The PE (Protective Earth) wire should be securely connected to the PE or grounding bar inside the distribution box using a properly stripped copper wire, ensuring firm contact and clear marking for safety.

Step-by-Step Connection

1. Locate the PE Bar: Open the distribution box and identify the grounding bar or the terminal marked with PE. This is the designated point for connecting the protective earth wire and any other components that require grounding . 2. Prepare the PE Wire: Use a yellow-green insulated copper wire with a cross-sectional area that meets or exceeds the specifications for your installation. Strip the insulation from the end of the wire to expose enough copper to make a secure connection . 3. Connect the PE Wire: Insert the stripped end of the PE wire into the terminal on the PE bar. Tighten the screw firmly with a screwdriver to ensure a solid mechanical and electrical connection. Avoid loose connections, as they can compromise safety . 4. Ground Electrical Components: If there are other electrical components inside the distribution box that require grounding, connect them to the PE bar using additional copper wires. This ensures all metallic parts are safely earthed . 5. Verify and Mark Connections: After connecting, check that all connections are tight and secure. Clearly mark the PE wire and terminals for easy identification during maintenance or inspection . 6. Safety Precautions: Always turn off the main power before working inside the distribution box. Use insulated tools and follow local electrical codes. Ensure the grounding system complies with relevant standards to achieve effective protection . By following these steps, the PE wire will provide a reliable path to ground, protecting both the electrical system and users from potential hazards.