Onan Ensign 4500 User Manual

Grounding
Onan marine generator sets require the batteries con-
nected negative ground. Most propulsion engines and
vessel electrical equipment have negative ground
systems.
BATTERY ACCEPTABLE BATTERY
+ f
7 w-
0--
The generator set and propulsion engineh must be
grounded in accordance with
USCG regulation
33CFR183.415. The regulation requires a common ground
conductor connected between the generator set and pro-
pulsion engine cranking motor circuits. The conductor
must be the same size as the largest battery cable. See
Figure
8-7.
COMMON CONDUCTOR SAME
SIZE AS BATTERY CABLE
d
\
The conductor prevents accidental passage of cranking
current through the
fuel systems and smaller electrical
conductors common to
the engines. This can happen if a
cranking motor ground circuit becomes resistive or opens
from corrosion, vibration, bad cable, etc.
GENERATOR SET
rmpmper gtwnd can cause seven?
l3BHSl persona/ iniury or death trom fire or
explosion. Besun, to installa commongrrxrndconductor
hiween
all on bead cranking circuiis.
Do not connect the battery negative lead to the generator
set at a location other than shown in Figure 8-6.
PROPULSION ENGINE
I
FIGURE 8-7. COMMON GROUND CONDUCTOR
Bonding
The generator set must be bonded to the vessel common
bonding conductor with a bonding strap as shown in Fig-
ure 8-8.
If a metallic fuel line is installed between the fuel
tank and the generator set shutoff valve, it too must be
bonded to the same vessel common conductor.
COMMON BONDING
CONDUCTOR Es.1891-I
FIGURE 8-8. BONDING CONNECTlONS
8-6

Onan Ensign 4500 Specifications

General

Brand	Onan
Model	Ensign 4500
Category	Portable Generator
Language	English