Extron Electronics MKP 3000 Series - Manual (Page 11)

MKP 3000 Series • Installation MKP 3000 Series • Installation
Installation, cont’d
4 . Check the opening size by inserting the wall box, mud
ring, or control panel into the opening. The box or mud
ring and/or control panel should fit easily into the
opening. Enlarge or smooth the edges of the opening if
needed.
5 . If you are using a wall box , feed the cables through the
wall box punch-out holes, and secure them with cable
clamps to provide strain relief.
6 . Exposed cable shields (braids or foil) are potential sources
of short circuits. Trim back and/or insulate shields with
heat shrink (figure 2-2).
Installation
Cable
Cable
Clamp
Wall Stud
Foil
Shield
Screws or Nails
Screw
Braided
Shield
Figure 2-2 — Grounding 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.
7 . If you are using a mud ring , follow the directions, if any,
that came with the mud ring to attach the clips that fasten
it to the wall or furniture (figure 2-3).
To meet UL listing requirements, the MKP must be
installed in a wall box.
2-5
UL requirements for wall box installation
The following UL requirements pertain to the installation of the
MKP 3000 into a wall (figure 2-1) or furniture.
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.
Installing a mounting bracket (mud ring) or wall
box
Extron recommends using a UL listed wall box (available from
Extron) for most mounting options, but you can use the
included mounting brackets (mud rings) instead.
Before using the mud rings, verify that the installation
conforms to national and local electrical codes.
The electrical box must be at least 2.5" (7 cm) deep to
accommodate the MKP’s rear enclosure.
Install the mud ring or wall box as follows:
1 . If you are using a mud ring , use the template that came
with the mud ring. Cut out the indicated center portion.
To meet the UL listing requirements, the MKP must be
installed in a wall box.
If you are using a wall box , refer to the cut-out template
in appendix A that corresponds to the faceplate you are
using, and cut out the center portion of it as indicated on
the template.
CAUTION Extron provides one mud ring with each MKP
control panel. However, the user may choose to use
a wall box. Because the tolerances on electrical
boxes are very loose, Extron recommends that you
measure the actual box that you plan to use before
making any precise cuts.
2 . Use the template (or place the wall box or mud ring
against the installation surface), and mark the guidelines
for the opening on the wall or furniture.
3 . Cut out the wall material from the marked area.
2-4