According to the hierarchical and branch circuit principle, in a three-level distribution system, no electrical equipment shall be connected by bypassing levels. (1) Power distribution from the primary main distribution board (distribution cabinet) to secondary distribution boards can be branched; that is, one main distribution board may supply power via multiple branch circuits to several secondary distribution boards. (2) Similarly, power distribution. A switchboard is a large single panel, frame, or assembly of panels on which are mounted (on the face, back, or both) switches, overcurrent and other protective devices, buses, and usually instruments [Art. Whether in a home or an industrial facility, this box keeps your electrical setup organized, functional, and efficient. 5 feet (≈ 2 meter) high in front of the panel. The panelboard's door (hinged cover) shall be able to be opened to a full 90°. in the safety manual, the exact terminology used is “daisy chaining, aka plugging one power strip into another” because it specifically mentions power strips, can you run single port extension cords from one large power strip and can you run multiple power strips off a 3 way extension cord.