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Northstar 2 kW Radar Installation Manual 35
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Fuse/Circuit breaker
rating
Maximum length of
power cable
Power cable size
2 kW 5 A 33 ft (10 m) 14 AWG
4 kW 10 A 26 ft (8 m) 14 AWG
6 kW 10 A 26 ft (8 m) 14 AWG
10 kW 15 A 26 ft (8 m) 12 AWG
25 kW 15 A 26 ft (8 m) 12 AWG
Typically the fuse /breaker would be located in a fuse/breaker box with the fuses/breakers for other
devices.
The radar processor must have it's own exclusive fuse/circuit breaker. The fuse/circuit breaker should
be labeled appropriately.
To connect the power cable to the radar processor, you must:
1. Strip away approximately 0.4" (10 mm) of the shielding at the end of the power cable, and
then identify the positive wire and the negative wire.
2. Unscrew the small holding screw from the positive power cable input connector (identified
by the + sign) on the radar processor.
3. Insert the bare ends of the positive wire into the positive power cable input connector to
make a connection.
4. Tighten the small holding screw to hold the positive wire in place. Gently pull on the
positive wire to ensure that it is secured.
5. Repeat this process to connect the negative wire to the negative power cable input
connector (identified by the – sign).
4.8 Connect the ground wire
The radar processor has a Chassis Earth connection stud located on the far right hand side of the unit.
The Chassis Earth is DC isolated from power (–ve) to eliminate the risk of galvanic corrosion.
If you are installing the radar processor on a vessel with a metal hull, connect the radar processor
Chassis Earth to the hull at the closest possible location, using 12 AWG wire (or thicker):
The eyelets must be crimped or soldered at both locations (A) and the method of connection to the
vessel's hull is shown at (B).
If you are installing the radar processor on a vessel with a non-metallic hull, connect the radar
processor Chassis Earth to the vessel's ground network. If a vessel's ground network is not available,
leave the radar processor Chassis Earth unconnected.