API vs NFPA Hazardous Area Classification

api 500 API RP 500 Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division I. API RP 500 VS NFPA 497. The common purpose of these two Recognized And Generally Accepted Good Engineering Practices (RAGAGEP) for determining hazardous area

api777 login, API RP 500 defines two types of divisions: Division 1: An area in which nitable concentrations of flammable gases, vapors, or liquids.