Product Manual

5
INTRODUCTION TO INSTALLATION
This equipment has been wired and tested at the factory. Installing
the switch includes the following procedures:
Mounting the enclosure.•
Connecting power source and load leads.•
Connecting the generator sensing and transfer relay circuits.•
Testing functions; manual and electrical operations.•
UNPACKING
Carefully unpack the load center/transfer switch. Inspect closely
for any damage that might have occurred during shipment.
Check that all packing material is completely removed from the
switch prior to installation.
MOUNTING
Mounting dimensions for the transfer switch enclosure are in
this manual. Enclosures are typically wall-mounted. See the
“Installation Diagram”.
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Handle load centers carefully when installing.
Do not drop. Protect the load center against
impact at all times, and against construction
grit and metal chips. Never install a load center
that has been damaged.
This load center is mounted in a NEMA 1 or NEMA 3R enclosure.
It can be mounted outside (NEMA 3R) or inside (NEMA 1 or 3R)
and should be based on the layout of installation, convenience and
proximity to the utility supply and electrical loads.
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.
NOTE:
It is accepatable to mount the load center with the 200A Service
Disconnect circuit breaker at the bottom of the load center. It
will be necessary to reverse all reference positional callouts in
this manual (left-right and top-bottom).
CONNECTING POWER SOURCE AND
LOAD LINES

 Make sure to turn OFF both the UTILITY
(NORMAL) and GENERATOR (STANDBY)
power supplies before trying to connect power
source and load lines to the transfer switch.
Supply voltages are extremely high and dan-
gerous. Contact with such high voltage power
supply lines causes extremely hazardous, pos-
sibly lethal, electrical shock.
Wiring diagrams and electrical schematics are provided in this
manual.
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 connection is made at the UTILITY SERVICE DIS-
CONNECT circuit breaker terminals. The generator supply connec-
tion is made at the GENERATOR DISCONNECT switch terminals.
The customer load connections are made at the individual 1 or
2-pole circuit breakers, inside the switch enclosure.
Conductor sizes must be adequate to handle the maximum current
to which they will be subjected to, 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.
Before connecting wiring cables to terminals, remove any surface
oxides from the cable ends with a wire brush. All power cables
must enter the enclosure through the knockouts. If not using the
knockouts, entry must be at or below knockouts. If ALUMINUM
conductors are used, apply corrosion inhibitor to conductors.
Tighten terminal lugs to the torque values as noted on the decal
located on the inside of the door. After tightening terminal lugs,
carefully wipe away any excess corrosion inhibitor.
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Use a torque wrench to tighten the conduc-
tors, being sure not to overtighten, or damage
to the insulating base could occur. If not tight-
ened enough, a loose connection would result,
causing excess heat which could damage the
switch base.
Connect power source load conductors to clearly marked transfer
mechanism terminal lugs as follows
1. Connect UTILITY (NORMAL) power source cables to UTILITY
SERVICE DISCONNECT circuit breaker.
2. Connect GENERATOR (STANDBY) source power cables to
GENERATOR DISCONNECT switch.
3. Connect customer LOAD leads to 1 or 2-pole circuit break-
ers.
Installation