Installation manual

8.3.3 Grommets or Plastic Bushings
Leviton requires the installation of protective grommets
or plastic bushings at every SMC knockout. Knockouts
are sized for 1-inch and 1-1/2-inch conduit fittings.
This protection will prevent damage to the cables as
they enter the SMC. Without grommets or bushings,
the insulation on the cable can tear or otherwise be
compromised if it is pulled against the bare steel edge
of the opening.
8.3.4 Cable Entry to the SMC
Cables typically enter and leave from the top of the SMC
(AC power cables, for the AC Power Modules available
on the SMC 280 and 420, enter through two knockouts
on the bottom of the module).
8.3.5 Powering
The Leviton SMC is designed as a distribution device
for low-voltage wiring only. It is not designed for the
installation of standard AC cable or Romex. When
power is required for distribution modules, a Leviton
AC Power Module is installed. The AC Power Module
has the additional benefit of providing surge protection
for the distribution modules.
✍
Take Note: Never wire live AC cable. The circuit must be
disconnected at the power source and confirmed with a
tester. Communications wiring and components should not
be installed during lightning storms or in wet locations
(unless specifically designed for such locations). An installer
should never touch uninsulated wires or terminals unless the
wiring has been disconnected at the network interface. Only
a licensed electrician, or in some cases a home owner, must
connect the AC Power Module.
8.3.6 AC Power Module
The AC Power Module, which fits into an opening at the
bottom of the SMC, consists of two 15 AMP Hospital
Grade Transient Voltage Surge Suppression (TVSS)
outlets inside a steel enclosure. Some features of the
AC Power Module include:
• A green indicator light showing that surge protection
is in effect
• An audible alarm that is set off when the indicator light
flashes, signifying that the receptacle is no longer
offering surge protection. The device continues to
function as a standard AC outlet at its 15 amp rating.
The alarm can be shut off, but it cannot be reset! The
Power Module must be replaced in order to maintain
surge protection.
8.3.7 Installing the AC Power Module
Like any piece of electrical equipment, the AC Power
Module should be installed following all appropriate
electrical codes and safety precautions. These include:
• Running a dedicated 15 amp circuit to the SMC
(some installations might call for two dedicated cir-
cuits depending on the continuation of power to cer-
tain SMC devices in case one circuit is inadvertently
tripped.)
• Using 14/2 or 12/2 Romex
• Being sure that the power to the circuit is off before
wiring the AC Power Module
• Using only copper or copper-clad from the power
source
•Understanding that the AC Power Module cannot act
as a lightning arrestor (it will not survive a direct light-
ning strike)
The accompanying diagram shows the installation of a
Leviton AC Power Module:
1. Remove the large rectangular cover plate at the bot-
tom of the SMC panel
For more information call your Leviton representative or the Leviton Technical Hotline at 800-722-2082
© Copyright 2001 Leviton Manufacturing Co., Inc.
8-4
Installation Manual
8
PRE-WIRE
Installation,
Labeling and
Documentation
Pre-Wire
Installation
Protective caps keep out dirt and
debris during installation