【正文】 4 3 Definitions......................................................................................................... 4 4 Cable construction............................................................................................ 4 Conductor .................................................................................................. 4 Insulation ................................................................................................... 5 Cabling elements ........................................................................................ 5 Identification of cabling elements ................................................................ 5 Screening of cabling elements .................................................................... 5 Cable makeup ........................................................................................... 5 Filling pound ........................................................................................ 5 Interstitial fillers .......................................................................................... 5 Screening of the cable core ........................................................................ 5 Moisture barriers ........................................................................................ 5 W rapping layers ......................................................................................... 5 Sheath ....................................................................................................... 5 5 Tests and requirements for pleted cables ................................................. 6 Electrical tests ........................................................................................... . 6 Mechanical tests ........................................................................................ . 8 Environmental tests ................................................................................... . 9 Fire performance tests ............................................................................... . 9 EN 5028 8 6 2 :2 00 3 ? 4 ? 1 Scope This sectional specification covers unscreened cables, characterised up to 250 MHz, to be used as work area cables to connect a telemunications outlet to the terminal equipment and for patch cord cables to establish connections on a patch panel as defined in EN 50173. Work area cables may also be used as patch cord cables in any distributor of a generic building wiring system to interconnect with equipment or to crossconnect between cabling systems. The electrical, mechanical, transmission and environmental performance characteristics of the unscreened cables, related to their reference test methods, are detailed. This sectional specification is to be read in conjunction with EN 502881, which contains the essential provisions for its application. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the cited publications are listed hereafter. For dated references, subsequent amendments to or revisions of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. EN 50173 Information technology Generic cabling systems EN 502881 Generic specification for multielement metallic cables used in analogue and digital munication and control EN 50289 Series Communication cables Specifications for test methods EN 50290 Series Communication cables IEC 601892 Lowfrequency cables and wires with PVC insulation and PVC sheath Part 2: Cables in pairs, triples, quads and quintuples for inside installations 3 Definitions For the purposes of this European Standard the definitions of EN 502881 apply. 4 Cable construction Conductor The conductor shall be solid or stranded copper and meet the requirements of of EN 502881. The stranded conductor shall consist of seven wires each with a nominal diameter of ? 0,12 mm to ? 0,2