Electrician Handbook vs iFixit

Electrician’s Handbook — an app for electricians, students, and installers. Theory, diagrams, and calculators in one place. Works offline. No ads. No subscriptions. — Theory A variety of topics in electrical engineering: from basic concepts to grounding and lighting diagrams. Some topics include exercises with answers for self-check. — Diagrams Interactive electrical diagrams. You can interact with elements to better understand how they work. — Calculators A section with calculators, formulas, and useful reference tables. — Community A section where users can ask questions, share experience, and get advice from other members. — Contents of the "Theory" section: Basic concepts • Voltage, current, resistance, power • Ohm’s Law, Kirchhoff’s rules • Parallel and series connections • Short circuits, safety precautions • Electrical engineering terms Electromechanical converters • Transformer, generator, electric motor • Connecting a three-phase motor using a capacitor Protection and automation devices • Circuit breaker, RCD, RCBO • Voltage monitoring relay, contactor, fuses • Surge protection devices Cables and wires • Wire connection methods • Selecting cross-section by current and power • Color coding • Electrical panel Power stations and substations • Nuclear, thermal, solar, hydro, wind, and geothermal power stations Measuring instruments • Voltmeter, ammeter, ohmmeter, multimeter • Clamp meter • Electricity meter Grounding • Types of grounding systems • Equipotential bonding system Lighting • Incandescent, LED, and other types of lamps • Lamp holders, bases, lumens, lux • Color temperature • LED strip Work execution • Socket repair • Installation of flush-mounted and surface-mounted sockets • Switch installation Additional information • Power supply categories • Surge overvoltages • IP protection rating • Electrician’s tools • Types of outlets and plugs, voltages in different countries • Joule’s Law, Coulomb’s Law • Right-hand and left-hand rules — Contents of the "Diagrams" section: • Switch (1 and 2 gang) • Three-gang switch • Two-way switch • Two-way switch with intermediate switch • Outlets and switch in one block • Lighting with dimmer • Motion sensor lighting • Relay with light sensor • Lighting with impulse relay • Fluorescent lamp wiring • Socket wiring diagrams • Magnetic starter for motor • Star and delta motor connection — Contents of the "Calculators" section: • Basic formula calculator • Electricity cost calculator • SI unit system and metric prefixes • Diameter ↔ cross-section table • AWG to mm and mm to AWG conversion • Electronic component symbols

iFixit brings the world’s repair knowledge into your pocket. Whether you’re fixing your phone, troubleshooting a laptop, or restoring a kitchen appliance, iFixit has everything you need to fix your stuff with confidence. Step-by-step repair guides will make you successful the first time. Each guide is carefully crafted by our expert technicians and our repair community. Diagnose problems faster with smart troubleshooting, battery analytics, and device insights that help you understand how to extend the life of your stuff. Add your things to your personal Workbench and instantly see compatible parts, tools, and replacement guides. Shop the high-quality tools you need for the job directly inside the app. No guesswork, just the right components when you need them. Get personalized support with FixBot, our AI repair assistant. FixBot leverages our huge library of quality resources to help you find the right solution fast. FixBot will even coach you through your repair with hands-free Voice Mode. Share a picture of the issue, and FixBot will take it from there. Join the millions of people who repair instead of replace. Every successful repair saves money, extends the life of your belongings, and helps reduce e-waste. Join the repair revolution.