Extron electronic CTL208CM user manual Wall Mounting Site Preparation

Installation, cont’d

UL Requirements for Wall Box Installation

The following Underwriters Laboratories (UL) requirements pertain to the installation of the CTL208CM into a wall or furniture (figure 2-1).

Installation

Cable

Conduit

		H. S	HIF	T
INP	UT	SELECT
			/MAX
		MIN

1	MONITO		ADSP™	Extron
INPUT 2
2	2
AUDIO		R
		WITH

INPUT	1	RGB		Mxi	CTL208CM
	1		478
	AUDIO

Control Module

2.5"	Extron
	RGB 478 Mxi
	Interface

Figure 2-1 — CTL208CM in a four-gang wall box

1.These units are not to be connected to a centralized DC power source or used beyond their rated voltage range.

2.These units must be installed in UL listed junction boxes.

3.These units must be installed with conduit in accordance with the National Electrical Code.

Wall Mounting Site Preparation

The control panel module can be mounted in a wall-mountable four space mini-AAP A/V connector panel (such as a one-gang CPM101) and then set into a wall with either a standard stud- mounted wall box or with a wall mounting bracket (IN9181). The control panel module can also be mounted to any wall- mountable Extron device that incorporates a four space A/V mini-AAP connector panel, such as a three-gang RGB 468 Mxi. See Mini-AAP mounting options in Appendix A, Reference Information, for a partial list of devices that can accept four space mini-AAPs.

Choose a location that allows power cable and serial control cable runs without interference. Allow enough depth for the wall box and the cables. You should install the cables in the wall or furniture, with or without conduits, before installing the mounting bracket or wall box.

The installation must conform to national and local electrical codes and to the equipment’s size requirements.

Installation using a UL listed wall box (available from Extron) is recommended for most mounting options, but the optional wall mounting bracket can be used instead. All wall boxes must be at least 2.5” (6.4 cm) deep.

Before using the wall mounting bracket, verify that the installation conforms to national and local electrical codes.

Prepare the site as follows:

1.	If your wall box or mounting bracket includes a paper
	template, cut out the indicated portions of the template. If
	the wall box or mounting bracket does not include a
	template, use the wall box or bracket itself to size the hole.
2.	Place the template, wall box, or mounting bracket against
	the installation surface, and mark the guidelines for the
	opening on the wall or furniture.
3.	Cut out the wall/furniture material from the marked area.
4.	Check the opening size by inserting the wall box or
	mounting bracket into the opening. The box or bracket
	should fit easily into the opening. Enlarge or smooth the
	edges of the opening if needed.

5a. If you are using a wall box, feed cables through the wall box punch-out holes, and secure them with cable clamps to provide strain relief.

Exposed cable shields (braids or foil) are potential sources of short circuits. Trim back and/or insulate shields with heat shrink (figure 2-2).

Screw

Braided Shield

Cable Clamp Metal Wall Box

Install Cable

Foil Shield

Figure 2-2 — Grounding outer braided and foil shields

To prevent short circuits, the outer foil shield can be cut back to the point where the cable exits the cable clamp. Both braided and foil shields should be connected to an equipment ground at the other end of the cable.

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