Install Manual

Electrical Connections
Installation Guidelines for 60 Hz Air-Cooled Generators 29
Section 6: Electrical Connections
Generator Connections
See Figure 6-1. The electrical wiring enclosure is located
behind an access panel on intake end of unit. Remove
intake side panel as directed in Intake Side Panel
Removal, and then remove access panel. Connect wires
according to diagram and tables.
1. Remove main AC / control wiring knock-out plugs
from back of generator.
2. Using appropriate wiring hole, install conduit and
main AC and control wires between generator and
transfer switch.
3. Close unused hole with a NEMA 3R rated plug
(field-supplied).
NOTE: All conductors are to be rated for minimum 300V.
Control system interconnections may consist of N1, N2,
and T1, and leads 23 and 194. All of the generator con-
trol wiring circuits are Class 1 remote control or signaling
circuits. Class 1 circuits are required to be installed in
accordance with Part 1 of NEC Article 300 and with a
NEC recognized Chapter 3 wiring method. The use of
low voltage cables for the generator control circuit wiring
is prohibited. See instruction manual of the specific
engine generator for wiring connection details. Recom-
mended wire gauge sizes for this wiring depends on wire
length, as recommended in Table 6-3.
Exception: Conductors of AC and DC circuits, rated
1000 volts nominal or less, shall be permitted to occupy
the same equipment, cable, or conduit. All conductors
shall have an insulation rating equal to at least the maxi-
mum circuit voltage applied to any conductor within the
equipment, cable, or conduit. See NEC 300.3(C)(1).
4. See Figure 6-1. Strip insulation from wire ends. Do
not remove excessive insulation. Route sense
wires through supplied wire tie (C1), and connect
to sense wire terminal block (B). Push down on
spring loaded connection point with a flat head
screwdriver, insert wire, and release.
5. Using the same process, route control wires
through second supplied wire tie (C2), and connect
to control wire terminal block (A).
6. When all wires are securely connected to correct
terminals, tighten wire ties and clip excess length.
NOTE: Only bare wire should be inserted into each ter-
minal. Do not insert any wire insulation into terminals.
NOTE: Damage caused by mis-wiring of the intercon-
nect wires is not warrantable.