Rockwell Automation 284 ArmorStart User Manual - Manual (Page 29)

Installation and Wiring 2-5
Dimensions for Bulletin 280/281,
Continued Dimensions are shown in millimeters (inches). Dimensions are not
intended to be used for manufacturing purposes. All dimensions are
subject to change.
Figure 2.3 Dimensions for NEMA Type 4X with Conduit Entrance