IEC 61753-111-9 Ed. 1.0 b:2009

IEC 61753-111-9:2009 contains the minimum test and measurement requirements and severities which a sealed fibre optic closure must satisfy in order to be categorised as meeting the IEC standard for category S - subterranean, as defined in Annex A of IEC 61753-1. Free breathing closures are not covered in this standard.