Installation manual

8-8
For more information call your Leviton representative or the Leviton Technical Hotline at 800-722-2082
© Copyright 2001 Leviton Manufacturing Co., Inc.
Installation Manual
Leviton recommends the following materials for cable
installations:
• J-hooks and similar cable supports instead of staples
for supporting cable along joists
• Cable clamps on individual cable runs
•Velcro‚ tie wraps and cable straps for wrapping mul-
tiple cables and for securing cable to studs (Leviton
SoftCinch‚ or equivalent)
• Leviton Cable Joe‚ Clamp-on Cable Router for
smoothly routing up to 20 cables around corners with-
out damage
Standard staples are not recommended. The methods
recommended here are more forgiving. The cost of time
spent tracing down and replacing one damaged cable
will surpass any lower material expense or labor cost
saved by using less expensive staples.
Installer’s Tip: An insulated staple is an ideal fastener
for low-voltage wiring. The insulation acts as a built-in
stop that prevents the staple from crushing or stress-
ing the cables. Be sure the cable diameter does not
exceed the staple’s capacity.
Pulling Low-Voltage Wiring Through Wood and Metal
Framing Members
Like standard AC cable, low-voltage wiring will run
through holes in wall studs, floor joists, and rafters.
Leviton recommends a minimum 1" diameter drill hole
in framing members for running low-voltage cable. This
allows for bundling multiple wires without constriction
and reduces pulling stress in the cables. Although NEC
rulings for protecting electrical cable apply to AC con-
ductors, structured cable systems can be protected
the same way. These rulings state:
• Cable running through framing members must be
1 1/4" or further from the nearest edge of that framing
member (Section 300-4[a][1] and [2] )
• If a cable cannot meet the 1 1/4" rule, it must be pro-
tected by a steel nailing plate attached to the edge
of the framing member
•Cable running in intermediate and rigid metal con-
duit, rigid nonmetallic conduit, and electrical metallic
tubing is exempt from the 1 1/4" rule
•Cable running through metal framing members must
be protected by a bushing or grommet unless the
cable is running inside conduit
8
PRE-WIRE
Installation,
Labeling and
Documentation
Pre-Wire
Installation
Use j-hooks or similar devices designed to support cables.
Staples by hand, or
use staplers with
depth stops.
Use Velcro® to keep
cables from becom-
ing over-cinched.
Use tie wraps
loosely on large
bundles. (See
‘Using Tie-wraps’)
Use Velcro® tie wraps and cable straps to secure large bundles.
DO NOT SHARE STUD SPACE
WITH ELECTRICAL POWER
STEEL NAILING PLATES
WALL PHONE OUTLET
BOXES ARE 48 INCHES
(122 T)
(0 32 CM)
FROM FLOOR
IF POWER
MUST BE
CROSSED,
CROSS AT
90 DEGREES
USE PLASTIC NM-TYPE
STAPLES AND LEAVE WIRE
LOOSE INSIDE STAPLE
DO NOT SHARE BORE
HOLES WITH POWER