Fibre management systems and protective housings to be used in optical fibre communication systems - Product specifications - Part 3-4: Wall box for splice to patchcord connections, for category C and A
1.1 Product definition This European Standard contains the dimensional, optical, mechanical and environmental performance requirements of a fully installed optical fibre wall box, in order for it to be categorized as an EN standard product. The typical configuration is splicing of incoming fibres to optional splitters and/or to pigtails, connecting pigtails plugs on one side to patchcord plugs on the other side, using adapters. A wall box is a protective housing containing a fibre management system with splice trays of various fibre separation levels and connector mounting plates. The wall box may contain one or more of the following: storage and routing of fibre and cable; - uncut fibre cable storage; - splice trays; - adaptors and connectors; - passive optical devices (optical splitters or WDM). A wall box can be installed on a vertical indoor or outdoor surface above ground level. If the wall box is required to be relocatable with cables attached, the following additional tests shall be performed: - cable bending; - cable torsion. This document specifies the number of splice trays and splice/connector capacity for each fibre separation level. The maximum capacity is 144 connectors and splice. For housings with a higher number of splices and connectors the document prEN 50411 4 1 (Cabinets) should be used. Wall boxes for fibre splices only are covered in EN 50411 3 1:2012. 1.2 Operating environment The tests selected, combined with the severity and duration, and are representative of indoor and outside plant for above ground environments defined by: EN 61753 1 Ed2 (20xx): - category C: Controlled (indoor) environment; - category A: Aerial (above ground) environment. 1.3 Reliability Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this European Standard does not guarantee the reliability of the product. This should be predicted using a recognized reliability assessment programme. 1.4 Quality assurance Compliance with this European Standard does not guarantee the manufacturing consistency of the product. This should be maintained using a recognized quality assurance programme. 1.5 Allowed fibre and cable types This wall box standard accommodates EN 60793 2 50 single-mode fibres and EN 60793 2 10 A1a and A1b multimode fibres and all EN 60794 series optical fibre cables with various fibre capacities, types and designs as long as fitting in the cabinet does not contravene the fibre or cable minimum bend radius.