Wiring; Ac Safety Grounding; Ac Wiring; Dc Wiring - Mastervolt PowerCombi 12V/1200W-50A 120V User And Installation Manual

4.4

Wiring

WARNING!
Make sure that all wiring is properly installed, in good condition and correctly sized to
match the current ratings of the PowerCombi Inverter/Charger. The wire sizes stated in
this manual are only guidelines. Always comply with all local rules and regulations.
4.4.1

AC Safety grounding

The ground connection (item C in Figure 3) accepts CU/AL conductors from #14 to #2 AWG (2.5 to
35 mm2).
WARNING!
For safety reasons Ground Fault Circuit Interrupters (GFCIs), also known as Residual
Current Devices (RCDs), must be integrated in the AC input and AC output of the
PowerCombi Inverter/Charger. Always comply with all local rules and regulations.
WARNING!
The ground wire offers protection only if the case of the unit is connected to the safety
ground. Connect the chassis ground terminal to the hull or the chassis of the boat or
vehicle that this PowerCombi Inverter/Charger is equipped on.
In inverter state, the AC OUT neutral (N) is automatically connected to the AC ground. In charger
state, i.e. when external AC power is available, the PowerCombi Inverter/Charger disconnects the
neutral AC from the AC ground. Refer to local regulations on these issues!
4.4.2

AC wiring

WARNING!
On first connecting to power, make sure the PowerCombi Inverter/Charger is in a well-
ventilated area as it might spark.
For a safe installation the correct wire cross section must be applied. Do not use a cross section that
is smaller than indicated. Recommended cross section for the AC wiring:
Model
12V/1200W-50A
12V/2000W-100A
Recommended wire colors (refer to local rules):
Wire color Meaning
Black Hot or Line
White Neutral
Green Earth
4.4.3

DC wiring

Keep in mind that high current will pass through the DC wiring. Keep the cable length as short as
possible, this will keep the system efficiency as high as possible.
AC cable cross section
10AWG [6mm
10AWG [6mm
Must be connected to:
L
N
PE / GND
PowerCombi Inverter/Charger
2
]
2
]
11