The box should be level, easily accessible, and positioned at the proper height according to local codes. Ensure adequate clearance around the box for maintenance access. Connect the main electrical supply to the main switch or breaker. It is commonly used in homes, offices, and industrial settings to control and protect electrical circuits. Understanding its significance. Fiber closure protects spliced fibers in backbone and feeder lines, fiber box (or fiber distribution box) organizes and splits fibers in communities or buildings, and fiber terminal box provides the final termination for indoor drop cables. To find it quickly, look for a rectangular gray metal box about the size of a medicine cabinet, often positioned close to. 1 State Historic Landmark 945 Recognizes the first successful introduction of the honeybee to California. A History of San Jose A mural by Californian artist Milliard Sheets depicts a thousand years of Santa Clara Valley history. Rolling Ball Sculpture (Wellpiece XXXI) Audio-kinetic boll machine. A distribution box, also known as a distribution board, electrical panel, or breaker box, is an enclosure that houses electrical components responsible for distributing electricity throughout a building.