BS EN 50117-10-2 pdf free download

BS EN 50117-10-2 pdf free download.Coaxial cables.
3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50290-1-2:2004, EN 50117-1:2019 and the following apply. 3.1 drop cable coaxial cable which is used to connect from subscriber tap or a directional coupler to a system outlet, b) subscriber tap to a subscriber splitter, c) subscriber splitter to a system outlet 3.2 outdoor drop cable drop cable for outdoor application 4 Requirements for cable construction and design 4.1 General Cables according to this standard are designed for an operating temperature range from -40。C to +70 °C1) and at frequencies between 5 MHz and 3 000 MHz. When designing the cable, consideration should be given to the maximum admissible current stated in the detail specification. It is assumed that the raise of temperature of the inner conductor when submitted to the maximum current under nominal ambient conditions does not affect the mechanical and electrical properties of the cable. Cables according to this standard may be operated at voltages> 50 V AC or> 75 V DC according to the detail specification of the manufacturer. However, these cables are not intended for direct connection to the mains electricity supply or other low impedance sources.Cables according to this standard shall be designed according to EN 50290-2-1, Communication cables Part 2-1: Common design rules and construction. They shall be used according to EN 50290-4-1, Communication cables – Part 4-1: General considerations for the use of cables – Environmental conditions and safety aspects. The use of cables according to this standard including delivery, storage and installation shall be in accordance with EN 50290-4 2, Communication cables – Part 4-2: General considerations for the use of cables – Guide to use, unless otherwise specified. Cables according to this standard shall be tested for voltage withstanding. The test is performed between conductors and between the conductors or screen and the outer surface of the sheath. When constructed in accordance with EN 50290-2-1 and EN 50117-1 and submitted to spark testing, CATV cables according to this standard may be installed together with Low Voltage cables. AII cables covered by this standard do not fall under the scope of the RED or the EMC Directive. Nevertheless, transfer impedance and screening attenuation according to 5.1.3.6 and 5.1.3.7 shall be specified in the relevant detail specification, if the intended application of the cable is the use in combination with equipment under the RED or the EMC Directive. 4.2 Inner conductor The conductor shall meet the requirements of 4.2 of EN 50117-1:2019, and shall be solid and may be plain or metal coated. Dimensions shall be in accordance with the detailed specification. There shall be no joint made subsequent to the last drawing operation. In case of metal coated conductor, consideration shall be taken for the compatibility of the connector 4.3 Dielectric The dielectric material(s) shall be in accordance with 4.3 of EN 50117-1:2019 and shall consist of polyolefin materials， with EN 50290-2-37 (polyethylene)， EN 50290-2-38 (polypropylene). Dimensions shall be in accordance with the detail specification. Unless otherwise specified, the nominal diameter over the dielectric should be one of the preferred values, namely 3,7 mm, 4,8 mm and 7,2 mm. 4.4 Outer conductor or screen The construction and material of the outer conductor (or screen) shall meet the requirements of 4.4 items b), f) or g) of EN 50117-1:2019. Where option b) is used, a double braid layer is required. For braid constructions or helically wound wires, the braid angle shall be between 15° and 45°. The coverage factor shall be greater than or equal to 65 %, or, when the cable is provided with a metal foil, greater than or equal to 25 %. These values are also valid for cables with two bi-directional layers of helically wound wires.BS EN 50117-10-2 pdf download.