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Installation
1.5
SAFE USE OF TRANSFER
SWITCH
Before installing, operating or servicing this equipment, read the
SAFETY RULES (inside front cover) carefully. Comply strictly
with all SAFETY RULES to prevent accidents and/or damage to
the equipment. The manufacturer recommends that a copy of the
SAFETY RULES are posted near the transfer switch. Also, be sure
to read all instructions and information found on tags, labels and
decals affixed to the equipment.
Three publications that outline the safe use of transfer switches
are the following:
• NFPA 70; National Electrical Code
• NFPA 70E; Standard for Electrical Safety in the Workplace
• UL 1008, STANDARD FOR SAFETY-AUTOMATIC TRANSFER
SWITCHES
It is essential to use the latest version of any standard to ensure
correct and current information.
2.1
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 non-essential loads.
• Connecting "Critical Load" branch circuits to the internal load
center.
• Connecting the utility sensing and transfer relay circuits to the
generator control panel.
• Connecting any auxiliary contact (if needed)
• Testing functions.
2.2
UNPACKING
Carefully unpack the transfer switch. Inspect closely for any dam-
age that might have occurred during shipment. The purchaser
must file with the carrier any claims for loss or damage incurred
while in transit.
Check that all packing material is completely removed from the
switch prior to installation.
4
NOTE:
2.3
MOUNTING
Mounting dimensions for the transfer switch enclosure are in this
manual. Enclosures are typically wall-mounted. See "Installation
Diagram".
Handle transfer switches carefully when
installing. Do not drop the switch. Protect
the switch against impact at all times, and
against construction grit and metal chips.
Never install a transfer switch that has been
damaged.
This transfer switch is mounted in a NEMA 3R aluminum enclo-
sure. 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.
2.4
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 dangerous. Contact with such high volt-
age power supply lines causes extremely
hazardous, possibly lethal, electrical shock.
Wiring diagrams and electrical schematics are provided in this
manual.
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.
Conductor sizes must be adequate to handle the maximum cur-
rent 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.
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 provided. This
is necessary to maintain the NEMA/UL type 3 rating. If mounted
indoors, conduits can enter the enclosure above the knockouts.
If not using the knockouts, entry must be at or below knockouts.
NOTE:
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