05/23/2023
This is worth the read …
PREVENTING ELECTRIC SHOCK DROWNING (ESD)
Electric Shock Drowning (ESD) occurs when a person is exposed to a typically low level of alternating current (AC) passing through their body, resulting in muscular paralysis that impairs their ability to swim. The source of the electricity that causes ESD is often the wiring of docks or marinas, as well as boats connected to the marina's power supply. In the presence of a fault current, electricity will seek paths back to its source, including through the water and a swimmer's body. In freshwater, the human body is more conductive than the water itself, resulting in a higher current flow through the body compared to saltwater.
Detecting an electrical fault occurring aboard a boat can be challenging, as it is often intermittent and the current may enter the water without obvious signs. Autopsies of ESD victims often do not reveal electrical injuries, and investigators may remain unaware that electricity was the cause of drowning.
To prevent ESD, follow these simple steps:
• Never swim in or near marinas or dock facilities.
• Have your boat's electrical system inspected by an ABYC Certified Technician. Remember, even if your boat has no AC faults, others might have.
• Ensure your boat is equipped with an equipment leakage circuit interrupter (ELCI) or an isolation transformer in accordance with ABYC E-11 guidelines.
If you witness an ESD incident, take the following actions:
• Do not jump in the water to assist the victim.
• Turn off the power source if possible.
• Throw a life ring or floatation device to the victim and attempt to pull them away from the shore.
• Immediately call 911 for emergency assistance.
By adhering to these precautions and knowing how to respond to an ESD incident, you can help prevent these dangerous situations and potentially save lives.
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