What is the minimum distance required from live 138kv electrical components when the angle of a fog stream is less than 30 degrees?

When dealing with live electrical components, especially at high voltages like 138kV, maintaining safe distances is crucial to prevent electrical accidents such as arcing, which can occur if personnel or equipment encroach upon the electrical field surrounding these components.

The correct answer indicates that a minimum of 50 feet is required when using a fog stream at an angle of less than 30 degrees. This distance is established based on safety protocols and industry standards that take into account the risk factors associated with high-voltage electricity.

In this scenario, the specific angle of the fog stream being less than 30 degrees suggests that the water is being projected in a manner that could potentially create electrical connections over a wider area if it were to come into contact with the electrical components. Thus, to ensure an appropriate buffer and to mitigate risks, a distance of 50 feet is mandated. This precaution aims to protect firefighting personnel and avoid any inadvertent interaction with the energized parts.

Understanding the rationale behind these safety distances helps ensure not only compliance with legal requirements but also the health and safety of personnel in high-risk situations.