EN 50290-4-2:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Komunikacijski kabli - 4-2. del: Splošno o uporabi kablov - Vodilo za uporaboKommunikationskabel - Teil 4-2: Allgemeine Betrachtungen für die Anwendung der Kabel - Leitfaden für die VerwendungCâbles de communication - Partie 4-2: Considérations générales pour l'utilisation des câbles - Guide d'utilisationCommunication cables - Part 4-2: General considerations for the use of cables - Guide to use33.120.10Koaksialni kabli. ValovodiCoaxial cables. WaveguidesICS:Ta slovenski standard je istoveten z:EN 50290-4-2:2008SIST EN 50290-4-2:2008en,fr,de01-november-2008SIST EN 50290-4-2:2008SLOVENSKI
STANDARD
EUROPEAN STANDARD EN 50290-4-2 NORME EUROPÉENNE
EUROPÄISCHE NORM July 2008
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50290-4-2:2008 E
English version
Communication cables -
Part 4-2: General considerations for the use of cables -
Guide to use
Câbles de communication -
Partie 4-2: Considérations générales
pour l'utilisation des câbles -
Guide d'utilisation
Kommunikationskabel -
Teil 4-2: Allgemeine Betrachtungen
für die Anwendung der Kabel -
Leitfaden für die Verwendung
This European Standard was approved by CENELEC on 2008-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
ICS 33.120.10 SIST EN 50290-4-2:2008

at national level by publication of an identical
national standard or by endorsement
(dop)
2009-02-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2011-02-01 __________ SIST EN 50290-4-2:2008

- 3 - EN 50290-4-2:2008 Contents 1 Scope . 5 2 Normative references . 5 3 Communication cable basics . 6 4 Types of cables . 6 4.1 Twisted pairs cables . 7 4.2 Coaxial cable (unbalanced) . 8 4.3 Flexible cables versus rigid cables . 9 5 Cables and regulations . 9 5.1 Low voltage. 10 5.2 Fire reactions and Euroclasses . 11 5.3 Electromagnetic behaviour . 10 6 Criteria for the choice of the cables . 14 6.1 Cable construction . 14 6.2 Cabling . 16 6.3 Transmission performance . 16 7 Installation practices . 18 7.1 Delivery . 18 7.2 Storage . 18 7.3 Pre-installation procedure . 19 7.4 Pulling of the cable. 20 7.5 Installation . 20 7.6 Mechanical considerations . 20 8 Cabling installation versus location . 25 8.1 Outside plant . 25 8.2 Intrabuilding . 28
Figure 1 – Balanced cabling . 6 Figure 2 – Unbalanced cabling . 6 Figure 3 – Starquads . 7 Figure 4 – Pairs . 7 Figure 5 – Example of pair arrangement in a telecommunication cable . 8 Figure 6 – Coaxial cable illustration . 8 Figure 7 – Twisted pairs cables – Screen description . 13 Figure 8 – Reel of cables . 18 Figure 9 – Reel storage . 19 Figure 10 – Advised way for pulling a cable . 20 Figure 11 – Tensile strength . 21 Figure 12 – Shrinkage and elongation of Internal and external element . 21 Figure 13 – Common handling mistakes when bending cables . 22 Figure 14 – Crush and impact testing . 23 Figure 15 – Cable stapling . 24 Figure 16 – Cable buried in a trench. 25 Figure 17 – Cable buried in a trench with a warning tape . 26 SIST EN 50290-4-2:2008

Table 1 – Types of cabling according to applications . 16 Table 2 – Cables for CATV / MATV / TV and Video distribution . 17 Table 3 – Cables for access network . 17 Table 4 – Cables that might be used for some given applications . 18
- 5 - EN 50290-4-2:2008
1 Scope The scope of this European Standard is to help installers and cabling designers to understand the range of communication metallic cables available. To help this choice the fundamental and practical rules on how to use these cables are established. The related cables are specified in the documents issued by CLC/TC 46X and its sub-committees. These cables are: - telecom cables used in access network, - data communication twisted pairs cables, - coaxial cables used in CATV.
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50083 series Cable networks for television signals, sound signals and interactive services EN 50117 series Coaxial cables used in cabled distribution networks EN 50173 series Information technology - Generic cabling systems EN 50174 series Information technology - Cabling installation EN 50200 Method of test for resistance to fire of unprotected small cables for use in emergency circuits EN 50288 series Multi-element metallic cables used in analogue and digital communication and control EN 50289-3-9 Communication cables - Specifications for test methods -
Part 3-9: Mechanical test methods - Bending tests EN 50289-4-16 1) Communication cables - Specifications for test methods -
Part 4-16: Environmental test methods - Circuit integrity under fire conditions EN 50290 series Communication cables EN 50406 series End user multi-pair cables used in high bit rate telecommunication networks EN 50407-1 Multi-pair cables used in high bit rate digital access telecommunication networks - Part 1: Outdoor cables EN 50441 series Cables for indoor residential telecommunication installations
1) At draft stage. SIST EN 50290-4-2:2008

Balanced cabling involve twisted-pair and/or twinaxial twisted cables that are composed of one or more pairs of copper wires (see Figure 1). Unbalanced cabling involves coaxial cable, that has only one centre conductor of either solid or stranded inner conductor and an outer concentric conductor. Most data and voice networks use twisted-pair cabling. Coaxial cable is now used primarily for CATV, satellite and video connections (see Figure 2).
Outer conductor Inner conductor
Figure 1 – Balanced cabling Figure 2 – Unbalanced cabling
- 7 - EN 50290-4-2:2008
4.1 Twisted pairs cables 4.1.1 Pair construction There are two different pairing constructions: - a pair made of two insulated wires twisted together (wire A and B in Figure 4); - a quad made of four insulated wires twisted together, providing two pairs from a star formation (first pair wire A and B and second pair wire D and C in Figure 3); - a pair made of two insulated wires twisted together; - a quad made of four insulated wires twisted together, providing two pairs. ADBC AB Figure 3 – Starquads Figure 4 – Pairs 4.1.2 Pair counts Telecommunications cable comes in many sizes, starting with a single pair of wires, up to and perhaps more than 4 200 pairs of wires. These pairs may be arranged in concentric layers or in bundles. A data communication terminal is fed normally with a maximum of 4 pairs, so the last part of the network is built with cables having 1 to 4 pairs. As the other parts of the network aggregate several terminal cables, they have a larger number of pairs. The highest number of pairs is encountered at the main communication switch. The main communication switch is then connected to global systems by satellite, fibre, radio, waveguide and coaxial (CATV). The identification of each pair in the cable is made through an appropriate colour code that is given in the relevant standard or may be agreed between customer and manufacturer (see example in Figure 5). SIST EN 50290-4-2:2008

Figure 5 – Example of pair arrangement in a telecommunication cable 4.2 Coaxial cable (unbalanced) Coaxial cable is called ‘coaxial’ because it includes one conductor surrounded by a layer of insulation, itself
...