Owner manual

Generac
®
Power Systems, Inc. 31
6.7.1 ELECTRICAL JUNCTION BOX
Install an approved, square electrical junction box
with a blank cover on the interior or exterior wall of
the area planned for installation of the generator
(NOT on the generator). Route the generator's AC out-
put leads into this junction box through approved
flexible conduit. This is the point of first termination
for generator AC output leads.
6.7.2 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.
• 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 gener-
ator and the compartment junction box, the con-
duit end that terminates the compartment junction
box must be vapor-sealed. Flexible metal conduit
is NOT vapor tight along its entire length.
• From the junction box, route power supply wires
through approved conduit to either (a) double-
pole, double-throw transfer switch, or (b)
approved isolation receptacle. Connecting to a
transfer switch or isolation receptacle must pre-
vent vehicle electrical circuits from being connect-
ed 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.
6.7.3 GENERATOR AC CONNECTIONS
Generator AC output leads T1 (red), T2 (white) and
T3 (black) come out of the generator as shown in
Figure 6.14. 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.
Line T1 (red) to T2 (white) is protected against over-
load by a circuit breaker (CB1). Use this line-to-neu-
tral connection separately to operate 120-volt, single-
phase, 60 Hertz, AC loads. Line T3 (black) to T2
(white) also is protected against overload by a circuit
breaker (CB2). Use this line-to-neutral connection
separately to operate similar loads. However, be sure
the total unit load does not exceed the maximum rat-
ing of the generator. The neutral line (T2, white) on
all units is a grounded neutral.
Figure 6.14 – Generator AC Output Leads
Do NOT connect electrical loads in excess of
any circuit breaker rating or problems will
develop with circuit breaker tripping, which
causes a loss of AC output. Also, do NOT
exceed the generator's rated wattage capacity.
Add the watts or amperes of all lighting, appli-
ance, tool and motor loads the generator will
operate at one time. This total should be less
than the unit's rated wattage/amperage capaci-
ty.
6.7.4 CONDUIT
Route the connections between the generator and the
junction box through approved, flexible conduit. The
following general rules apply:
• Cut wiring to the required length and allow extra
wire for junction box connections.
• Carefully prepare conduit ends to prevent sharp
edges from cutting through wiring insulation.
• Route conduit so it does not interfere with genera-
tor movement.
• If using metallic conduit, vapor seal the end of the
conduit where it enters the junction box. Do this
because flexible metallic conduit is not vaporproof
along its entire length.
6.7.5 ISOLATING DIFFERENT POWER
SOURCES
Connections from the junction box must terminate in
a double-pole, double-throw transfer switch (Figure
6.15, page 33). An alternate method for isolating dif-
ferent power sources is by using an isolating recepta-
cle (Figure 6.16, page 33). Whichever method is used,
be certain that both power sources are NOT connect-
ed at the same time.
◆
◆
T3
T2
T1
Green
(Ground)
◆
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Section 6 – Installation
QUIETPACT 55, 65, and 75 Recreational Vehicle Generators