API vs NFPA Hazardous Area Classification

api 500 http 500. API Audio 500 Series Components 15 API Audio 512v Preamp API Audio 512v Preamp 8 In stock In stock This product is in stock and can be shipped immediately.

api33, API RP 500 Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division I.