Electrical Technology Course

Lesson 1 • Introduction to Electrical Safety

Covers hazards of electrical current on the human body and fundamental protective practices. Establishes safety habits required throughout all subsequent hands-on work.

Lesson 2 • Voltage, Current, and Resistance

Defines the three core electrical quantities and their units of measurement. Connects these quantities through Ohm's Law as the chapter's central analytical tool.

Lesson 3 • Atomic Structure and Electric Charge

Explains how atomic structure determines electrical behaviour in materials. Establishes the physical basis for charge, conductors, insulators, and semiconductors.

Lesson 4 • Power and Energy in Circuits

Introduces electrical power and energy calculations using voltage and current. Reinforces Ohm's Law by extending it to power formulas.

Lesson 1 • Parallel Circuits

Examines circuits with multiple current paths sharing a common voltage. Applies Kirchhoff's Current Law and conductance concepts to parallel networks.

Lesson 2 • Series Circuits

Analyses circuits where components share a single current path. Applies Ohm's Law and Kirchhoff's Voltage Law to find all circuit quantities.

Lesson 3 • DC Measurements and Instruments

Covers proper use of multimeters, ammeters, and voltmeters in DC circuits. Connects measurement technique to circuit analysis verification.

Lesson 4 • Series-Parallel Combination Circuits

Breaks down complex networks into series and parallel sub-circuits for systematic analysis. Builds problem-solving strategies for real-world wiring configurations.

Lesson 1 • Inductors in AC Circuits

Covers inductive reactance and the behaviour of inductors under AC conditions. Contrasts inductive phase relationships with capacitive behaviour.

Lesson 2 • AC Waveform Characteristics

Describes sinusoidal waveforms and their key parameters including amplitude, frequency, and period. Establishes the mathematical language used throughout AC analysis.

Lesson 3 • Capacitors in AC Circuits

Explains capacitive reactance and how capacitors respond to AC signals. Introduces phase relationships between voltage and current in capacitive circuits.

Lesson 4 • Resonance in AC Circuits

Analyses series and parallel resonance conditions and their practical significance. Connects resonance concepts to filtering and tuning applications.

Lesson 1 • Real, Reactive, and Apparent Power

Distinguishes the three types of AC power and their units: watts, VARs, and volt-amperes. Builds the conceptual framework for the power triangle.

Lesson 2 • Three-Phase Power Systems

Introduces three-phase AC generation, wye and delta configurations, and balanced load analysis. Connects three-phase theory to industrial power distribution.

Lesson 3 • Power Measurement Instruments

Covers wattmeters, power analysers, and clamp meters for measuring AC power quantities. Reinforces power factor concepts through practical measurement application.

Lesson 4 • Power Factor Correction

Explains how capacitor banks correct lagging power factor in inductive loads. Covers calculation methods for selecting correction capacitors.

Lesson 1 • Load Calculations and Circuit Planning

Applies standard load calculation methods to size service entrances and branch circuits. Integrates wiring knowledge into complete installation planning.

Lesson 2 • Wire Types and Conductor Sizing

Identifies wire insulation types, conductor materials, and ampacity ratings for various applications. Establishes conductor selection criteria used in all wiring installations.

Lesson 3 • Residential Wiring Circuits

Explains branch circuit wiring for lighting, receptacles, and appliances in residential settings. Applies conductor sizing and protection principles to practical layouts.

Lesson 4 • Conduit Systems and Raceways

Covers rigid, flexible, and non-metallic conduit types and their installation methods. Connects conduit selection to environmental and mechanical protection requirements.

Lesson 1 • AC Induction Motor Fundamentals

Explains rotating magnetic field theory and slip as the basis for induction motor operation. Covers single-phase and three-phase motor types and their characteristics.

Lesson 2 • DC Motor Operation and Control

Covers DC motor construction, torque production, and speed-torque characteristics. Introduces starting and speed control methods for DC machines.

Lesson 3 • Motor Selection and Protection

Guides motor selection based on load type, duty cycle, and enclosure requirements. Covers overload, short-circuit, and thermal protection devices.

Lesson 4 • Transformer Principles and Construction

Explains electromagnetic induction as the basis for transformer operation and voltage transformation. Covers core types, winding configurations, and efficiency factors.

Lesson 1 • Ladder Logic Diagram Fundamentals

Introduces ladder diagram notation, rungs, and logic elements for control circuit documentation. Connects schematic reading skills to control circuit design.

Lesson 2 • Programmable Logic Controllers

Introduces PLC hardware, I/O modules, and basic ladder logic programming. Bridges relay-based control knowledge to programmable automation systems.

Lesson 3 • Variable Frequency Drives

Explains VFD operating principles, parameter configuration, and energy-saving benefits. Connects drive technology to modern industrial motor control practice.

Lesson 4 • Motor Starting and Reversing Circuits

Covers full-voltage, reduced-voltage, and reversing motor starter configurations. Applies ladder logic to design safe and functional motor control schemes.

Lesson 1 • Troubleshooting Motor and Drive Faults

Identifies common motor winding, bearing, and VFD faults using electrical and mechanical tests. Applies motor protection knowledge to diagnose and prevent failures.

Lesson 2 • Wiring and Control Circuit Faults

Diagnoses open circuits, short circuits, and ground faults in wiring and control systems. Reinforces ladder logic reading skills for control circuit troubleshooting.

Lesson 3 • Preventive and Predictive Maintenance

Establishes maintenance schedules, inspection checklists, and condition-monitoring techniques. Integrates all prior knowledge into a proactive reliability strategy.

Lesson 4 • Systematic Troubleshooting Methodology

Presents a structured fault-finding process from symptom identification to verified repair. Establishes a repeatable diagnostic framework applicable to all electrical systems.