Liberian maritime officials (LMA) have addressed the dangers of electrocution on ships in a new maritime advisory and stressed the importance of following safety protocols, especially when using portable electrical equipment. Electrocution can lead to burns, serious injuries, and even death. The outcomes of these incidents depend on factors such as voltage, current amount, and the duration of current passing through the body.
Electrocution Risk Factors
Research shows that currents above 10 milliamperes can cause involuntary muscle contractions. At higher levels, complications such as severe pain, respiratory arrest, and the possibility of death exist. Cardiac arrest occurs at around 1 ampere. Voltage also plays a crucial role in this matter, and precautions should be taken for voltages above 50 volts. Electrical systems on ships operate at various voltages, ranging from 5 volts for signaling equipment to over 1000 volts for electrical panels. Typically, this voltage is reduced to 440 volts for machinery and 220 volts for lighting and outlets for portable equipment.
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Incidents and Analyses
In one case, the use of a portable light connected to the ship's electrical system resulted in the death of a crew member during loading operations. Investigations revealed that improper wiring of the light had caused its body to become electrified. In another incident, a senior crew member lost their life while repairing fixed lighting in the dormitory section without turning off the power supply. In this case, the Lock Out Tag Out (LOTO) protocol, which is mandatory for completely shutting off power before working on live systems, was not properly implemented.
Additionally, the use of electrical devices such as portable grinders and welding machines also poses serious risks. In one instance, a crew member suffered electrocution and lost their life while using a grinder for routine maintenance. Investigations showed that this incident occurred due to an electrical fault in the device.
Furthermore, in another incident, welding to repair a pipe leak in the engine room led to the death of a team member. This individual suffered burns and lost consciousness while working on a steel platform due to not turning off the welding machine. Investigations related to this incident identified intermittent rain before and during the hot work as a potential cause of electrocution.
Liberian maritime officials also emphasized the importance of safety for first responders in electrocution incidents. In some cases, these individuals have also suffered electrocution. Securing electrical sources must be done before attempting to assist the injured person. For more information on how to respond to electrocution cases, the Mariners Medico guide can be consulted.
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