In which class do buried raceways and cables in a bulk storage plant fall?

Buried raceways and cables in a bulk storage plant typically fall under Class I, Zone 1. This classification is crucial as it designates areas where flammable gases or vapors may be present under normal operating conditions, thus creating a potential hazard for electrical installations.

Class I, Zone 1 indicates locations where explosive gas mixtures are expected to be present intermittently during operations. In a bulk storage plant, the presence of flammable liquids or gases, especially in storage conditions, necessitates stringent electrical safety measures to prevent ignition sources from causing fires or explosions. Buried raceways and cables provide a level of protection and minimize the risk of accidental sparks coming into contact with flammable materials.

This classification guides the design and installation of electrical systems, ensuring that they comply with safety standards appropriate for the operational risks associated with the location. Understanding these classifications is vital for ensuring compliance with the National Electrical Code (NEC) and other safety regulations in hazardous environments.