BS EN 50411-4-1:2019 pdf free.Fibre management systems and protective housings to be used in optical fibre communication systems – Product specifications.
1.2 Operating environment The tests selected, combined with the severity and duration, are representative of outside plant above ground environments defined by EN 61753-1 Category A: Aerial environment. 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this document does not guarantee the reliability of the product. This should be predicted using a recognised reliability assessment programme. 1.4 Quality assurance Compliance with this document does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. 1.5 Allowed fibre and cable types This street cabinet standard allows EN 60793-2-50 single-mode fibres and EN 60793-2-10 A1-OM1 to A1-OM5 multimode fibres to be used and is suitable for all EN 60794 series optical fibre cables with their various fibre capacities, types and designs as long as ftting in the cabinet does not contravene the minimum bend radius.3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ●IEC Electropedia: available at http://www.electropedia.org/ ●ISO Online browsing platform: available at http://www.iso.org/obp. 3.1.1 active fibre or live fibre fibre in an optical circuit or node that is carrying an optical signal 3.1.2 adapter component in which two or more ferrules are aligned Note 1 to entry: A ferrule is the fibre holding component part of the optical fibre connector plug. 3.1.3 cable element grouping of fibres under the cable sheath 3.1.5 fibre management system FMS system to control, protect and store splices, connectors, passive optical components and fibres from incoming to outgoing cables Note 1 to entry: A fibre management system is intended for installation within a protective housing. Note 2 to entry: A fibre management systems is often called an“organiser”. 3.1.6 free breathing housing protective housing that allows a free exchange of air with the environment Note 1 to entry: Free breathing closures are used in aerial environments for the interconnection of cables. Limited water ingress and/or limited dust ingress is possible. Free breathing housings are not intended for use in areas that are subject to flooding or water immersion. Note 2 to entry: A free breathing closure may look like a sealed closure, but it is not designed to hold a varying overpressure or underpressure caused by temperature changes or atmospheric pressure changes. 3.1.7 microduct small, flexible lightweight tube with an outer diameter between 3 mm and 16 mm.BS EN 50411-4-1 pdf download.