Reference Library

Wiring Guides & References

Practical guides built around real work. Plan safely, read drawings, diagnose faults, check calculations, record results, and find installation references without textbook filler.

11 guides

Beginner7 min read

Safe Isolation Procedure

The correct sequence for proving a circuit dead before you work on it. Non-negotiable.

SafetyRead →

Beginner6 min read

Cable Colour Codes: All Regions

Side-by-side conductor colours for the UK, Europe, North America and Australia/New Zealand: plus the old codes you'll still meet.

StandardsRead →

Intermediate8 min read

RCD Types: AC, A, F and B Explained

Which residual current device to fit, why it matters for EV chargers, solar and VSDs, and what the ratings mean.

SafetyRead →

Intermediate10 min read

Earthing Systems: TN-S, TN-C-S and TT Explained

How the supply earth is arranged, how to tell which one you have, and what each means for protection.

StandardsRead →

Intermediate9 min read

Insulation Resistance Testing (IR Test)

How to perform and read a 250 V / 500 V insulation resistance test, and what a low reading is telling you.

TestingRead →

Intermediate11 min read

Earth Fault Loop Impedance: Step by Step

Measure Ze and Zs, understand the loop, and verify the protective device will disconnect fast enough.

TestingRead →

Intermediate9 min read

Conduit Fill & Cable Capacity

Work out how many cables fit in a conduit without overheating or damaging insulation on the pull.

CalculationsRead →

Intermediate10 min read

Maximum Demand & Diversity for a House

Size the main switch and supply conductors realistically: because everything is never on at once.

CalculationsRead →

Beginner8 min read

Single-Phase Socket Outlet Wiring

Ring finals vs radials, correct terminations, spurs, and the checks before you screw it back to the wall.

WiringRead →

Beginner12 min read

Electrical Symbols & Wiring Diagrams

Read schematics, functional wiring views, terminal identifiers, and fault paths with confidence.

WiringRead →

Intermediate15 min read

Electrical Field Toolkit

A clear job workflow for planning, safe testing, fault diagnosis, recording results, and professional handover.

FieldworkRead →

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