BS 7671 Amendment 4:2026 Explained: Key Changes Before 15 October
BS 7671 Amendment 4 covers battery storage, powered data cables, ICT earthing and more. Learn what changes in plain English before 15 October 2026.
Electrical Safety Certificates Explained: EICR vs Electrical Installation Certificate vs Minor Works
EICR, Electrical Installation Certificate, Minor Works Certificate, Part P compliance — four documents, four different triggers, constant confusion. This guide explains which electrical certificate you need, when, why, and what each one actually proves.
Cable Clipping and Containment: How to Run Electrical Cables Safely and Legally
How you route and support electrical cables is just as important as choosing the right size. This guide covers every containment method — surface clipping, conduit, trunking, cable tray, concealed runs — and explains the BS 7671 rules on prescribed zones, the 50 mm depth rule, and mechanical protection.
Types of Earthing Systems Explained: TN-S, TN-C-S (PME) and TT
TN-S, TN-C-S (PME) and TT are the three earthing systems used in UK domestic installations. This guide explains exactly how each one works, how to identify yours, and why earthing is the foundation of electrical safety.
Electrical Cable Sizes Explained: 1mm², 1.5mm², 2.5mm², 6mm² and Beyond
A complete UK guide to electrical cable sizes — current ratings, maximum lengths, correct applications for every circuit type, and how to choose the right cable size for sockets, lighting, cookers and EV chargers.
How to Wire a Ring Main Circuit: The UK Ring Final Circuit Explained
The ring main is uniquely British and widely misunderstood. This guide explains exactly how a ring final circuit works, why it uses 32 A protection with 2.5mm² cable, how spurs work, and what BS 7671 requires.
What Is an RCBO? The Difference Between RCD, MCB and RCBO Explained
An RCBO combines overcurrent protection with earth leakage detection in one device. This guide explains how it works, how it compares to MCBs and RCDs, and when you should use one.