Samlexpower G4-2012A Owner's Manual page 32

SECTION 5 |
Please see Fig. 5.9 (page 27) showing the AC side layout and connection
arrangement of the unit. The terminals are marked as follows:
• The AC input terminals are marked "HOT IN" (9) for the Line Input
and "NEU IN" (10) for the Neutral Input.
• The AC output terminals are marked "HOT OUT" (14) for the Line
Output and "NEU OUT" (13) for the Neutral Output.
• The "Equipment Grounding Connections" are marked "GND IN"
(11) for the Equipment Grounding Conductor from the utility /
generator and "GND OUT" (12) for the Equipment Grounding
Conductor to the AC Load Center/AC Sub-Panel.
GFCI Protection for Vehicle Application
When this unit is installed in vehicles, ensure that Ground Fault Circuit
Interrupter(s) are installed in the vehicle wiring system to protect all branch
circuits. Details of tested and approved GFCI's are given in Fig 5.14
(page 36). Installation requirements are shown in Fig. 5.14 on page 36.
Sizes of AC Input , AC output Wiring
The type of the wire should be suitable for the application – residential,
Rv or marine.
The units are provided with built-in breaker marked "Charger" for over-
current protection on the AC input and output sides. The ampacity of AC
wiring has to match the current rating of the breaker. Sizing is based on
UL1741 (Section 16.1.3 and Table 66.3) and 75°C / 167°F temperature
rating column of NEC-2011 Table 310.15(B)(16) for wiring installed in
conduit. Wiring with higher conductor temperature rating of 90°C /
194°F may be used but wire sizing has to be based on 75°C / 167°F
temperature rating column of the above NEC Table. Table 5.2 below
specifies the sizes of built-in breakers and AC side wiring.
TAbLe 5.2: AC InPUT & oUTPUT WIRe SIZInG
Size of built-in breaker
Model no. Marked "Charger"
G4-2012A 40A
G4-2524A 40A
G4-3524A 60A
Making The AC Connections
• Connect the black wire from the Hot side of the utility / generator
AC power to the terminal labeled HOT IN (9).
• Connect the white wire from the Neutral side of the utility AC power
source to the terminal labeled NEU IN (10)
• Connect the green wire from the ground of the AC power source to
the terminal marked GND IN (11)
• Connect the black wire from the terminal marked HOT OUT (14) to
the Hot bus of your AC Load Center or AC Sub-panel.
• Connect the white wire from the terminal marked NEU OUT (13) to
the Neutral bus of your AC Load Center or AC Sub-panel.
• Connect the GND OUT of the inverter to the Equipment Grounding
Bus of the AC Load Center or AC Sub-panel.
• Tightening torque for the connections - 7 to 12 kgf.cm
(0.5 to 0.9 lbf.ft)
32 | SAMLEX AMERICA INC.
Installation
Size of Wire
AWG #8
AWG #8
AWG #6
over Current Protection on The external
AC Input and output Circuits
Ensure that the circuit feeding the AC input of G4 and the circuit feeding
the AC output from G4 to a Service Panel have the following minimum
over-current protection devices:
• G4-2012A - 40A
• G4-2524A - 40A
• G4-3524A - 60A
Grounding To earth or To other
Designated Ground
For safety against electrical shock, the metal chassis of unit is required
to be grounded to the Earth Ground or to the other designated ground.
For example, in a mobile Rv, the metal frame of the Rv is normally
designated as the Negative DC ground / Rv Ground. Similarly, Boat
Ground is provided in the boats.
An Equipment Grounding Connector (5 in Fig. 5.8) has been provided
on the metal chassis of the G4 for connecting to the appropriate ground
through the Equipment Grounding Conductor (EGC). This Equipment
Grounding Conductor (EGC), when appropriately bonded to Earth
Ground, helps to prevent electric shock and allow over-current devices
to operate properly when ground faults occur. The size of this conductor
should be coordinated with the size of the over-current devices involved.
Marine installations require the size of this conductor to be of the same
size as the Battery Negative wire.
Please read following on-line white Papers for complete
understanding of grounding at www.samlexamerica.com
(Home > support > white Papers):
• "Grounded Electrical AC Power Distribution system"
• "Grounding System and Lightning / Ground Fault Protection"
• "Neutral to Ground Switching in RV and Marine Applications"
Grounding Arrangement In G4 Series
Schematic at Fig. 5.12 (page 33) illustrates the grounding arrangement
of G4 Series.
Internally, G4 consists of a DC Section and an AC Section that are
isolated through a transformer. Both these sections are required to be
grounded appropriately.
DC Side Grounding (See Fig. 5.12)
DC side grounding involves proper grounding of the Negative of the
battery, the DC Panel and the DC side of the G4.
A Grounding Connector 4 (5 in the DC side layout in Fig. 5.8) is provided
for connecting to the Equipment Grounding Conductor (EGC) for the DC
side grounding. The connector can accept wire sizes AWG # 4–14. The
set screw size is 5/16" – 24 UNC.
A DC Panel, as shown in Fig. 5.12, is normally provided to connect the
batteries and distribute DC power to the inverter and the other DC loads.
The Negative of the battery is connected to the Neg (-) Bus, which is
connected to the Bus bar for Equipment Grounding Conductors (2),
which in turn is bonded to the Grounding Electrode (GE). Hence, the