The enclosure is the outer box that protects all components. It shields parts from dust, water, and impact. These boxes are typically made from sturdy metals such as stainless steel or cast. Power Distribution Equipment is a term generally used to describe any apparatus used for the generation, transmission, distribution, or control of electrical energy. This section concentrates upon commonly used power distribution equipment: Panelboards, Switchboards, Low-Voltage Motor Control. A three phase distribution box controls and guards electricity in three-phase power systems. Big buildings with many floors. Type 1 Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts and to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt). 4kV to the distribution cabinet (primary distribution cabinet), then the outgoing line is led to the distribution box (secondary distribution box) in each building, and finally the outgoing line is led to the distribution cabinet. The main job of a 3-phase distribution board is to receive incoming power, distribute it to various circuits, and protect those circuits. Here's what typically happens inside the board: – Power enters from the main switch or incoming isolator, usually via a main circuit breaker or MCCB rated for.