Installation; Introduction To Installation; Unpacking; Mounting - Generac Power Systems RTS Series Owner's Manual

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 utility and generator power source leads.
• Connecting the load leads.
• Connecting any auxiliary contact (if needed)
• Installing/connecting any options and accessories.
• 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.
2.3

MOUNTING

Mounting dimensions for the transfer switch enclosure are in this
manual. See the "Mounting Dimensions" drawing.
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.
Install the transfer switch as close as possible to the electrical
loads that are to be connected to it. The switch enclosure is suit-
able for wall or floor mounting. For wall mounting, remove the
floor stands to gain access to the mounting points on the bottom
of the enclosure. Mount the switch vertically to a rigid supporting
structure. For floor mounting, place switch enclosure on a hard,
level surface. Secure enclosure to the floor. 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 EMERGENCY (Standby genera-
tor) 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. Power source and load connections are made at the
transfer mechanism, inside the switch enclosure.

2.4.1 3-POLE MECHANISM

These switches (Figure 2.1) are used with a three phase system,
when the three phase NEUTRAL line is to be connected to a
NEUTRAL lug and is not to be switched.
Figure 2.1 — Typical 3-Pole Transfer Mechanism
(800 Amp Shown)
Solderless, screw-type terminal lugs are standard.
The conductor size range is as follows:
Switch Rating
600A
800A
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
should enter the switch next to transfer mechanism terminals.
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.
All power cables should enter the switch next to the transfer
mechanism terminals.
Use a torque wrench to tighten the conduc-

tors, being sure not to overtighten, or dam-
age to the switch base could occur. If under-
tightened, a loose connection would result,
causing excess heat which could damage
the switch base.
Installation
Wire Range
2 x 1/0-500 MCM per pole
4 x 4/0-500 MCM per pole
3