Installation Manual

Page 4

(800)-321-2343 www.onqlegrand.com

IV. System Wiring Overview

A. Pre-Wiring (Rough-In)

The rough-in of the Selective Call Intercom System should be completed during the construction

phase of the home and prior to the installation of drywall. The following section will instruct you on

the proper methods to pre-wire your cable and rough-in the openings for the various Selective

Call Intercom System components.

Selective Call Room Unit(s)

The procedure to rough-in the Selective Call Room Unit(s) is as follows:

• Typically the Room Unit(s) will be installed on the same wall as the door to the room. Verify

each Room Unit location with the homeowner before proceeding. Avoid installing Room Units in

the same stud cavity on opposite sides of the wall to prevent feedback problems. If Room Units

must be mounted back-to-back, place insulation in the back of both electrical boxes.

• The Room Unit mounts in a standard 2 gang electrical box. The use of an enclosed box rather

than an open mud ring will help minimize the potential for feedback between units.

• Any UL approved metal or plastic gang box can be used.

• To avoid damage from debris during construction or after construction, use a gang box that will

completely enclose the unit.

• To provide optimal display quality of the LCD on the Room Unit, the bottom of the 2 gang box

should be installed at a height of 56” (see Figure 2).

• ONE Cat 5e run is required to operate the Room Unit.

• Run ONE Cat 5e cable from the 2 gang box directly to the enclosure where the Intercom

Distribution Module will be installed. Label both ends of your cable run to indicate Room Unit

number (ex: “Room Unit 5). Follow the wiring guidelines listed in this manual to ensure a quality

cable installation.

Figure 4