After years of additions, removals, abuse, and misguided McGyverisms, no system on board harbors greater potential for starting a fire than your vessel’s electrical system.  Here’s a good example of what we’re talking about – a splice in the main AC power feed (between deck receptacle and main panel) made by simply twisting the wires together and covering it with electrical tape (more is better, right?).  Splices are not recommended here and if they were, you’d at least want to utilize proper, marine grade connections.  The wiring is also not properly supported and secured, meaning it could easily bounce into, say, the spinning propeller shaft to the left.