Cal Boats CAL 27 Mk III, Owner'S Manual

Page: 20 / 38

20 ELECTRICAL
ELECTRICAL
Master AC and DC Control Panels
The master electrical control panels are located on the aft bulkhead, behind the compan-
ionway stairs . The AC master panel includes circuits for a battery charger, the water heater,
and the port and starboard electrical outlets . The DC master and accessory panels handle all
other electrical systems .
Circuit Breakers
Accessory loads may be selected as desired by turning on the master-control panel circuit
breakers . The circuit breakers will automatically open the circuit by switching themselves to
“OFF” in the event of an overload on a particular circuit .
ALWAYS INVESTIGATE THE CAUSE OF THE OVERLOAD AND CORRECT ANY DEFICIENCIES
BEFORE RE-POSITIONING THE CIRCUIT BREAKER TO “ON” .
ALL WIRES, CONNECTIONS, AND TERMINALS SHOULD BE INSPECTED REGULARLY FOR
LOOSE CONNECTIONS, WHICH MAY CAUSE ELECTRICAL SPARKS, HIGH RESISTANCE OR
FIRES . THIS IS ESPECIALLY IMPORTANT FOR ENGINE ACCESSORY WIRING .
Battery Selector Switch
Before leaving your boat, always turn the master-battery switch to the “OFF” position to
prevent power drainage . DO THIS ONLY AFTER YOU HAVE SHUT DOWN THE ENGINE, for you
may burn out the alternator diodes .
CAUTION!
You may switch from one battery to another for charging, but DO NOT pass through the
“OFF” position while the engine is running . This may burn out the alternator diodes . Keep the
engine RPM as low as possible, when switching batteries .