Electrical Guides and Articles
Clear explanations of wiring, components, regulations, and electrical safety.
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.
Electrical Circuit Symbols: Complete Reference Guide
Every electrical circuit symbol you need — wires, power sources, resistors, capacitors, switches, fuses, MCBs, RCDs, lamps, motors, and more. Includes UK/IEC and US comparisons and a printable reference table.
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.
Single Phase vs Three Phase Power: What's the Difference and Which Do You Have?
Single phase and three phase are the two ways the electricity grid delivers power. This guide explains what each means, how to identify which supply you have, why three phase exists, and when a domestic property might need it.
How a Dimmer Switch Works: Trailing Edge vs Leading Edge and Why It Matters for LEDs
Why do some dimmers flicker with LED bulbs? Why do others hum? This guide explains exactly how dimmer switches work, the difference between trailing edge and leading edge types, and how to choose the right dimmer for LED lighting.
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.
Ohm's Law Explained: Voltage, Current and Resistance for Beginners
Ohm's Law is the single most important equation in electronics and electrical engineering. This guide explains voltage, current and resistance from scratch, walks through V=IR with real examples, and shows how the law applies to everyday circuits.
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.