光纤电缆第2-21部分:室内电缆房屋布线用多光纤分配电缆详细规范

[中文适用范围]： 本部分 IEC 60794 提出了针对此类电缆的详细要求，以确保与国际标准系列 ISO/IEC 11801（信息技术 - 客户场所通用布线（第 1 至 6 部分））的兼容性。家族规范 IEC 60794-2-20 的要求适用于本文档涵盖的电缆。第 4 条中详述的特殊要求定义了与 IEC 60794-2-20 要求相关的特定选项或附加要求。 [外文原描述]： IEC 60794-2-21:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60794-2-21:2019 presents the detailed requirements specific to this type of cable to ensure compatibility with the series of International Standards ISO/IEC 11801, Information technology – Generic cabling for customer premises (Parts 1 to 6). The requirements of family specification IEC 60794-2-20 are applicable to cables covered by this document. Particular requirements detailed in Clause 4 define either a specific option in relation to the requirements of IEC 60794-2-20 or additional requirements. This third edition cancels and replaces the second edition published in 2012. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) incorporation of the OM5 cabled fibre performance category; b) incorporation of the OS1a cabled fibre performance category; c) cabled fibre performance categories OM1, OM2 and OS1 are no longer normative, and are retained for information. Keywords: multi-fibre distribution cables