The area horizontally from aircraft power plants that is classified as a Class I, Division 2 location extends up to what distance?

In areas around aircraft power plants, the classification for hazardous locations is guided by the potential for flammable gases or vapors to be present. Specifically, for Class I, Division 2 locations, the hazardous area is typically limited to a horizontal distance of 5 feet from the source of ignition, such as an aircraft's power plant. This classification takes into consideration the likelihood of hazardous materials being released under normal conditions, which is generally low but still requires precautions up to that specified distance to ensure safety.

The rationale behind this classification is to effectively manage risks associated with potential leaks of flammable substances while balancing operational efficiency. Zones closer to the source are classified as Class I, Division 1, where flammable gases or vapors may be present continuously or for long periods, necessitating more stringent safety measures.

In this scenario, the distance defined as 5 feet is aligned with industry standards, making it clear that only within this short proximity to the aircraft power plant could one expect a potential hazard leading to the classification as Class I, Division 2.