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gpelectric.com | [page 33]
3.6.10 GROUNDING THE INVERTER - AC GROUNDING
The IC Series Inverter/Charger should always be connected to a permanent, grounded wiring system. An Inverter/Charger
system that is properly grounded will reduce the risk of electric shock, and reduce radio frequency noise. The main aim of any
grounding system is to provide a well defined, very low resistance path from the electrical system to the grounding system. The
low resistance grounding path carries fault currents directly to ground if the electrical system malfunctions.
The neutral and safety ground should be connected at the AC source. The AC source could be shore power (utility power),
generator or the Inverter (battery bank). The AC neutral should be connected to
one safety ground at a time
. This single
connection is required to make the electrical panels neutral line safe by connecting it to ground. If more than one connection
between the neutral and ground is made, currents can circulate between neutral and ground and cause ground loop currents.
Ground loop currents can trip GFCIs and cause an electric shock hazard.
When using the IC Series in inverting mode and when using multiple other AC power sources (shore or generator power), there
is the potential of having multiple connections between neutral and ground. The Inverter/Charger automatically switches the
neutral to ground when switching from Inverting to AC pass-through mode.
In
inverting mode
the relays switch to position 1. This means the AC neutral output is connected to the chassis ground on the
IC Series, which is usually connected to the
earth ground
on the RV, work truck, or boat.
120 VAC
50A
IN 1
AC Hot 1 from main panel
ACN-IN
AC Neutral from main panel
AC Ground
AC Ground from main panel
OUT 1
AC Live to sub panel
ACN-OUT
AC Neutral to sub panel
AC Ground
AC Ground to sub panel
Shore Power
120 VAC
Generator Power
120 VAC
120 VAC
Main Panel
Sub Panel
AC Terminal Block
240 VAC
50A
Shore Power
120/240 VAC
Generator Power
120/240 VAC
120 VAC
Main Panel
Sub Panel
IN 2
AC Hot 2 from main panel
IN 1
AC Hot 1 from main panel
ACN-IN
AC Neutral from main panel
OUT 1
AC Live to sub panel
ACN-OUT
AC Neutral to sub panel
AC Terminal Block
IN 2
AC Hot 2 from main panel
AC Power
Source
Maximum
Input
Breaker
required
Minimum
Wire
Size
Maximum
Inverter
Pass
Through
Capacity
Hot 1 (Leg 1)
50A
(Single Pole Breaker)
Hot 2 (Leg 2)
50A
(Single Pole Breaker)
#6 AWG
(Input & Output)
50A
12000W
50A @ 120VAC (Hot 1)
50A @ 120VAC (Hot 2)
Note:
Loads must be correctly balanced between both
phases (Hot 1 and Hot 2) on the breaker panels in order to
get maximum capacity
AC Power
Source
Maximum
Input
Breaker
required
Minimum
Wire
Size
Maximum
Inverter
Pass
Through
Capacity
#8 AWG
(Input & Output)
6000W
50A @ 120VAC (Hot 1 + Hot 2)
120 VAC
≤
25 Amps a Leg
#6 AWG
#6 AWG
#8 AWG
#8 AWG
GFCI
Outlet
GFCI
Outlet
GFCI
Outlet
GFCI
Outlet
ACN-IN (White)
AC Neutral Input
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
GROUND
AC Power from Utility or
Generator
ACN-IN (White)
AC Neutral Input
AC Power Source
Ground
AC Power Source
Ground
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
Inverter/Charger Chassis Ground
GROUND
Inverter/Charger Chassis Ground
Main Chassis (RV, Boat)
Earth
Ground
Main Chassis
Earth
Ground
ACN-IN (White)
AC Neutral Input
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
GROUND
AC Power from Utility or
Generator
AC Neutral to AC Source Ground
Transfer Relay
Connected
AC Power Source
Ground
Main Chassis
Earth
Ground
2
1
2
1
x
AC Neutral to Chassis
Ground -
Permanently
Disabled
Screw Removed
AC Neutral to Chassis
Ground
Disconnected
AC Neutral to AC Source Ground
Transfer Relay
Connected
AC Neutral to AC Source Ground
Transfer Relay
Disconnected
AC Neutral to Chassis
Ground
Connected
Neutral Bus Bar
Ground Bus Bar
Neutral Bus Bar
Ground Bus Bar
Neutral Bus Bar
Ground Bus Bar
OUT 2
AC Live to sub panel
50A
(Single Pole Breaker)
Maximum 50A Breaker
(single pole)
AC Ground
AC Ground from main panel
AC Ground
AC Ground to sub panel
OUT 2
AC Live to sub panel
Neutral Bus Bar
Ground Bus Bar
Hot 1 (Black)
Hot 2 (Red)
External
Transfer Switch
(only required if using
a hardwired generator
and shore power)
External
Transfer Switch
(only required if using
a hardwired generator
and shore power)
Hot 1 (Black)
120 / 240 VAC
50 Amps per 120 VAC leg.
Hot 1 + Hot 2.
Split Phase -
≤
50 Amp Service
Install Option 1
Single Phase - 30> Amp Service
Inverter/Charger Chassis Ground
Inverter/Charger Chassis Ground
Notes:
* All previous converter/charger wiring must be disconnected from the
breaker panel. The IC Series is now used for battery bank charging.
Notes:
* All previous converter/charger wiring must be disconnected from the
breaker panel. The IC Series is now used for battery bank charging.
Inverter/Charger
Inverter / Charger
Inverter/Charger Chassis Ground
Inverter/Charger Chassis Ground
.
In
AC pass-through mode,
the relays switch to position 2. The chassis ground to neutral output on the Inverter/Charger is
disconnected and the AC power source neutral to ground (usually located at utility panel or generator) is used to provide the
neutral to ground for the AC power being used in the RV, work truck, or boat.
120 VAC
50A
IN 1
AC Hot 1 from main panel
ACN-IN
AC Neutral from main panel
AC Ground
AC Ground from main panel
OUT 1
AC Live to sub panel
ACN-OUT
AC Neutral to sub panel
AC Ground
AC Ground to sub panel
Shore Power
120 VAC
Generator Power
120 VAC
120 VAC
Main Panel
Sub Panel
AC Terminal Block
240 VAC
50A
Shore Power
120/240 VAC
Generator Power
120/240 VAC
120 VAC
Main Panel
Sub Panel
IN 2
AC Hot 2 from main panel
IN 1
AC Hot 1 from main panel
ACN-IN
AC Neutral from main panel
OUT 1
AC Live to sub panel
ACN-OUT
AC Neutral to sub panel
AC Terminal Block
IN 2
AC Hot 2 from main panel
AC Power
Source
Maximum
Input
Breaker
required
Minimum
Wire
Size
Maximum
Inverter
Pass
Through
Capacity
Hot 1 (Leg 1)
50A
(Single Pole Breaker)
Hot 2 (Leg 2)
50A
(Single Pole Breaker)
#6 AWG
(Input & Output)
50A
12000W
50A @ 120VAC (Hot 1)
50A @ 120VAC (Hot 2)
Note:
Loads must be correctly balanced between both
phases (Hot 1 and Hot 2) on the breaker panels in order to
get maximum capacity
AC Power
Source
Maximum
Input
Breaker
required
Minimum
Wire
Size
Maximum
Inverter
Pass
Through
Capacity
#8 AWG
(Input & Output)
6000W
50A @ 120VAC (Hot 1 + Hot 2)
120 VAC
≤
25 Amps a Leg
#6 AWG
#6 AWG
#8 AWG
#8 AWG
GFCI
Outlet
GFCI
Outlet
GFCI
Outlet
GFCI
Outlet
ACN-IN (White)
AC Neutral Input
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
GROUND
AC Power from Utility or
Generator
ACN-IN (White)
AC Neutral Input
AC Power Source
Ground
AC Power Source
Ground
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
Inverter/Charger Chassis Ground
GROUND
Inverter/Charger Chassis Ground
Main Chassis (RV, Boat)
Earth
Ground
Main Chassis
Earth
Ground
ACN-IN (White)
AC Neutral Input
ACN-OUT (Black)
AC Neutral to sub panel
GROUND
GROUND
AC Power from Utility or
Generator
AC Neutral to AC Source Ground
Transfer Relay
Connected
AC Power Source
Ground
Main Chassis
Earth
Ground
2
1
2
1
x
AC Neutral to Chassis
Ground -
Permanently
Disabled
Screw Removed
AC Neutral to Chassis
Ground
Disconnected
AC Neutral to AC Source Ground
Transfer Relay
Connected
AC Neutral to AC Source Ground
Transfer Relay
Disconnected
AC Neutral to Chassis
Ground
Connected
Neutral Bus Bar
Ground Bus Bar
Neutral Bus Bar
Ground Bus Bar
Neutral Bus Bar
Ground Bus Bar
OUT 2
AC Live to sub panel
50A
(Single Pole Breaker)
Maximum 50A Breaker
(single pole)
AC Ground
AC Ground from main panel
AC Ground
AC Ground to sub panel
OUT 2
AC Live to sub panel
Neutral Bus Bar
Ground Bus Bar
Hot 1 (Black)
Hot 2 (Red)
External
Transfer Switch
(only required if using
a hardwired generator
and shore power)
External
Transfer Switch
(only required if using
a hardwired generator
and shore power)
Hot 1 (Black)
120 / 240 VAC
50 Amps per 120 VAC leg.
Hot 1 + Hot 2.
Split Phase -
≤
50 Amp Service
Install Option 1
Single Phase - 30> Amp Service
Inverter/Charger Chassis Ground
Inverter/Charger Chassis Ground
Notes:
* All previous converter/charger wiring must be disconnected from the
breaker panel. The IC Series is now used for battery bank charging.
Notes:
* All previous converter/charger wiring must be disconnected from the
breaker panel. The IC Series is now used for battery bank charging.
Inverter/Charger
Inverter / Charger
Inverter/Charger Chassis Ground
Inverter/Charger Chassis Ground
.
INSTALLATION