API RP 500: Electrical Installations Classification for Petroleum Facilities

API RP 500 refers to the Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2. This document is published by the American Petroleum Institute (API) and provides guidance on the classification of electrical installations in petroleum facilities based on the presence of flammable gases or vapors.

The API RP 500 outlines the criteria for determining the hazardous locations and the appropriate electrical equipment and wiring methods to be used in these areas. It also provides information on the design, installation, and maintenance of electrical systems in hazardous locations to ensure safety and prevent potential ignition sources.

The classification of locations in petroleum facilities is important for the proper selection and installation of electrical equipment to minimize the risk of explosions or fires. The API RP 500 helps facility owners, engineers, and operators to comply with safety regulations and industry standards in hazardous environments.