What does the term 'let-go threshold' refer to in electrical safety?

The term 'let-go threshold' refers to the minimum current that causes involuntary muscle contraction. This is a critical concept in electrical safety because it highlights the point at which a person may no longer be able to release or let go of an object that is causing electric shock. When current exceeds this threshold, it can lead to muscle contraction that prevents voluntary movement, which could result in the person being unable to escape from a dangerous situation involving electrical exposure.

Understanding this concept is essential for safety protocols, as it informs the level of caution required when working with or around electrical systems. Awareness of the let-go threshold can help in planning safety measures such as the use of tools or protective equipment that minimize the risk of electric shock, ensuring that workers have the necessary training to respond appropriately in the event of an electrical incident.