Electrical Guides and Articles
Clear explanations of wiring, components, regulations, and electrical safety.
Why Does My RCD Keep Tripping? Common Causes and Safe Fault-Finding Steps
An RCD that keeps tripping is usually detecting earth leakage, moisture, appliance faults, damaged cables, or nuisance leakage from multiple devices. This guide explains the causes and gives a safe step-by-step checklist for narrowing down the problem.
Consumer Unit Upgrade: What to Expect When Replacing Your Fuse Board
Upgrading an old fuse board to a modern consumer unit with RCDs and RCBOs is the single most impactful electrical safety improvement you can make to a UK home. This guide explains what changes, what the process involves, how long it takes, and what it costs.
How to Wire a Cooker or Electric Oven: UK Circuit Guide
Wiring a cooker or electric oven requires a dedicated high-current circuit, a cooker control unit, and the right cable size. This UK guide covers everything — cable sizing, cooker switch, consumer unit connection, diversity, and Part P.
Kirchhoff's Laws Explained: KCL and KVL with Worked Examples
Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL) are the two fundamental rules for analysing any electrical circuit. This guide explains both laws clearly, with worked examples, and shows how they extend Ohm's Law to complex networks.
How to Wire a Bathroom: Complete Zone-by-Zone UK Guide
Bathroom electrical wiring in the UK is governed by strict zone requirements, IP ratings, RCD protection, supplementary bonding, and SELV lighting rules. This complete guide covers everything you need to know before touching a wire in a bathroom.
Voltage Drop Explained: How to Calculate It and Why It Matters
Voltage drop is the loss of voltage along a cable run due to resistance. Too much drop and appliances under-perform or protection devices fail to operate. This guide explains the calculation method, BS 7671 limits, and how to choose cable sizes for long runs.
When to Get an EICR: The Complete Electrical Safety Inspection Guide
An EICR (Electrical Installation Condition Report) is the only way to know if your home's wiring is safe. This guide explains what an EICR is, when you need one, what the codes mean, how much it costs, and what happens if your installation fails.
How a Timer Switch Works and How to Wire One: Mechanical, Digital and Astronomical
Timer switches automate lighting, heating, and appliances by switching circuits on and off at set times. This guide explains how mechanical, digital, and astronomical timers work, how to wire each type, and which to use for different applications.
How to Wire a Ceiling Rose and Light Fitting: Loop-In, Junction Box and 3-Plate Methods
A complete UK guide to ceiling rose wiring — the loop-in method, junction box method, and modern 3-plate method. Includes terminal-by-terminal instructions, two-way switching connections, and what to do with old red/black cables.