Tray cable is used for power and control wiring in ducts, conduits, and cable trays. The cabling is available in multiconductor configurations and rated for direct burial (TC-ER). Tray cable is the best choice for large industrial panels and applications that feature complex control. Distribution panels, breaker panels, load center, and/or distribution boards—any name you call them, they're a key part of every electrical system. But what exactly is a power distribution box, and why is it so essential in our daily lives? The DB panel board controls the flow of electricity. Inside a distribution box are components like circuit breakers, earth leakage units, doorbells, and timers. By understanding the different elements depicted in these diagrams, homeowners can better understand how their utilities are delivered and. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit. Structured wiring refers to a whole-house network of audio, video, data, telephone, television, home automation or security signals. It may be put in during a remodel.