Switchboard concept

A switchboard is a large single panel, frame, or assembly of panels. Overcurrent device, switches, protective devices and buses are mounted on a switchboard. They are usually mounted on the front or back, or both. Switchboards are generally accessible from the rear as well as from the front. Several overcurrent protective devices (such as circuit breakers, fuse and control levers) are mounted on the switchboard. Buses are also mounted inside the switchboard. Depending on the design, switchboards may be installed next to a wall or away from the wall to permit accessibility to the rear end of the switchboard.

Splice Plates Splice plates are used to join the horizontal busbars and adjoining switchboard sections. The horizontal busbar is pre-drilled to accept the splice plates. Operator components are mounted on the front side of the switchboard. This includes protective devices, such as circuit breaker, disconnect switches, meters and fuses, which can be covered by a trim panel. There are several options to bring power to the switchboard service section. Cable can be brought to the switchboard from the top or the bottom.

Type of Switchboard

There is a variety of switchboards and the selection is determined by factors, such as space, load and environment. SB1, SB2 and SB3 switchboards can be found in industrial plants, hospitals and commercial buildings. SB1 switchboards -SB1 switchboards are designed to be used in an application where space is a consideration. SB1 switchboards are rear aligned and are accessible from the front. The service section can be deeper than the distribution section. SB2 switchboards- SB2 switchboards have standard rear alignment. Both front and rear alignment options are available. SB2 switchboards are front accessible and front connected. SB3 switchboards- SB3 switchboards are front and rear aligned. SB3 switchboards are designed for special configurations, such as incoming and outgoing busway connections. The switchboard is designed as a service entrance switchboard. When the main service disconnects, the distribution devices are contained in a single unit