Installation Guide

TP-6879 3/15 19Section 1 Installation
1.9.1 Grounding
Ground the generator set. The grounding method must
comply with NEC and local codes. Connect the
grounding strap to the generator set ground lug,
terminal GND inside the controller compartment.
Generator sets are shipped with the generator neutral
bonded (connected) to the generator ground in the
junction box. The requirement for having a bonded
(grounded) neutral or ungrounded neutral is determined
by the type of installation. At installation, the neutral can
be grounded at the generator set or lifted from the
ground stud and isolated if the installation requires an
ungrounded neutral connection at the generator. The
generator set will operate properly with the neutral either
bonded to ground or isolated from ground at the
generator.
Various regulations and site configurations including the
National Electrical Code (NEC), local codes, and the
type of transfer switch used in the application determine
the grounding of the neutral at the generator. NEC
Section 250 is one example that has a very good
explanation of the neutral grounding requirements for
generators.
1.9.2 Electrical Lead Entry
Drill or punch holes in the enclosure for the electrical
conduit in the locations shown in Figure 1-15.
1. 1/2 NPT female fuel inlet
2. Utility voltage electrical lead entry point
3. ATS signal electrical lead entry point
ADV--8539
1
2
3
Figure 1-15 Electrical Lead Entry Locations
1.9.3 Field-Connection Terminal B lock
The generator set is equipped with a field-connection
terminal block located in the air inlet area inside the
junction box. Leads have been factory-installed from the
junction box to the terminal block for easy field wiring.
See Figure 1-16 for terminal block location. Remove the
cover panel for access to the field connections.
tp6879
1. Electrical cover panel
1
Figure 1-16 Field-Connection Terminal Block
Location
See Figure 1-17 for terminal block details. Refer to the
terminal block decal for connections and cable sizes.
Also see the wiring diagram in Section 3.
Route AC leads through flexible conduit. Ensure that the
leads and conduit do not interfere with the operation of
the generator set or obstruct the service areas. Route
low-voltage communication leads through separate
conduit.