suojajohtojen
Suojajohtojen is the Finnish term for protective conductors, the conductors that connect exposed conductive parts of electrical equipment to the earth. Their primary purpose is to provide a low-impedance path for fault current, enabling protective devices such as fuses or circuit breakers to disconnect power quickly and thereby reduce the risk of electric shock, equipment damage, and fire. They are a central part of the protective earth (PE) system and are used together with bonding of metallic parts to maintain a safe potential in case of a fault.
In normal operation, suojajohtojen form a continuous path from equipment enclosures, metalwork, and outlets to the
Standards and installation practices for suojajohtojen follow national and international regulations, such as IEC 60364 and