American Power Conversion AP7610 manual How to Install the PDU, Overview

How to Install the PDU

Overview	Install the AP7610 Rack PDU in the rear, top two U-spaces of a rack or
	enclosure for overhead wiring, or in the rear, bottom two U-spaces for
	under-floor wiring. To install the Rack PDU in a NetShelter® Standard
	Enclosure:
	1. Attach a bracket to each side of the Rack PDU, using the pan-head
	screws.
		Some enclosures may require you to recess the Rack
		PDU so that the back doors of the enclosure will close
	Note	when other devices are plugged in.

For placement flush-to-rack: use four pan-head screws (provided) for each bracket.

For a recessed placement: use two pan-head screws (provided) through the last two holes of the mounting brackets and into the first two holes on the Rack PDU.

4 Rack Power Distribution Unit — AP7610