KeyWest Technology 152CC/1520 Sportsman, Quick Manual

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Electrical System
General Overview
The 1520/152CC is equipped with a 12V DC Electrical system. The 1520/152CC can only be rigged for a single motor. If the boat is rigged
without an optional battery selector switch, the boat will be rigged for x1 Group 24 battery. If the battery selector switch is installed, the
boat will be rigged for x2 Group 24 batteries. The battery(s) will provide power to the engine and house systems.
12V power is distributed to the 12V factory installed systems through ATC fuses (1520) located on a fuse block inside the console or circuit
breakers mounted on the dash panel (152CC). Like the 1520, the 152CC features a fuse/ground block that can be used to connect up to 6
additional accessories. All 12V systems are grounded via a single 10GA black wire attached directly to the negative post on the battery. A
30amp main circuit breaker is installed in the starboard transom locker to protect the house systems from overload and is connected either
directly to the batteries or the optional battery selector switch. Additional circuit breakers for the auto bilge pump and stereo memory are
wired directly to either the battery or battery selector switch.
The system is designed so that turning the battery switch off will still allow the bilge pump to function in an automatic mode. Key West
recommends that boats that are going to be left in the water or in a boat lift, where access to the drain plug is not feasible, be installed with a
battery charger to prevent discharge by the bilge pump. Trim Tabs and optional power steering are connected directly to the battery and
feature overcurrent protection. They do not energize until the engine ignition switch is turned to the “On” position.
Battery Selector Switch (Optional)
As an option, a battery selector switch can be installed. The battery selector switch is installed in the starboard transom locker. The battery
switch provides power to the engine and 12V accessories. The switch is a dual circuit switch and has 4 positions (OFF, 1, 2, Both). This
allows power to be supplied by either battery 1, battery 2, or both simultaneously. The switch also directs the charging current from the
engines alternator.
If position “1”, is selected on the switch, the engine and 12V accessories will receive power from Battery 1 and the engine’s alternator will
charge Battery 1. Battery 2 will be isolated and in reserve. If position “2”, is selected on the switch, the engine and 12V accessories will
receive power from Battery 2 and the engine’s alternator will charge Battery 2. Battery 1 will be isolated and in reserve. If position “Both”
is selected, the switch connects the batteries in parallel and the engine and 12V accessories will receive power from both batteries. The
engine’s alternator will charge both batteries simultaneously as well. When the boat is underway, placing the switch in the “Both” position
is recommended so that both batteries charge. When the boat is moored (Engine Off) and 12V accessories are being used, it is
recommended to select position “1” or “2” so that one battery is isolated and can be used to crank the engine.