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.
RCD Protection Zones Explained: How to Design a Modern Consumer Unit
Split-load, fully RCBO, whole-board RCD — which layout gives the best protection without constant nuisance trips? This guide explains how RCD protection zones work, how to plan circuit allocation, and what BS 7671 actually requires for new and upgraded consumer units.
How to Wire a Lighting Circuit: Loop-In and Junction Box Methods Explained
A complete UK guide to wiring a domestic lighting circuit from the consumer unit — cable sizing, MCB selection, loop-in method, junction box method, switch drops, two-way switching, and how many lights a circuit can supply. Includes step-by-step wiring for both methods.
How to Wire a Motion Sensor / PIR Light Switch: Indoor and Outdoor Guide
A PIR motion sensor switch automatically turns lights on when it detects movement and off after a set time. This UK guide covers how PIR switches work, the difference between 2-wire and 3-wire units, step-by-step wiring for indoor and outdoor installations, override switching, and Part P rules.
Old vs New UK Wire Colours Explained: Red, Black and Green to Brown, Blue and Green-Yellow
The UK changed its electrical wiring colour code in 2004. This guide explains what changed, why it changed, how to identify old and new wiring, what the colours mean in single-phase and three-phase systems, and how to work safely on installations that mix both.
How to Add a Spur from a Ring Main: Rules, Methods and Step-by-Step Guide
Adding a spur from a ring main is one of the most common DIY electrical tasks in the UK. This guide covers BS 7671 spur rules, fused vs unfused spurs, how to find a safe take-off point, step-by-step wiring, and when the work is notifiable under Part P.
How to Wire a Kitchen: Dedicated Circuits for Every Appliance
A kitchen needs more dedicated circuits than any other room in the house. This UK guide covers ring mains, cooker circuits, washing machine, dishwasher, fridge, under-cabinet lights, and how to plan your consumer unit allocation — all to BS 7671.
EICR Codes Explained: C1, C2, C3 and FI — What Each Code Means
Your EICR report lists observations with codes C1, C2, C3, or FI. This guide explains what each code means, which faults produce which codes, what remedial work costs, and what happens if you ignore a C2 finding on a rented property.
Electric Underfloor Heating Wiring: Mat, Cable and Thermostat Installation
Electric underfloor heating provides comfortable warmth without radiators. This UK guide explains mat vs cable systems, 230 V vs SELV options, thermostat wiring, load calculations, floor insulation requirements, and safe installation.
Electrical Load Calculations for Home Circuits: How to Size Your Installation
Calculating electrical load is essential for planning circuits, sizing consumer units, and ensuring your installation can handle demand. This guide explains how to calculate total house load, apply diversity factors, and plan circuit distribution for UK homes.
Part P Building Regulations Explained: What UK Homeowners Can and Can't DIY
Part P of the UK Building Regulations controls nearly every piece of fixed electrical work in a home. This guide explains what is notifiable, what is not, the three routes to compliance, what happens if you skip notification, and how to plan a Part P-notifiable job safely.
How to Install an EV Charger: Dedicated Circuit Guide for Home Charging
Installing an EV charger at home requires a dedicated high-current circuit, PEN fault protection for PME supplies, and often DNO notification. This UK guide covers 7 kW and 22 kW chargers, cable sizing, earthing requirements, and safe installation.
How to Wire a Fused Connection Unit (FCU): Switched, Unswitched and Spur Rules
A Fused Connection Unit provides fused protection for permanently connected appliances. This UK guide explains how to wire switched and unswitched FCUs, when to use them, fuse ratings, and the rules for adding spurs to ring circuits.
How to Wire an Electric Shower: Cable Size, MCB Rating and Safe Installation
Electric showers draw 40–50 A and need dedicated high-current circuits. This UK guide explains cable sizing, MCB/RCBO selection, double-pole isolation, routing requirements, and Part P notification for safe shower installation.
Why Does My MCB Keep Tripping? Overload, Short Circuit and Fault-Finding Guide
An MCB that keeps tripping is usually caused by overload, short circuit, appliance failure, damaged wiring, or an incorrectly rated breaker. This guide explains how to identify the cause safely and when to call an electrician.
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.
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.
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.
How to Wire a Shed or Outbuilding: Complete UK Electrical Guide
Powering a shed, garage, or garden outbuilding safely requires the right cable type, burial depth, consumer unit, earthing, and RCD protection. This complete UK guide covers everything from planning to testing.
How to Wire an Outdoor Socket: Garden Power and External Sockets Explained
A complete UK guide to installing outdoor sockets and garden power — IP ratings, cable types, RCD protection, burial depth, Part P notification, and how to plan a safe outdoor circuit from the consumer unit.
IP Rating Explained: IP44, IP65, IP67 and What Every Number Means
IP ratings tell you exactly how well an electrical fitting resists dust and water. This guide decodes every IP number, explains which rating you need for bathrooms, kitchens, and outdoors, and covers the BS 7671 zone requirements.
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.
Intermediate Switch Wiring: How to Control a Light from Three or More Locations
Want to control one light from three switches — at the bottom of the stairs, the top, and a landing? That requires an intermediate switch. This guide explains two-way and intermediate switching with clear wiring diagrams.
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.
5 Common Electrical Wiring Mistakes (and How to Avoid Them)
Reverse polarity, missing earths, overloaded rings — these five wiring mistakes are found in thousands of UK homes. Learn what they are, why they're dangerous, how to spot them, and how to test your own circuits safely.
Ring Circuit vs Radial Circuit: What's the Difference?
Ring circuits and radial circuits are the two ways to wire socket outlets in UK homes. This guide explains how each works, when to use each, cable sizes, spur rules, and how to simulate both topologies in a free browser-based circuit simulator.