Electrical Wiring Guides & Circuit Tutorials
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Electrical Guides and Articles
Clear explanations of wiring, components, regulations, and electrical safety.Looking for what's new in the app? Product updates & release notes →
What is a Contactor and How Does It Work?
A contactor is an electrically controlled switch built for high-power loads. This guide explains how contactors work, where they're used, how they differ from relays and MCBs, and how to simulate a contactor circuit in a free electrical circuit simulator.
What Is an RCD? Meaning, Types and How They Work (UK)
RCD stands for Residual Current Device — a 30 mA safety switch that cuts power when current leaks to earth. Types, ratings, testing and UK rules.
Getting Started with ElectraSim: Build and Simulate Your First Circuit in 5 Minutes
New to ElectraSim? This step-by-step guide shows you how to place components, draw wires, run a simulation, and read the fault log — all in your browser, for free.
What is an MCB Breaker? Types B, C, D & How MCBs Work
What is an MCB and how does it protect circuits? Learn how miniature circuit breakers trip on overloads and short circuits, plus Type B, C, and D ratings.
Series vs Parallel Circuits: Differences, Rules & Diagrams
Difference between series and parallel circuits explained with diagrams. Compare voltage, current, and resistance rules with interactive wiring examples.
How Household Wiring Works: A Complete Beginner's Guide
Learn how household electrical wiring works — from the main circuit breaker panel to your light switch. Understand live, neutral and earth wires, how MCBs protect your home, and what causes common faults.