Product Manual

Installation
Automatic Transfer Switch Owner’s Manual 7
Section 3: Installation
Introduction to Installation
This equipment has been tested at the factory. Installing
the switch includes the following procedures:
• Mounting the enclosure.
• Installing the circuit breakers.
• Connecting power source and load leads.
• Connecting the generator control wiring.
• Connecting branch circuit wiring.
Mounting
Mounting dimensions for the transfer switch enclosure
are in this manual. Enclosures are typically wall-
mounted. See Drawings and Diagrams.
This transfer switch is mounted in a UL type 3R
enclosure. It can be mounted outside or inside and
should be based on the layout of installation,
convenience and proximity to the utility supply and load
center.
Install the transfer switch as close as possible to the
electrical loads that are to be connected to it. Mount the
switch vertically to a rigid supporting structure. To prevent
switch distortion, level all mounting points. If necessary,
use washers behind mounting holes to level the unit.
Installing Breakers
See Figure 3-1 . Insert the tab on the breaker (A) into the
hook on the bus (B). Push the breaker into the bus until it
snaps into place.
Figure 3-1. Installing Breakers
Connecting Power Source and Load Lines
Installation and interconnection diagrams are provided in
this manual. See Drawings and Diagrams.
NOTE:
All installations must comply with national, state and
local codes. It is the responsibility of the installer to perform
an installation that will pass the final electrical inspection.
The utility supply, generator, and customer load
connections are made at the transfer switch mechanism,
inside the switch enclosure.
Conductor sizes must be adequate to handle the
maximum current to which they will be subjected, based
on the 75°C column of tables, charts, etc. used to size
conductors. The installation must comply fully with all
applicable codes, standards and regulations.
All power cables can enter the enclosure through the
knockouts provided. If not using the knockouts, conduit
entry into the enclosure above the level of uninsulated
live parts shall use fittings listed for use in wet locations
to maintain the Type 3R rating.
NOTE: If aluminum conductors are used, apply corrosion
inhibitor to conductors. After tightening terminal lugs,
carefully wipe away any excess corrosion inhibitor.
Tighten terminal lugs to the torque values as noted
Utility Service Circuit Breaker (not supplied) and on
the decal located on the inside of the door. After
tightening terminal lugs, carefully wipe away any excess
corrosion inhibitor.
Connect power source and load conductors to clearly
marked terminal lugs on transfer mechanism as follows:
1. Install a 2-pole, 100 Amp breaker in the main
distribution panel. This will be the utility (normal)
power source for transfer switch.
2. Install a conduit between the main distribution
panel and transfer switch enclosures. Properly
sized power cables can also be installed without
the use of conduit if needed.
000362
A
B
Electrocution. Turn utility and emergency
power supplies to OFF before connecting
power source and load lines. Failure to do so
will result in death or serious injury.
(000116)
DANGER
(000120)
CAUTION
Equipment damage. Verify all conductors are tightened
to the factory specified torque value. Failure to do so
could result in damage to the switch base.