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Operation
2.5.2 CONNECTING THE GENERATOR TO A BUILDING'S
ELECTRICAL SYSTEM
Connections for standby power to a building's electrical system
must be made by a qualified electrician and in strict compliance
with all national and local electrical codes and laws. The
connection must isolate the generator power from utility power or
other alternative power sources.
Because the generator equipment ground is bonded to the AC
neutral wires in the generator (see Figure 8), either a 3-pole
transfer switch or a 2 pole transfer switch with a switching
neutral kit is required to connect this generator to a building
load. In this application the generator becomes a separately
derived system (see NEC 250.20 (D)), and must be grounded
in accordance with the national or local electrical code
requirements.
Grounding the Generator in a Building Standby Application
The National Electrical Code requires that the frame and
external electrically conductive parts of this generator be
properly connected to an approved earth ground (Figure 7).
Local electrical codes also require grounding of the unit. For
that purpose, connecting a No. 10 AWG (American Wire Gauge)
stranded copper wire to the grounding lug and to an earth-driven
copper or brass grounding rod (electrode) provides adequate
protection against electrical shock. However, local codes may
vary widely. Consult with a local electrician for grounding
requirements in the area.
Proper grounding of the generator will help prevent electrical
shock in the event of a ground fault condition in the generator
or in connected electrical devices. Proper grounding also helps
dissipate static electricity, which often builds up in ungrounded
devices.
Figure 7 - Grounding the Generator
CONNECT GENERATOR GROUND HERE
2.5.3 NEUTRAL TO FRAME GROUNDING
If service work is performed on the alternator, DO NOT discard
the white jumper wires from the terminal block to the alternator
ground, located on the rear bearing carrier. Always make sure
the wires are properly connected before using the generator after
alternator service work is done (Figure 8).
8
NOTE:
Figure 8 - Neutral to Frame Ground Wires
Failure to reconnect these wires may create a
potential shock hazard when the generator is
running!
2.5.4 CONNECTING ELECTRICAL LOADS
DO NOT connect 240 Volt loads to 120 Volt receptacles.
DO NOT connect 3 phase loads to the generator.
DO NOT connect 50 Hz loads to the generator.
• Let engine stabilize and warm up for a few minutes after
starting.
• Plug in and turn on the desired 120 or 240 Volt AC, single
phase, 60 Hz electrical loads.
• Add up the rated watts (or amps) of all loads to be connected
at one time. This total should no be greater than (a) the rated
wattage/amperage capacity of the generator or (b) circuit
breaker rating of the receptacle supplying the power. See "Don't
Overload the Generator
2.6 DON'T OVERLOAD THE GENERATOR
Overloading a generator in excess of its rated wattage capacity
can result in damage to the generator and to connected electrical
devices. Observe the following to prevent overloading the unit:
• Add up the total wattage of all electrical devices to be connected
at one time. This total should NOT be greater than the
generator's wattage capacity.
• The rated wattage of lights can be taken from light bulbs. The
rated wattage of tools, appliances and motors can usually be
found on a data label or decal affixed to the device.
• If the appliance, tool or motor does not give wattage, multiply
volts times ampere rating to determine watts (volts x amps =
watts).
DO NOT DISCARD
THESE WIRES!
NEUTRAL TO
FRAME GROUND
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