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Electrical systems on boats require two distinct distribution paths: switched and unswitched.0:31 Switched distribution connects loads to the battery through a master battery switch, allowing the operator to cut power to these circuits entirely.0:35 This category includes 95% of DC loads, such as lights, water pumps, macerators, chart plotters, radar, and GPS units.4:00 In contrast, unswitched distribution connects devices directly to the battery, bypassing the master switch to ensure continuous power.0:54 This path requires a fuse for safety but must remain energized even when the main battery switch is off.1:00 Essential equipment requiring unswitched power includes bilge pumps, carbon monoxide detectors, and stereo memory.1:37 Charging and power-generation sources, such as alternators, battery chargers, solar controllers, wind turbines, and fuel cells, also require direct, unswitched connections to the battery to prevent damage or system failure.2:00 Proper separation ensures critical safety devices remain functional while allowing the user to isolate non-essential loads.

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