Low-Voltage Electrical Installation Course

Lesson 1 • Voltage, Current, and Resistance

Defines the three fundamental electrical quantities and their relationships. Provides the quantitative foundation for all subsequent circuit analysis in the course.

Lesson 2 • Magnetism and Electromagnetic Induction

Explains magnetic fields and induction principles underlying transformers and motors. Supports understanding of equipment encountered in low-voltage installations.

Lesson 3 • Alternating Current Fundamentals

Introduces AC waveforms, frequency, and phase relationships. Prepares students for working with the AC supply systems used in low-voltage networks.

Lesson 4 • Power and Energy Calculations

Covers electrical power formulas and energy consumption measurement. Enables accurate load estimation for network design and equipment sizing.

Lesson 1 • Working Safely Near Live Conductors

Establishes approach boundaries and safe-work methods for proximity to energized parts. Prepares students for situations where full de-energisation is not possible.

Lesson 2 • Electrical Hazards and Risk Assessment

Identifies shock, arc flash, and fire hazards present in low-voltage environments. Establishes the risk-assessment mindset required before any installation task.

Lesson 3 • Lockout and Tagout Procedures

Details energy isolation methods to prevent accidental energisation during work. Directly protects workers performing installation and maintenance tasks.

Lesson 4 • Personal Protective Equipment for Electrical Work

Covers selection, inspection, and use of PPE rated for low-voltage tasks. Ensures students choose appropriate protection for each work scenario.

Lesson 1 • Cable Sizing and Current Capacity

Applies derating factors and current-carrying capacity tables to size cables correctly. Prevents overheating and voltage drop failures in completed installations.

Lesson 2 • Jointing, Termination, and Splicing

Teaches correct methods for connecting and terminating low-voltage cables. Ensures reliable, low-resistance joints that meet safety and performance standards.

Lesson 3 • Cable Construction and Insulation Types

Examines insulation materials, sheathing, and armouring used in low-voltage cables. Enables correct cable selection for mechanical, thermal, and chemical environments.

Lesson 4 • Conductor Materials and Properties

Compares copper and aluminium conductors by resistivity, weight, and cost. Informs material selection decisions made throughout the installation process.

Lesson 1 • Panel Assembly and Wiring Practices

Demonstrates correct layout, wiring, and labelling practices for distribution board assembly. Produces panels that are safe, maintainable, and compliant with installation standards.

Lesson 2 • Distribution Board Components

Identifies busbars, miniature circuit breakers, isolators, and metering devices within a distribution board. Provides component-level knowledge needed for assembly and fault diagnosis.

Lesson 3 • Switchgear Installation and Commissioning

Covers mounting, alignment, and initial energisation of low-voltage switchgear assemblies. Prepares students to safely bring new distribution equipment into service.

Lesson 4 • Residual Current Protection Devices

Explains RCD operating principles, sensitivity levels, and installation requirements. Protects personnel and equipment from earth-fault and leakage current hazards.

Lesson 1 • Main and Supplementary Bonding

Explains where and how to apply main and supplementary equipotential bonding. Reduces touch voltage risk in areas where extraneous conductive parts are present.

Lesson 2 • Lightning and Surge Protection Bonding

Integrates surge protective devices and lightning protection bonding into the earthing system. Prevents transient overvoltages from damaging equipment or causing shock hazards.

Lesson 3 • Earthing System Configurations

Compares TN-S, TN-C-S, TT, and IT earthing arrangements by topology and application. Enables correct system selection based on supply type and installation requirements.

Lesson 4 • Earth Electrode Design and Installation

Covers rod, plate, and tape electrode types along with soil resistivity measurement. Ensures earth electrodes achieve the resistance values required for effective fault protection.

Lesson 1 • Overcurrent Protection Principles

Explains overload and short-circuit protection requirements and their coordination. Ensures every circuit is protected against both sustained overload and instantaneous fault conditions.

Lesson 2 • Fuse Selection and Application

Covers fuse types, ratings, and replacement procedures for low-voltage circuits. Ensures correct fuse selection for both overload and short-circuit protection duties.

Lesson 3 • Automatic Disconnection of Supply

Verifies that fault protection achieves disconnection within required time limits. Confirms that the installation meets the automatic disconnection of supply protection method.

Lesson 4 • Motor and Transformer Protection

Addresses the specific protection requirements of motors and transformers in low-voltage networks. Applies overload relays, thermal protection, and differential schemes to these loads.

Lesson 1 • Continuity and Polarity Testing

Verifies protective conductor continuity and correct polarity of all connections. Confirms that earthing and bonding conductors form unbroken paths throughout the installation.

Lesson 2 • Test Documentation and Certification

Compiles test results into installation certificates and schedules of test results. Produces the legal documentation required for handover and future maintenance reference.

Lesson 3 • Insulation Resistance Testing

Covers insulation resistance test procedures, voltage levels, and pass criteria. Detects degraded insulation that could cause shock or fire hazards in service.

Lesson 4 • Earth Fault Loop Impedance Testing

Measures earth fault loop impedance to verify automatic disconnection compliance. Links measured values to protective device characteristics for pass or fail determination.

Lesson 5 • RCD Testing and Functional Checks

Performs RCD trip-time and ramp tests to confirm correct operation under fault conditions. Validates that residual current protection meets required sensitivity and speed.

Lesson 1 • Protection System Functional Testing

Performs secondary injection and primary injection tests on protection relays and devices. Validates that all protective functions operate correctly before the network enters service.

Lesson 2 • Energisation Sequence and Procedures

Defines the step-by-step sequence for safely energising a low-voltage network from the supply point outward. Prevents equipment damage and personnel injury during first energisation.

Lesson 3 • Handover Documentation and Client Training

Prepares operation and maintenance manuals and delivers client training on the installed system. Ensures the client can operate, maintain, and safely modify the network after handover.

Lesson 4 • Load Testing and Performance Verification

Applies measured loads to verify voltage regulation, current balance, and thermal performance. Confirms the network operates within design parameters under realistic conditions.