Electrical110V:

Electrical outlets should be properly covered from both sides. Of equal importance is that electric panels are usually joined 110V and 12V display. When viewed from the backside, most people cannot identify which part is 110V and which part is 12V. 12V is harmless but 110V is not. It's always recommended to cover the 110V portion of all electric panels and provide a visible warning sign, which says, "Disconnect shore/generator power inverter, etc., before opening this electric panel."

Electrical 12V:

All unused electric wires/cables should be removed and open ends properly covered. An active 12V accidentally touching the wrong metal part can cause an explosion or if it comes in contact with fuel, propane or battery fumes, and also cause electrolysis.

Electric wiring should be installed high enough in the bilge, so that if a float switch fails, rising water will not short out the connections and drain and/or damage batteries. Recommendation: Before electric wiring has been joined together with a butt connector, I would insert a proper-sized shrink tubing, surround the connected area with oil & saltwater-proof silicone type application, slide the shrink tubing over it,and shrink the tubing with heat application.  Tubing will shrink and press excess silicone to the sides. For longer lasting connections, you could solder the ends and clean the cables chemically before applying silicone for better bonding and/or connection.

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