Product definition This specification contains the initial, start of life dimensional, mechanical and environmental performance requirements which an unprotected microduct must meet. It does not address the installation capability of these products which must be agreed between the user and supplier. Operating environment The tests selected combined with the severities and duration are representative of an outside plant for subterranean and/or aerial environment defined by: — ETS 300 019 : class 8.1: underground locations (without earthquake requirement) — EN 61753-1 : category S: subterranean environment, category A: aerial environment Quality assurance Compliance with this specification does not guarantee the manufacturing consistency of the product. This should be maintained using a recognised quality assurance programme. Allowed product types This standard covers all European Standard on optical fibre unprotected microducts. This includes, but is not limited to, EN 60794-5, Optical fibre cables - Part 5: Sectional specification - Microduct cabling for installation by blowing. Allowed microduct connector types This microduct standard allows the use of all European Standard on microduct connectors, including: straight, reducer/enlarger stem, reducer/enlarger, close down, liquid block, liquid block with barb end, and end stop connectors. This includes EN 50411-2-8, Fibre organisers and closures to be used in optical fibre communication systems - Product specifications - Part 2-8: Microduct connectors, for air blown optical fibres, Type 1.