Blast Through IGCSE Physics in 2026 – Ace Your Exam Adventure!

The color coding for a live electrical wire is brown. This is based on international wiring standards, where brown is used to indicate the live (or phase) conductor in electrical systems. The live wire carries voltage and, therefore, is critical for the operation of electrical devices.

Green and yellow is specifically reserved for the earth (ground) wire, ensuring safety by providing a path for fault currents. Red is used in some older systems as an indicator of a live wire, but it is not the standard color for new installations. Orange is typically used for specific purposes, such as in temporary wiring or portable equipment, but it is not designated as a standard color for live wires.

Understanding these color codes is essential for safety and proper handling of electrical systems, avoiding potential hazards associated with incorrect wire identification.