Electricalsystem; Neutraltoframegrounding; Connectingelectrical Loads; Don't Overloadthe Generator - Generac Power Systems XG4000 Series Owner's Manual

2.5.2 CONNECTING THEGENERATOR T OA BU/LD/NG'S
ELECTRICAL S YSTEM
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 generatorpower from utility power or
other alternativepower sources.
NOTE:
Because the generatorequipment groundis bonded to the AC
neutral wires in the generator(see Figure8), either a 3-pole
transferswitchor a 2 pole transferswitchwith a switching
neutral kit is requiredto connectthis generator to a building
load. In this application the generator becomes a separately
derived system (see NEC250.20 (D)), and mustbe grounded
in accordancewith the nationalor local electrical code
requirements.
Grounding theGenerator ina BuildingStandby Application
The National Electrical Code requires that the frame and
external electrically conductive parts of this generator be
properlyconnected to an approvedearth 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 preventelectrical
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 H ERE
2.5.3 NEUTRALTOFRAMEGROUNDING
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 generatorafter
alternatorservice work is done (Figure8).
Figure 8 - Neutral to FrameGround Wires
DONOTDISCARD
THESE WIRES!
NEUTRAL TO
FRAME GROUND
//_Failure to reconnect these wires may create a
potential shock hazard when the generator is
running!
2.5.4 CONNECtiNG ELECTR/CAL LOADS
DO NOTconnect 240 Volt loadsto 120 Volt receptacles.
DO NOTconnect 3 phaseloads to the generator.
DO NOTconnect 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 ratedwatts (or amps) of all loadsto be connected
at one time. This total should no be greaterthan (a) the rated
wattage/amperage capacity of the generator or (b) circuit
breakerrating of the receptaclesupplyingthe power.See "Don't
Overloadthe Generator
2.6 DON'T OVERLOAD THEGENERATOR
Overloadinga generator in excess of its rated wattage capacity
can result in damageto the generatorand to connectedelectrical
devices. Observethe following to preventoverloadingthe unit:
* Add up the total wattageof all electricaldevicesto be connected
at one time. This total should NOT be greater than the
generator'swattage capacity.
* The ratedwattage 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 affixedto the device.
* If the appliance,tool or motor does not give wattage, multiply
volts times ampererating to determinewatts (volts x amps =
watts).