This European Standard specifies the basic requirements for the planning, implementation and operation of information technology cabling using balanced copper cabling and optical fibre cabling. This standard is applicable to a) cabling designed to support particular analogue and digital communications services including voice services; b) generic cabling systems designed in accordance with series EN 50173 and intended to support a wide range of communications services. This standard is intended for those involved in the procurement, installation and operation of information technology cabling. Furthermore this standard is addressed to – architects, building designers and builders; – main contractors; – designers, suppliers, installers, maintainers and owners of information technology cabling; – public network providers and local service providers; – end users. This standard is applicable to certain hazardous environments but does not exclude additional requirements which are applicable in particular circumstances, e.g. in the presence of electricity supply and electrified railways. This part of the standard c) sets out requirements for satisfactory installation and operation of information technology cabling outside buildings; it is not restricted to campus areas, d) excludes specific requirements applicable to other cabling systems (e.g. power cabling, coaxial cabling); however, it takes account of the effects other cabling systems may have on the installation of information technology cabling (and vice versa) and gives general advice.