Final answer:
The subject addresses the effects of electrical shocks from Conducted Electrical Weapons and their safety standards regarding permissible exposure durations. It delves into the human body's reaction to various levels of electric current and the importance of setting a directive for safe exposure time in seconds to prevent injuries. However, without the specific text of the directive, the exact time cannot be determined.
Step-by-step explanation:
The directed question relates to the standards concerning the safe durations of exposure to electrical currents from Conducted Electrical Weapons (CEWs), such as TASERs. Understanding these safety standards requires a knowledge of the effects of electrical shocks on the human body. Very small currents, below the threshold of sensation (1 mA), pass harmlessly through the body. However, currents above 5 mA are considered the maximum safe level according to numerous safety rules. When the current reaches 10 to 20 mA, it can cause sustained muscular contractions similar to nerve impulses, which can lead to involuntary movements or the 'can't let go' phenomenon where stronger muscles, such as those that close the fingers, overpower the muscles that open them. This effect could seriously prolong the duration of an electrical shock and is dangerous both to the victim and potential rescuers. Modern electrical safety devices, such as electric fences, are designed with pulsed currents to prevent prolonged contact and the associated dangers.
In the context of CEW use, the directive mentioned would specify a maximum duration of exposure in seconds to minimize the potential for harm. The Human Body's Conductivity and its interaction with electric currents are integral here; current will preferentially flow along paths with minimum resistance, which is why insulating footwear is required in many professions that involve risk of electrical exposure.
With the provided technical background on electrical safety and its importance in minimizing harm, it is clear that the specific duration set by the directive would be critical to ensure compliance with safety regulations. Unfortunately, without the actual directive text or specific duration mentioned within, it is impossible to fill in the blank. Providing a number here would be purely speculative and, therefore, incorrect.