On ships, sockets and plugs most commonly burn due to poor electrical contact, rather than excessive load alone. When the contact between the plug pins and the socket contacts is loose, worn, or oxidized, the contact resistance increases. This produces localised heating according to P = I²R. Even a relatively small resistance can generate significant heat at high current. Other common causes include loose terminals inside the socket, worn contact springs, corrosion caused by the marine environment, overloaded #sockets, damaged plugs, and the use of adapters or extension leads. Vibration is also an important factor on ships. Continuous vibration and repeated plugging and unplugging can loosen connections over time. This creates a cycle of poor contact → heating → deformation of the plastic → even poorer contact → further heating. If only one socket is burning, first check the #socket terminals, contact springs, and the plug of the connected equipment. If several sockets on the same #circuit are overheating, check the circuit load, #breaker, junction boxes, and connections throughout the supply line. After serious #overheating, replacing only the socket is not enough. The #plug should also be inspected, because its pins may have been damaged, oxidised, or lost their proper contact pressure.

Types of pliers #pliers

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