IEC 61752-111-08:2021包含密封光纤封盖需要满足的最低测试、测试严重性和测量要求，以便归类为符合IEC 61753-1:2018表a.14中定义的G类接地IEC标准。本文件不包括自由呼吸关闭装置。第一版取消并取代2009年发布的IEC 61753-111-8。本版为技术修订版。本版本包括与IEC 61753-111-8相关的以下重大技术变更: a） 根据IEC 61753-1:2018和IEC 61756-1:2019更新的术语和定义； b） 根据IEC 61753-1:2018更新的试验严重性； c） 密封试验在20 kPa超压下进行； d） 机械密封试验中增加了试验过程中压力损失的合格-不合格标准； e） 振动密封试验改为10Hz、3mm振幅和1000000次循环； f） 小直径电缆和管道的电缆保持试验中增加的减少荷载； g） 小直径电缆轴向压缩试验的减少荷载； h） 增加了扭转和弯曲试验循环的持续时间； i） 移除自由落体试验（包括光学冲击试验）； j） 增加了1000 N 10 min的抗压试验； k） 组装和拆卸试验:持续时间减少至5个周期； l） 耐溶剂和污染液体:在柴油中浸泡1小时，干燥24小时，并在凡士林中浸泡5天； m） 耐应力开裂溶剂添加5天； n） 温度变化的持续时间减少到12个周期； o） 在1m处进行7天的浸水试验。

IEC 61752-111-08:2021 contains the minimum tests, test severities and measurement requirements which a sealed fibre optic closure need to meet in order to be categorised as meeting the IEC standard for category G - Ground, as defined in Table A.14 of IEC 61753-1:2018. Free breathing closures are not covered in this document. This first edition cancels and replaces IEC 61753-111-8 published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 61753-111-8: a) terms and definitions updated according to IEC 61753-1:2018 and IEC 61756-1:2019; b) test severities updated according to IEC 61753-1:2018; c) sealing tests are done with 20 kPa overpressure; d) pass-fail criterion of pressure loss during test added to mechanical sealing tests; e) vibration sealing test changed to 10 Hz, 3 mm amplitude and 1 000 000 cycles; f) reduced loads added in cable retention test for small diameter cables and tubes; g) reduced loads for cable axial compression test for small diameter cables; h) the duration of the cycles in torsion and bending test is added; i) free fall test removed (is covered by the optical shock test); j) crush resistance test of 1 000 N for 10 min is added; k) assembly and disassembly test: duration reduced to 5 cycles; l) resistance to solvents and contaminating fluids: added immersion in diesel with duration of 1 h and 24 h drying time and added immersion in petroleum jelly for 5 days; m) resistance to stress cracking solvents added for 5 days; n) duration of the change of temperature reduced to 12 cycles; o) water immersion test at 1 m for 7 days added.