APC AR204A User Manual download pdf (Page 13)

9NetShelter Four-Post Rack—Installation

Install Equipment

This section provides information on how to install rack-mount equipment in the NetShelter Four-Post

Rack. The instructions provided with the equipment contain more detailed information.

Identify one U-space on the vertical mounting flange

When installing equipment, locate the top and bottom of a U-space on the mounting flanges. Every third

hole on the mounting flanges of a NetShelter rack is numbered to indicate the middle of a U-space. A U-

space consists of one of these numbered holes and one hole directly above and below it, as shown.

Install cage nuts

APC offers a cage nut hardware kit (AR8100) for use with square holes.

Warning: Install cage nuts horizontally, with the ears engaging the sides of the square

hole. Do NOT install cage nuts vertically with the ears engaging the top and bottom of

the square hole.

1. Insert the cage nut into the square hole by hooking

one ear of the cage nut assembly through the far side

of the hole.

Note: Install the cage nuts on the interior

of the vertical mounting flange.

2. Place the cage nut tool (provided) on the other side

of the cage nut and pull to snap it into position.

Remove cage nuts

1. Remove any attached screw.

2. Grasp the cage nut and squeeze the sides to release it from the square hole.

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APC AR204A User Manual Page 13