## 2.4 Rack Requirements

The equipment meets the EIA standard and can be installed in a 19-inch rack. If you want to install the switch in a rack, make sure that the rack observes the following requirements:

(1) Use a four-post 19-inch cabinet.

(2) The left and right square-hole rack posts are 465 mm (18.31 in.) apart.

Figure2-2 19-Inch Rack

(3) The square-hole rack post is at least 180 mm (7.09 in.) from the front door, and the front door is at most 25 mm (0.98 in.) thick. This ensures an available clearance of at least 155 mm (6.10 in.). The rack depth (distance between front and rear doors) is at least 1000 mm (39.37 in.).

(4) The guide rails or tray can bear the weight of the equipment and its accessories.

(5) The rack has a reliable grounding lug for the chassis to connect to earth ground.

(6) The rack has a reliable ventilation system. The open area of front and rear doors is greater than 50%.