8
OPM-135/C
E: 120V/20 AMP DUPLEX RECEPTACLE:
This convenience receptacle is used to power both battery
charger and block heater. This circuit must be fed from a
GFCI fused circuit in the distribution panel.
F: NEUTRAL TO GROUND LEAD LUG:
This lug is provided on the neutral terminal block to allow
you to run a neutral to ground lead if you are using the
generator in a stand alone application. This would be an
application where there is not a distribution panel and
no other ground to neutral bond in the wiring system. If
a grounding wire is attached here, remove the floating
neutral label in the panel. This will not be used when you
are wiring a generator and transfer switch into an existing
power system.
WARNING:
A mainline circuit breaker has been provided inside the
generator housing. During all wiring installations, make
sure the breaker is in the OFF position and the generator
operating switch is in the OFF position.
WARNING: EQUIPMENT DAMAGE:
When installing a three-phase 240 Volt system, be sure you
know which lead is the high voltage “wild” leg (208 Volt
line to neutral). The generator normally carries the high
voltage on the G2 lead.
All wires should be installed in rigid or flexible conduit
(knockouts are provided in the control box).
GROUNDING
A grounding lug has been provided on the engine
generator set and the generator set must be properly
grounded to good earth ground. Generally an 8 foot
copper rod driven into the earth will provide a proper earth
ground.
D.C. ELECTRICAL CONNECTIONS
All DC connections are completed on the terminal strip
just below the engine control. All DC connection must be
separate conduit. You cannot mix AC and DC leads at the
same conduit.
CONNECTION BOX TERMINALS
To install the wires, reference the following picture. Use a
small flat head screwdriver to push the release spring inside
the square hole (A). While the release is being pushed,
insert the wire into the larger circular hole (B). Remove the
screwdriver to secure the wire into place.
A
B
A.C. ELECTRICAL CONNECTIONS
NOTICE: CLASS 1 WIRING METHODS ARE TO BE USED FOR
ALL FIELD WIRING CONNECTIONS TO TERMINALS OF A
CLASS 2 CIRCUIT
WARNING:
A mainline circuit breaker has been provided inside the
generator housing. During all wiring installation, make
sure the breaker is in the off position and the generator is
disabled.
WARNING:
Make sure the generator is disconnected from the battery to
prevent accidental starting.
The connection box shown are typical arrangements.
A. NEUTRAL LUGS:
These lugs are isolated from ground and provided for you
to connect your neutral wire from the transfer switch to the
generator.
The 225 Amp terminal block lugs will handle wire size #4 to
300 MCM and should be torqued to 250 in. lbs.
B. GENERATOR CIRCUIT BREAKER:
This circuit breaker provides overload protection for the
generator. Your power feeds from the transfer switch
will connect the bottom lugs on the circuit breaker. The
generator power feeds have already been wired into the
upper lugs.
Please refer to the circuit breaker installed on your unit for
breaker lug capacities and proper toque specifications.
To select the proper conductor size between the generator
and the ATS, first look your model up in Table 1 of Appendix
“A” for your generator amperage, found further in this
manual. Then refer to Appendix “2” for guidance on wire
sizing based on both wire type and amperage.
For additional information on wire sizes, refer to table 310-
16 of the National Electrical Code ANSI/NFPA 70.
C. GROUND LUG:
These ground lugs are bonded to ground and are provided
for you to connect your ground wire from the transfer
switch to. The lugs will accommodate #10 AWG to 2/0
AWG and should be torqued to 200 in. lbs.
D: 120V GFCI CIRCUIT TERMINAL BLOCK:
These terminals are rated for 85 Amps and will handle wire
sizes #4 AWG to 18AWG. They should be torqued to 16
in. lbs. This circuit must be fed from a fused circuit in the
distribution panel and provides power for the block heater
and the battery charger.