IEC 61753-111-08:20 21包含密封光纤封闭件需要满足的最低测试、测试严重性和测量要求，以便符合IEC 61753-1:20 18表A.14中定义的G类接地标准。本文件不包括自由呼吸关闭。第一版取消并取代了2009年发布的IEC 61753-111-8。本版构成技术修订版。本版本包括以下与IEC 61753-111-8相关的重大技术变更: a)根据IEC 61753-1:20 18和IEC 61756-1:20 19更新的术语和定义； b)根据IEC 61753-1:20 18更新测试严重性； c)在20kPa超压下进行密封试验； d)机械密封试验中增加的试验期间压力损失的通过-失败标准；e）振动密封试验改为10 Hz、3 mm振幅和1 000 000次循环； f)减少小直径电缆和管道的电缆保持试验中增加的载荷； g)减小小直径电缆轴向压缩试验的载荷； h)增加扭转和弯曲试验中的循环持续时间； i)取消自由落体试验（由光学冲击试验覆盖）； j)增加1000N 10min的抗压试验； k)组装和拆卸测试:持续时间减少到5个循环； l)耐溶剂和污染流体:增加在柴油中的浸泡，持续时间为1小时，干燥时间为24小时，并增加在凡士林中的浸泡5天； m)对加入的应力开裂溶剂5天的抗性； n)温度变化的持续时间减少到12个循环； o)加入1m水浸泡试验7天。

IEC 61753-111-08:2021 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.