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Routine electrical maintenance on a boat requires inspecting AC circuit breakers, DC connections, and shore power cables to prevent failure and fire hazards. Flipping every AC breaker during a haul-out reveals loose or worn components that may fail under load, such as when running air conditioning.1:18 Avoid using circuit breakers as primary on-off switches to prevent internal arcing and premature wear.1:46 For DC systems, replace corroded connections with heat-shrink crimp-on terminals, as saltwater environments accelerate green corrosion compared to freshwater.2:20 Avoid twist-on wire nuts, which loosen over time due to vibration.3:03 When installing new wiring, leave six inches of extra length at each end to allow for future trimming of corroded wire.2:56 Inspect alternator belts for cracks, fraying, and black rubber dust, which indicates belt degradation.4:04 Always thread down the shore power cable’s retaining ring to ensure a secure, low-resistance connection; loose prongs create heat that poses a significant fire risk.4:32

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