Beginner Guide
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.
Wiring Guide
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.
Beginner Guide
Series vs Parallel Circuits: What's the Difference and Which One Should You Use?
Series and parallel circuits behave completely differently — and knowing which to use could save your appliances (or your life). This guide explains both with clear examples you can simulate for free.