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The requirements for equipment designed for use in explosive atmospheres are established by the new ATEX Directive 2014/34/EU (transposed into Romanian legislation by GD 245/2016) which entered into force starting from 20th of May 2016. The explosion protection characteristics of equipments have to be assessed. For the assessment, these equipments are also subjected to type tests. In case of Group I electrical equipment (designed for use in underground firedamp mines), in the type tests category are also included the tests to verify the resistance to chemical agents for Group I electrical equipment. The purpose of this paper is to present the importance of providing resistance to chemical agents for Group I electrical equipment, and also, to underline the testing methodology developed based on the requirements imposed by the applicable standards. [ABSTRACT FROM AUTHOR]