Electrical Wiring Color Codes and Standards
IEC (most of Europe) AC power circuit wiring color codes
FunctionlabelColor, IECColor, old IECProtective earthPEgreen-yellowgreen-yellowNeutralNblueblueLine, single phaseLbrownbrown or blackLine, 3-phaseL1brownbrown or blackLine, 3-phaseL2blackbrown or blackLine,...
National Electrical Code (NEC) Basics Every Electrician Should Know
What is the NEC?
The National Electrical Code (NEC) sets the standard for safe electrical wiring and equipment installation in the U.S.
Published by the National...
Electrical Symbols on Floor Plans & Blueprints
Electrical plans, wiring diagrams, and installation layouts all rely on standardized symbols.
Consistency ensures that electricians, inspectors, and contractors all “speak the same language.”
Standardized symbols...
Lockout/Tagout (LOTO) – Why It’s Important for Electricians
🔒 Lockout/Tagout (LOTO) – Why It Matters
⚡ What is Lockout/Tagout?
LOTO = Lock + Tag on equipment during repair, servicing, or maintenance.
Prevents unexpected startup or...
Maximum Load Capacity Rules for Circuits
🔌 What is Electrical Capacity?
Electrical capacity = maximum electricity a circuit, panel, or generator can handle safely.
Measured in Amperes (Amps).
Exceeding capacity → risk of...
Must-Know Electrical Symbols for Electricians
Location Symbols for Installations
Machine, general symbol* function etcLoad, general symbol* detailsMotor starter, general symbol* Indicates type etc.Socket-outlet, general symbol Twin Socket-outlet, general symbolSwitched socket-outlet Twin Switched...
Basic Electrical Safety Rules Every Electrician Must Follow
Keep equipment away from water – Maintain at least 5 feet distance and use GFCIs to prevent shocks and fire hazards.
Unplug safely – Always...
Grounding and Bonding: Safety Essentials
Grounding and Bonding: How Are They Different?
Grounding and bonding are often confused, but they’re not the same. Both work together to keep electrical systems...
Introduction to Common Electrical Symbols
Electrical symbols are universal representations used in diagrams and schematics to show electrical components and connections clearly.
Power Supply Schematic Symbols
SchematicSymbolSymbol IdentificationDescription of SymbolSingle CellA...
Personal Protective Equipment (PPE) in Electrical Work
🛡️ Types of PPE
Head Protection – Hard hats with electrical insulation.
Eye & Face Protection – Safety glasses, goggles, face shields (for sparks/arc flash).
Hearing Protection...
How to Prevent Electrical Shocks on the Job Site
Electrocution is one of the most serious hazards at work. Following simple precautions can greatly reduce the risk.
🔧 1. Use the Right Equipment
Choose double-insulated...
Importance of Earthing Rules in Installations
What is Earthing and Bonding?
Earthing: Connects electrical systems to the ground, providing a safe path for fault currents. Prevents shocks by directing excess electricity...
