Contrary to popular belief, the #1 cause of shore power failure and fires is not electrical shorting, but rather overheating caused by poor electrical conductivity. How does this happen? The problems with many plug designs are that the shape of electrical pins allow for very little contact area, and the pins themselves are also largely responsible for bearing any physical stress placed on the cord (from constant movement of the boat, someone tripping on the cord, etc…)
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This results in the pins working loose, further lessening the precious little contact area they had to begin with. Furthermore, such loose connections allow for moisture intrusion and ultimately corrosion of the pins. Arcing occurs and the connection heats up, scorches, and in some cases, catches fire. Because the current draw is unchanged, all of this happens long before a breaker or a GFCI can cut the power. Additionally, the old design can be very difficult to use in low light or hard-to-reach scenarios since the “L” shaped pin must first be located and then oriented before connection
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Old Technology - what is wrong with the current method?
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Introducing The SmartPlug: a revolutionary shore power system designed to replace the outdated and problematic twist-type design in use today. It’s intuitive to use and provides greater protection against loose connections and corrosion – the leading causes of shore power failure and fires