Understand the concept, then see it move.
Public learning guides explain important electrical concepts in plain English and connect them to VoltMate's interactive 3D visual models and original exam-practice tools.
Learning directory
Search-friendly guides for core electrical topics
TN-C-S Earthing System Explained
Understand the basic TN-C-S / PME arrangement, the PEN conductor and the separation into neutral and protective earth at the installation intake.
TN-S Earthing System Explained
Learn the basic TN-S arrangement and why the neutral and protective-earth paths remain separate through the supply arrangement shown in the model.
TT Earthing System Explained
Learn how a TT installation uses a local earth electrode and why the protective fault-return path differs from a metallic TN return path.
RCD vs RCBO: What Is the Difference?
Understand the learning difference between residual-current protection and a combined RCBO that also provides overcurrent protection for a circuit.
Ring Final Circuit Explained
Understand the basic topology of a ring final circuit and how it differs conceptually from a radial circuit.
Safe Isolation: The Core Electrical Safety Sequence
Review the high-level safe-isolation learning sequence: identify, isolate, secure, prove the tester, test for dead and re-prove.
Earth Fault Loop Impedance (Zs) Explained
Understand the basic Zs concept: the impedance of the complete earth-fault loop at the point considered and its relationship with fault current.
Three-Phase Electricity Basics Explained
See the basic idea of three AC phase waveforms separated in phase and why three-phase systems are useful for power distribution and rotating fields.
8202 Level 2 Electrical Exam Practice Guide
Prepare for Level 2 electrical theory with original practice questions calibrated to public qualification scope and exam format information.
8202 Level 3 Written Exam Practice Guide
Prepare for Level 3 written electrical theory with original short-answer, calculation and extended-response practice.