Wiring; Dc Wiring; Ac Wiring - Mastervolt CombiMaster 12V/2000W 100A User And Installation Manual

12
CombiMaster 120V Series – User and Installation Manual
4.5

Wiring

WARNING!
The wire and fuse sizes stated in this manual are only guidelines. Always comply with all
local rules and regulations.
WARNING!
On first connecting to power, make sure the CombiMaster Inverter/Charger is in a well-
ventilated area as it might spark.

4.5.1 DC wiring

Always keep your wire runs as short as practical to prevent low voltage shutdowns and to keep the DC
breaker from nuisance tripping (or open fuses) because of increased current draw.
Model
12V/2000W-100A
12V/3000W-160A
24V/2000W-60A
24V/3000W-70A
Use 5/16" [M8] cable lugs on the ends of the wires. These lugs should be crimped with a proper
crimping tool. Recommended wire colors (refer to local rules):
Wire color Meaning
Red Positive
Black or yellow Negative
Do not put anything between the battery cable ring lug and the battery post or the inverter's DC
terminal. When connecting the battery cable to the battery post or inverter DC terminal, the cable
should be placed directly against the inverter terminal or battery post. Incorrectly installed hardware
causes a high resistance connection which could lead to poor inverter/charger performance and may
affect the cable and terminal connections.
Run the cables next to each other to limit the electromagnetic field around the cables. The negative
cable should be connected directly to the negative post of the battery bank or the ground side of a
current shunt. Do not use the chassis frame as the negative conductor. Tighten securely. The positive
cable must be fused and connected to the positive post of the battery bank. Use a fuse that matches
the applied wire size. The fuse with fuse-holder is available from your local Mastervolt distributor.

4.5.2 AC wiring

WARNING!
The ground wire offers protection only if the case of the CombiMaster Inverter/Charger is
connected to the safety ground. Connect the ground terminal (PE / GND) to the hull or the
chassis the boat or vehicle that this CombiMaster Inverter/Charger is equipped on.
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
CombiMaster Inverter/Charger. Always comply with all local rules and regulations.
For a safe installation the correct wire cross section must be applied. Don't use a cross section that is
smaller than indicated. Recommended cross section for the AC wiring:
DC cable cross section
<10ft [3m]
2
AWG 2/0 [70 mm ]
2
AWG 3/0 [95 mm ]
2
AWG 2 [35 mm ]
2
AWG 1/0 [50 mm ]
Connect to:
+ (POS)
– (NEG)
10-16ft [3-5m]
2
AWG 3/0 [95 mm ]
2
AWG 4/0 [120mm ]
2
AWG 1/0 [50 mm ]
2
AWG 2/0 [70 mm ]