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...
Symbols for Lighting Fixtures in Wiring Diagrams
Light fixture symbols help differentiate between types of lighting. Ceiling lights, for example, are often drawn as circles representing the light fixture itself. Solid...
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...
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...
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...
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...
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...
Safe Working at Heights in the Electricity Supply Industry
Working at heights on electricity network poles and structures involves serious risks such as falls and electrical hazards. Proper training, equipment, and safe practices...
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,...
Switch Symbols and Their Uses
Generic Switch Symbol
It is the symbol of a generic switch in open condition.
Closed switch
It is a generic symbol for closed switch. a closed switch...
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...
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...
