1.1 This European Standard specifies the requirements for the design, construction, testing and marking of ignition protected equipment using liquid immersion ‘k’ as a means of preventing potential ignition sources from becoming effective according to the category, or categories, of the equipment to which it is constructed. 1.2 It may be used to provide ignition protection, either as an independent means, in addition to, or in combination with, other types of ignition protection listed in EN 13463-1 for Group I, categories M1 and M2 and Group II, categories 1G, 1D, 2G, 2D, 3G and 3D equipment, according to the ignition hazard assessment. 1.3 This European Standard supplements the requirements of EN 13463-1 insofar as it applies to the protection of non-electrical equipment by liquid immersion ‘k’. 1.4 This European Standard does not apply to the ignition protection of electrical equipment. For these requirements reference should be made to EN 50014 and EN 50015, which inter-alia, requires electrically non-conducting protective liquids to be used.