Earthing Systems | IEC 60364 Standard | Major Types Earthing Systems | Terra Terra Earthing Systems

Defined by the IEC 60364 standard, which are essential for electrical safety and functionality:
⭕TT System
🟩In this system, the neutral is directly grounded at the source, and the exposed conductive parts of the installation are connected to a ground electrode independent of the source ground. It's often used in areas with poor ground conductivity.
⭕IT System
🟩Here, the neutral is either not connected to ground or connected through a high impedance. The exposed conductive parts are connected to a local ground. It's commonly used in specialized environments like hospitals or isolated systems.
⭕TN System
🟩The TN system has variations
🟩TN-C Combines neutral and protective conductor in one (called PEN), but it's less common due to safety concerns.
🟩TN-S Separates neutral and protective conductor throughout the system.
🟩TN-C-S Uses a combined PEN conductor upstream and separates them downstream.

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