Operation
36949 B MMG25I-35D-45I-55DF4 Operating Manual 27
VOLTAGE SELECTOR SWITCH
The voltage selector switch mechanically changes the connections between the generator output leads and the
connection lugs on the main control panel. Voltage ranges are selected by rotating the handle on the switch to the
desired voltage.
WARNING
Electric Shock: Never change the voltage selector switch while the engine is running
or the controller is on. If the engine is running or starts while the setting is changed,
severe arcing will occur, which may result in death, serious injury, damage to the
switch and generator windings.
The voltage selector switch is equipped with a lockout mechanism. Once the proper voltage has been selected,
insert a padlock through the lockout hole(s). By locking the handle in place, unauthorized changing of the voltage
setting is prevented.
L1-L2 = 208V L1-N = 120V N =
L2-L3 = 208V L2-N = 120V
L3-L1 = 208V L3-N = 120V
VOLTAGES AT RECEPTACLES
120/208V 3-PHASE
Switch styles vary by model.
RECEPTACLE L-L L-N
GFCI - 120V
GFCI w/Buck - 120V
Twist-locks 208V 120V
277/
480V
120/
208V
120/
240V
00085
VOLTAGES AT RECEPTACLES
277/480V 3-PHASE
Switch styles vary by model.
L1-L2 = 480V L1-N = 277V N =
L2-L3 = 480V L2-N = 277V
L3-L1 = 480V L3-N = 277V
277/
480V
120/
208V
RECEPTACLE L-L L-N
GFCI - 139V
GFCI w/Buck - 120V
Twist-locks 240V 139V
00083
= Not recommended for normal use
L1-L2 = 240V L1-N = 120V N =
L2-L3 = 240V L2-N = 208V
L3-L1 = 240V L3-N = 120V
VOLTAGES AT RECEPTACLES
120/240V 3-PHASE
Switch styles vary by model.
RECEPTACLE L-L L-N
GFCI - 120V
GFCI w/Buck - 120V
Twist-locks 120V 0/120V
120/
240V 3PH
277/
480V
120/
208V
120/
240V
1PH
4 Position Voltage Selector Switch Option
00086
= Not recommended for normal use
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