scope:

This Technical Specification gives the procedure and rules for extended application of results of tests carried out according to the test methods described in EN 50399 and/or EN 60332-1-2. The EXAP rules described apply to EN 50399 test results used for classification in classes B2ca,Cca and Dca, additional smoke production classes s1, s2 and s3 and flaming droplets/particles. Cables of diameter 5,0 mm and less should be tested as bundles according to EN 50399 and are excluded from these rules. Bundled cables are not included in the EXAP rules as the fire performance changes dramatically with the change of mounting. No rules have been developed for non circular cables which are not at present included in EN 50399. A specific EXAP rule has been developed for the most common generic power cable families. A general EXAP rule has been developed for any power cable families. The general EXAP rule is not applicable to communication or optical fibre cables. NOTE 1 The general EXAP rule may be applied in the case of hybrid cables provided that the conditions of 6.1 are fulfilled. No EXAP rules have been developed for communication or optical fibre cables due to the limited number of different designs of such cables used in construction works, the limited ability to define families for such cable types and a significant proportion of cables with diameter of 5,0 mm or less for which EXAP rules have not been developed. The use of the specific EXAP rule gives benefit in the lower number of cables to be tested for a range of cable constructions (product family). An EXAP is only possible when cables belong to a defined family as defined in this Technical Specification.