Tap boxes are used to feed power into the busway run, connected by pipe and wire from a distribution panel. Electrical power is then delivered to the bus duct with bus plugs tapping into the powered busway.
Legacy stocks and sources reconditioned tap boxes for the major manufacturer's busway series, including older and obsolete systems.
Tap boxes come in a few different types. The most common:
This is the most common. The tap box plugs on to one end of the busway run. A neck extends from a metal housing that encloses the lugs to supply power to the bus bars. The sides remove to allow access to the lugs. Pipe and wire is normally used to supply the power.
Another common tap box solution. The tap box plugs into a port hole opening in plug-in busway. These install like a bus plug (no over-current protection). A plug-in tap box requires two end closures for the busway run. There are a couple of advantages to this style. One is that it can plug in anywhere along the bus run. Two, a plug-in tap box can easily be relocated along the busway line. Third, a plug-in tap box is independent of the busway material (aluminum or copper).
A center tap box allows power to be supplied to the middle of the busway run. center tap boxes access the busway at the joints between two busway sections. This style is available for Westinghouse Lifeline busway and Siemens Bull Dog busway, for a few examples.
Tap Boxes can be used in a wide variety of applications to feed power to the electrical bus duct. But, some situations may require a customized tap box. At Legacy, we have customized tap boxes to fit a variety of different situations.
A busway run is started with a tap box, but it is ended with an end closure, or more commonly referred to as an "end cap". Electrical code (and common sense) requires that the busway be closed to avoid accidents and contamination inside the busway. If an end cable tap box is used, one end closure is required, if a plug-in or center-tap box is used, two end closures will be required.