pääjohtojen

Pääjohtojen is a Finnish term that translates to "main wires" or "primary leads" in English. It typically refers to the electrical conductors that carry the main power supply to a building, a piece of machinery, or an electrical system. These wires are usually of a larger gauge than internal wiring to accommodate higher current loads and ensure safe and efficient power distribution.

In the context of electrical installations, pääjohtojen are the initial connections made from the power source, such as a utility pole or a transformer, to the building's main electrical panel or fuse box. From this central distribution point, smaller branch circuits then carry electricity to various outlets and fixtures within the building. The proper sizing, installation, and protection of pääjohtojen are crucial for electrical safety and to prevent overloads and potential fires.

The term can also be used in industrial settings to describe the main power cables feeding large machinery or a factory floor. The specifications for pääjohtojen are governed by national and international electrical codes and standards, ensuring that they meet stringent safety and performance requirements. Maintenance and inspection of these primary conductors are important to ensure the continued reliable operation of the electrical system.