4-8
OIL DRAIN
Extend the drain to suit the installation. The oil base has
a 1/2-inch pipe size tapped hole.
Do not position the oil drain so that oil
might drip onto the muffler, any exhaust compo-
nents, or any other hot parts, causing a fire hazard.
Fire presents the hazard of severe personal injury or
death.
ELECTRICAL CONNECTIONS
The nameplate on the genset lists its electrical output rat-
ing in watts, volts, and hertz. The wiring diagram,
shipped with the set, depicts the electrical circuits and
connections for installation.
All electrical connections should be made by an electri-
cian or a qualified Onan technician, to meet the local
electrical code requirements.
Electrical shock can cause severe per-
sonal injury or death. Do not touch electrical wiring
or components during testing. Disconnect electrical
power by removing starting battery negative (-) cable
before handling electrical wiring or components.
Load Wires
The control box (junction box) has knockout sections to
accommodate load wires. Use flexible conduit and
stranded load wires near the set, to isolate vibration. Use
the correct size insulated wires for the load rating ap-
plied.
Connect each load wire to the proper generator output
lead inside the control box. Insulate the bare ends of the
ungrounded wires. Use the bolt provided on the control
box to connect the generator ground lead or earth wire.
Install a fused main switch (or circuit breaker) between
the generator and the load. If a test run indicates the
wrong rotation of 3-phase motors in the load circuit,
switch the connections at any two of the generator termi-
nals.
Electrical shock can cause severe per-
sonal injury or death. Check voltage at the nearest
junction box to be sure power has been discon-
nected before disconnecting load wires.
An excessive electrical load can dam-
age the generator windings. Divide loads equally be-
tween the output leads to prevent generator damage.
Standby
If the genset is being installed for standby service, add a
manual or automatic double-throw transfer switch to
avoid feeding generator output into the normal power
source lines, and to prevent commercial power and gen-
erator output from being connected to the load at the
same time. See the transfer switch installation manual
for connection instructions. Also see Figure 4-8.
FIGURE 4-8. LOAD TRANSFER SWITCH
(TYPICAL FUNCTION)
SC1101
LINE
LOAD
GEN
BALANCING LOADS
Electrical shock can cause severe per-
sonal injury or death. Do not touch electrical wiring
or components during testing. Disconnect electrical
power by removing starting battery negative (-) cable
before handling electrical wiring or components.
120/240 Volt, Single Phase:
Terminal connection L0
(neutral) may be grounded, if required. For 120 volts,
connect the hot load wires to either the L1 or L2 connec-
tion, Figure 4-9. Connect the neutral load wire to the L0
connection. Two 120 volt circuits are thus made avail-
able, with not more than 1/2 the rated capacity of the set
available on either circuit. If using both circuits, be sure to
balance the load between them.
