Product Manual

Owner’s Manual for MDG25IF4 27
Operation
The installation should be in compliance with the national
electrical code (NEC), state, and local regulations.
See Figure 3-7. The unit is equipped with connection
lugs (A), located on the lower portion of the control box
behind the lug box door. The lugs provide connection
points to attach external loads to the generator. A large
decal on the inside of the connection lug door details the
proper connections for selected voltages.
Connections to the lugs should be made by running the
power cables up through the opening in the bottom of the
box.
IMPORTANT NOTE: Do not make any connections
directly to the lugs without routing the cables
through the opening. Use a hex-wrench to tighten the
cable connections.
The connection lug door is equipped with safety interlock
switches that will trip the main circuit breaker and disable
the voltage regulator if the door is opened while the unit
is operating.
A ground connection (B) is located next to the connection
lugs. The unit must be connected to ground for proper
operating safety. The generator neutral is bonded to
ground when it is shipped from the factory. The bonding
plate must be removed when the generator is used as a
standby power source.
Figure 3-7. Generator Connection Lugs
Generator Cam Lock
Connections (If Equipped)
See Figure 3-8. The unit may be equipped with cam lock
connections (A) located below the receptacles. These
receptacles provide connection points to attach external
loads to the generator. A decal below the cam lock
connections details the proper connections for selected
voltages.
Connections should be made by plugging power cables
equipped with series 16 taper nose 400A/600V cam lock
plugs into the cam lock receptacles. Secure the
connection by rotating the plug a 1/2 turn to the right.
Figure 3-8. Cam Lock Connections
(000156)
DANGER
Electrocution. Before connections are made to
the unit, verify the main circuit breaker and
battery disconnect switch are OFF. Failure to do
so will result in death or serious injury.
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure
to follow proper installation requirements could result in
death, serious injury, and equipment or property damage.
007618
B
A
(000156)
DANGER
Electrocution. Before connections are made to
the unit, verify the main circuit breaker and
battery disconnect switch are OFF. Failure to do
so will result in death or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
WARNING
Electric Shock. Verify all connections to the
cam lock receptacles are made to one side
only. Failure to do so could result in death,
serious injury and property damage.
(000308)
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure
to follow proper installation requirements could result in
death, serious injury, and equipment or property damage.
L1
L2
L3
N (Neutral)
G (Ground)
Black
Red
Blue
White
Green
007619
A