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Square D PS 200 amp Bus Plug for Riser Busway
Overview
Square D’s 200 amp, fusible PS bus plug is used in place of a PQ 200 amp bus plug for a vertical, “riser” application.
Background
Square D currently manufacturers the I-Line busway series for a variety of applications. One application is to supply power to a manufacturing floor. In this context the busway is normally hung horizontal to the plant floor.
To pull 125 to 200 amps from horizontally installed I-Line bus duct a PQ 200 amp, fusible bus plug fits the bill.
The drawing above illustrates a common horizontal busway layout. The busway in the drawing is being fed directly from the switchgear, as opposed to a tap box at the start of the run.
Square D 200 amp PQ Bus Plugs for horizontally mounted I-Line bus duct.
However, if the busway is installed vertically, running up through the floors of the building, then a PS style bus plug is required to draw 125 to 200 amps and get fused over-current protection. (A breaker-style I-Line bus plug is another more expensive option).
Square D 200 amp PS Bus Plugs for horizontally mounted I-Line bus duct.
Comparing the PS and PQ Style I-Line Bus Plugs
The 200 amp PS and PQ style bus plugs, while appearing similar are different in their mounting.
The 200 amp PS bus plug has a mounting rack that allows for installation on the vertically hanging riser bus duct.
Additionally, the stabs are rotated 90 degrees, so the body of the bus plug rides along the vertically hanging bus duct.
Square D 200 amp PS Bus Plugs for vertically mounted I-Line Riser bus duct.
Compared to the common PQ 200 amp bus plug...
Square D 200 amp PQ Bus Plugs for horizontally mounted I-Line bus duct.
Both of the bus plugs shown here are reconditioned by Legacy. They are examples of the bus plugs that would be received, if one is required.
Resources
If you have further questions or comments about this article, or want to discuss your application or requirements, please contact us.
Understand bus plug basics with our Bus Plug Buying Guide.
Legacy Industrial Electric LLC specializes in reconditioned busway systems. We can be reached at 248-619-9710, or by email at [email protected].
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