规定了在火灾条件下测试单个小型垂直电气绝缘导线或电缆或光缆的垂直火焰传播阻力的程序。IEC 60332-2-1中给出了该装置。 当IEC 60332-1-2中规定的方法不适用时，本标准给出了测试小型光纤电缆或小型绝缘导体或电缆的程序，因为一些小型光纤电缆可能会断裂，或小型导体可能会在火焰应用期间熔化。 建议的应用范围适用于截面小于0.5 mm2的小型单绝缘导线或电缆的测试。 注:由于使用能够阻止火焰传播并符合本标准建议要求的绝缘导线或电缆本身不足以在所有安装条件下防止火焰传播，因此建议在传播风险较高的地方，例如，在长串垂直敷设的电缆中，还应采取特殊的安装预防措施。 由于电缆样品符合本标准中建议的性能要求，不能假设一束电缆将以类似的方式工作。（参见IEC 60332-3系列。） 建议的性能要求见附录A。 具有符合IEC指南104的集团安全出版物状态。

Specifies the procedure for testing the resistance to vertical flame propagation for a single small vertical electrical insulated conductor or cable, or optical cable, under fire conditions. The apparatus is given in IEC 60332-2-1. This standard gives the procedure for testing small optical fibre cables or a small insulated conductor or cable when the method specified in IEC 60332-1-2 is not suitable because some small optical fibre cables may break or small conductors may melt during the application of the flame. The recommended range of application is for the testing of small single insulated conductors or cables of less than 0,5 mm2 cross-section. NOTE Since the use of insulated conductor or cable which retards flame propagation and complies with the recommended requirements of this standard is not sufficient by itself to prevent propagation of fire under all conditions of installation, it is recommended that wherever the risk of propagation is high, for example, in long vertical runs of bunches of cables, special installation precautions should also be taken. It cannot be assumed that because the sample of cable complies with the performance requirements recommended in this standard, that a bunch of cables will behave in a similar manner. (See IEC 60332-3 series.) Recommended requirements for performance are given in Annex A. Has the status of a group safety publication in accordance with IEC Guide 104.