecture 25 12. Electromagnetism.

Lecture 26 13. Single-Phase Alternators.

Lecture 27 14. Single-Phase Transformers.

Lecture 28 16. Ohms Law Part 1. (Triangle Formulas)

Lecture 29 17. Ohms Law Part 2. (Example of matched load and supply)

Lecture 30 18. Ohms Law Part 3. (Example of high current)

Lecture 31 19. Ohms Law Part 4. (Example of low current)

Lecture 32 20. Ohms Law Part 5. (Example of low voltage)

Lecture 33 21. Ohms Law Part 6. (Example of high voltage)

Lecture 34 22. Ohms Law Part 7. (Wheel Formulas)

Lecture 35 24. Power supplies in series calculations.

Lecture 36 25. Power supplies in parallel calculations.

Lecture 37 26. Loads in series calculations.

Lecture 38 27. Loads in parallel calculations.

Lecture 39 28. Loads in series and parallel calculations.

Lecture 40 30. Ohms Law for AC circuits.

Lecture 41 31. Capacitors and capacitance.

Lecture 42 32. Capacitive reactance.

Lecture 43 33. Inductors and Inductance.

Lecture 44 34. Inductive Reactance.

Lecture 45 35. Impedance.

Section 4: Module 3

Lecture 46 1. Types of power stations.

Lecture 47 2. Single-Phase transmission.

Lecture 48 3. Three-Phase transmission. (Wye)

Lecture 49 4. Three-Phase voltage potentials.

Lecture 50 6. Three-Phase transmission. (Delta)

Lecture 51 7. Three-Phase Delta High-Leg.

Section 5: Module 4

Lecture 52 1. Electrocution.

Lecture 53 3. Single-Phase supply circuit layout.

Lecture 54 4. Three-Phase supply circuit layout.

Lecture 55 5. Intermediate Light Switch circuit.

Lecture 56 6. Single-Phase Energy meters.

Lecture 57 7. Three-Phase Energy meters.

Lecture 58 8. TN-C Earthing system.

Lecture 59 9. TN-C-S Earthing system.

Lecture 60 10. TN-S Earthing system.

Lecture 61 11. TT Earthing system.

Lecture 62 12. IT Earthing system.

Section 6: Module no 5

Lecture 63 1. Multimeter – Layout and design.

Lecture 64 2. Multimeter – Leads.

Lecture 65 3. Multimeter – Display count.

Lecture 66 4. Multimeter – Accuracy.

Lecture 67 5. Multimeter – Resistance measurements.

Lecture 68 6. Multimeter – Continuity buzzer.

Lecture 69 7. Multimeter – AC and DC voltage measurements.

Lecture 70 8. Multimeter – AC and DC current measurement.

Lecture 71 9. Multimeter – Capacitance measurements.

Lecture 72 10. Multimeter – Frequency measurements.

Lecture 73 11. Clamp Meter – Layout and design.

Lecture 74 12. Clamp Meter – AC and DC current measurements.

Lecture 75 13. Insulation Resistance Tester – Layout and design.

Lecture 76 14. Insulation Resistance Tester – Normal resistance measurements.

Lecture 77 15. Insulation Resistance Tester – Insulation Resistance Measurements.

Lecture 78 16. Insulation Resistance Tester – AC Voltage measurements.

Lecture 79 17. Insulation Resistance Tester – Capacitance discharge feature.

Lecture 80 18. PSC / Loop Tester – Layout and design.

Lecture 81 19. PSC / Loop Tester – Loop Impedance measurements.

Lecture 82 20. PSC / Loop Tester – Calculating Prospective Fault Current.

Lecture 83 21. PSC / Loop Tester – Prospective Short-Circuit Current measurements.

Lecture 84 22. Earth Resistance Tester – Layout and design.

Lecture 85 23. Earth Resistance Tester – Earth Resistance Measurements.

Lecture 86 24. Phase rotation tester.

Lecture 87 25. ELCB/Polarity Tester. – Earth Leakage sensitivity.

Lecture 88 26. ELCB/Polarity Tester. – Polarity testing.

Section 7: Module 6

Lecture 89 1. Three-Phase motors explained.

Lecture 90 2. Three-Phase motor-Wye configuration.

Lecture 91 3. Three-Phase motor-Delta configuration.

Lecture 92 4. Three-Phase motor circuit.

Lecture 93 5. Motor control circuit.

Lecture 94 6. Three-Phase motor / control circuit, Forward / Reverse upgrade.

Lecture 95 7. Control circuit indicator lights upgrade.

Lecture 96 8. Current and Voltage gauges upgrade.

Lecture 97 9. Circuit layout SIMPLIFIED.

Lecture 98 10. Star-Delta Starter upgrade PART 1.

Lecture 99 11. Star-Delta Starter Upgrade PART 2.

Lecture 100 12. Star-Delta Starter upgrade PART 3.

Lecture 101 13. Three-phase motor external inspection.

Lecture 102 14. Three-phase motor internal inspection.

Section 8: Module 7

Lecture 103 1. Single Phase motors.

Lecture 104 2. Single-Phase motor Forward / Reverse, Motor / Control circuit with indicator

Lecture 105 3. Fault finding and circuit inspection (Part 1).

Lecture 106 4. Single-Phase motor external inspection.

Lecture 107 5. How to locate components in a Single-Phase motor.

Lecture 108 6. Single-Phase motor internal inspection.

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

Course Information:

Udemy | English | 4h 27m | 2.56 GB
Created by: Johanna Christina Hälbich

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