Generator Output Connections; Fine Voltage Adjustment - Generac Power Systems MAGNUM MMG75D Operating Manual

GENERATOR OUTPUT CONNECTIONS

The unit is equipped with connection lugs, located on the lower portion of the control box behind the lug box door.
The lugs provide connection points for attachment of external loads to the generator. A large decal on the inside of
the connection lug door details the proper connections for selected voltages.
Only a trained and licensed electrician should perform wiring and connections to
unit. Failure to follow proper installation requirements could result in death, serious
Before any connections are made to the generator, make sure that the main circuit
breaker and the Control Power switch are OFF (O). Potentially lethal voltages may be
IMPROPER OR INCORRECT CONNECTIONS TO A BUILDING'S ELECTRICAL SYSTEM
CAN CAUSE POTENTIALLY LETHAL VOLTAGES TO BACKFEED INTO UTILITY LINES.
THIS MAY RESULT IN INJURY OR ELECTROCUTION TO UTILITY WORKERS NEARBY.
MAKE SURE THE GENERATOR IS SUPPLYING POWER TO AN ISOLATED OBJECT
OR BUILDING THAT IS NOT CONNECTED TO ANY UTILITY LINES.
Connections to the lugs should be made by running the power cables up through the opening in the bottom of the
box. 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.
WARNING
Never attempt to disable or
modify the lug door safety
switch(es). Equipment
damage, personal injury or
death could result.
A ground connection 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
will need to be removed when the generator is used as a standby power source. INSTALLATION SHOULD BE IN
COMPLIANCE WITH THE NATIONAL ELECTRICAL CODE (NEC), STATE AND LOCAL REGULATIONS.

FINE VOLTAGE ADJUSTMENT

Adjustment of the output voltage from the generator is necessary to provide the correct voltage to the end of the
power line. Voltage adjustment can be carried out at any time on the Voltage Adjust screen.
33701 C
WARNING
injury, and damage to equipment or property. (000155)
WARNING
present at the generator connection lugs.
MMG75D-100D Operating Manual
DANGER
Run Cables Through Slots
Figure 3-5. Generator Connection Lugs
Operation
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