Generac Power Systems 4270-0 - Manual (Page 32)

INSTALLATION
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Section 2 - Installation
QUIETPACT™ 75D Recreational Vehicle Generator
• Use exhaust system parts recommended by
Generac. Using unapproved exhaust mufflers and
exhaust system parts is the responsibility of the
person(s) installing such unauthorized parts.
• Do not terminate the exhaust system under any
opening, window or vent that can be opened or is
not permanently sealed from the vehicle interior.
• Exhaust piping must be large enough to prevent
excessive back pressure on the generator engine.
• Never tee the generator engine exhaust pipe into
the vehicle engine exhaust piping. This causes
excessive back pressure on the generator engine.
Also, water from one engine can damage the
other engine.
• Plan exhaust system installation carefully.
Comply with all applicable codes, standards and
regulations.
2.6 ELEaRICAL CONNEQIONS
Be sure to read Section 1.6 on Page 20.
The following general rules apply to electrical con­
nections in a recreational vehicle:
• Qualified electricians who are familiar with applic­
able codes, standards and regulations should
Install electrical wiring.
• The wiring should comply with codes, standards
and regulations. The National Electrical Code
(NFPA 70), and state and local codes apply.
• Switches and circuit breakers should be of a type
approved for use in recreational vehicles and must
be mounted and installed to prevent damage from
road shock.
• Wiring must be of adequate size, have approved
Insulative qualities and be properly supported.
• Conduit and wire openings into the generator com­
partment (if used) must be vapor-sealed to prevent
entry of flammable, explosive or poisonous gases
into the vehicle.
• 2.6.1 ELEaRICAL JUNQION BOX______________ _
Install an approved, square electrical junction box
with a blank cover on the Interior or exterior wall of
the area you plan to Install the generator (NOT on the
generator). Route the generator's AC output leads
into this junction box through approved flexible con­
duit. This is the point of first termination for genera­
tor AC output leads.
• 2.6.2 WIRING______________________________
• Wiring should be of stranded copper to reduce the
chance that vibration may cause breakage.
• Wire gauge size should be large enough to handle
at least 115 percent of the installed generator's
rated maximum current.
30 Generac* Power Systems, Inc.
• If neutral conductors are used, they must be the
same size as other leg wires.
• Route power supply conductors from generator AC
output leads T1 (red), T2 (white), T3 (black) and
the green ground wire through approved flexible
conduit to the electrical junction box on the com­
partment wall.
If flexible metal conduit is used between the genera­
tor and the compartment junction box, the conduit
end that terminates the compartment junction box
must be vapor-sealed. Flexible metal conduit is NOT
vapor tight along its entire length.
• From the jimctlon box, route power supply wires
through approved conduit to either (a) double-pole,
double-throw transfer switch, or (b) approved isola­
tion receptacle. Connecting to a transfer switch or
isolation receptacle must prevent vehicle electrical
circuits from being connected to two different power
supplies at the same time (such as generator and
dockside power).
• Conductors must be rated 221° F (105° C) or must
be of a larger conductor size.
• 2.6.3 GENERATOR AC CONNECTIONS_______________
Generator AC output leads T1 (red), T2 (white) and
T3 (black) come out of the generator as shown in
Figure 2.14. Leads T1 (red) and T3 (black) are “hot,”
while T2 (white) is the grounded neutral lead. There
is also a green lead that connects to ground in the
junction box of the recreational vehicle.
Figure 2.14 - Generator AC Output Leads
QUIETPACT generators use a four-position terminal
block to connect between stator power leads and vehi­
cle load leads. This terminal block is accessible by
removing the access panel shown in Figure 2.14. Units
are shipped from the factory connected for dual voltage
(120/240 volts AC) output (See Figure 2.15). The stator
power windings are connected in series. Lead 11/1 lA
connects to T1 (Red), lead 44/44A connects to T3
(Black), while leads 22 and 33 are grounded and con­
nect to T2 NEUTRiAL (White). A "tie bar" connects the
two switch handles on line breaker CBl.