Ground And Neutral Connections; Battery Chargers - Kohler 48RCLC Installation Manual

2.3 Ground and Neutral Connections

Ground the generator set. The grounding method must comply with NEC and local codes. Connect the ground to the generator
set ground lug, terminal GRD inside the junction box (see Figure 10). Connect the grounds for utility and low voltage connections
to the ground lugs provided in the customer connection box for those specific connections (see Figure 10).
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 alternator. NEC 2002 Section 250.20 is one example
that has a very good explanation of the neutral grounding requirements for generator sets.
Generator sets are shipped with the generator set neutral attached to the alternator in the junction box. 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 alternator. The generator set will operate properly with the neutral either bonded to ground or isolated from
ground at the alternator.
Upper
panel
Neutral lug
Load lead
access opening
Figure 10 Generator Set Connection

2.4 Battery Chargers

An engine-driven, battery-charging alternator charges the battery whenever the generator set operates. Engine-driven systems
can quickly restore the charge used in a normal cranking cycle.
When the engine is not operating, a very low charge rate from an AC-powered battery charger is usually sufficient to maintain a
full charge on the batteries. The RDC2 controller contains a built-in battery charger to maintain the generator set's engine starting
battery. Be sure to provide AC power for the integral battery charger as instructed in the Power Supply section.
24
Ground (GRD) lug, 120VAC
(utility power) connection leads
Ethernet cable for
OnCue Plus location
(cable not shown)
Divider junction box
RDC2 controller
assembly
Terminal block
GFCI duplex
receptacle
Ground (GRD) lug, low
voltage connection
Engine shutdown
switch ASM
Divider junction box
Grommet, round
Jumper
120VAC (utility
power) connection
leads
GM16155
TP-7203 4/23