Päämaadoituspiste

Päämaadoituspiste, often translated as main earthing terminal, is a critical component in electrical safety systems. It serves as the central connection point for all protective earthing conductors within a building or installation. The purpose of the main earthing terminal is to provide a low-resistance path for fault currents to flow safely to the earth, thereby preventing dangerous voltages from appearing on exposed conductive parts.

This terminal is typically a single, accessible point where the main earthing conductor, bonding conductors from metallic services (such as water pipes and gas pipes), and the earthing conductors from the electrical installation all converge. By consolidating these connections, it ensures that all metallic elements that could potentially become live during a fault are effectively linked together and to earth. This common earthing point is essential for the proper functioning of overcurrent protective devices, like fuses and circuit breakers, which are designed to disconnect the power supply when a fault current exceeds a safe level.

The installation and connection of the päämaadoituspiste must adhere to strict electrical codes and standards to guarantee its effectiveness and reliability. Proper grounding and bonding are fundamental to preventing electric shock and fire hazards. The main earthing terminal is a cornerstone of these safety measures, providing a unified and robust connection to the earth.