IEC 60079-28:2015

IEC 60079-28:2015 specifies the requirements, testing and marking  of equipment emitting optical radiation intended   for use   in explosive atmospheres. It also covers equipment located outside the explosive    atmosphere or protected by a Type  of Protection listed in IEC 60079-0, but which generates optical radiation that  is intended to enter an explosive atmosphere. It covers Groups I, II and III, and EPLs Ga, Gb, Gc, Da,    Db, Dc, Ma and  Mb. This standard does not cover ignition by ultraviolet radiation and by absorption of the radiation in the explosive mixture itself. Explosive absorbers or absorbers that contain their own oxidizer as well as catalytic absorbers are also outside the scope of this standard. This second edition cancels   and replaces the first edition, published in 2006, and constitutes a technical revision. Refer to the Foreword of the document for a complete listing of the technical  changes between edition 2.0 and previous edition of the document.