What is the focus of Article 515?

Article 515 of the National Electrical Code (NEC) is primarily concerned with the electrical requirements and safety measures for bulk storage plants that handle flammable and combustible liquids. This article lays out specific guidelines to ensure that electrical installations in these potentially hazardous environments minimize risks such as electrical sparks that could ignite vapors. It defines the necessary safety protocols, equipment specifications, and installation practices to protect both workers and the facility.

The focus on bulk storage plants reflects the importance of addressing the unique challenges that come with storing and managing large quantities of flammable materials, which can pose significant safety threats if proper precautions aren't taken. Therefore, the correct identification of Article 515 aligns with the intention of promoting safety in environments where electrical installations interact with flammable substances.