What is the potential consequence of a shock above 4A?

A shock above 4A can lead to severe and life-threatening consequences, such as cardiac arrest, which can result in heart stopping and death. When a current of this magnitude flows through the body, it significantly disrupts the normal electrical signals that control heart rhythm. The human heart relies on electrical impulses to maintain a consistent beat and function effectively. A substantial current can trigger ventricular fibrillation, an erratic heartbeat that prevents the heart from effectively pumping blood, leading to loss of consciousness and, if not promptly treated, death.

This understanding underlines the critical nature of electrical safety, particularly in environments where high currents may be present, emphasizing the importance of protective measures to reduce the risk of such harmful electrical shocks.