EN 50290-2-1:2005

Introduction
1 Scope
2 Normative references
3 Definitions
4 Common design rules
   4.1 Materials
       4.1.1 Conductor materials
       4.1.2 Optical fibres
       4.1.3 Taping/filler
       4.1.4 Insulating and sheathing materials
       4.1.5 Messenger wires
       4.1.6 Armour
   4.2 Cable make-up
       4.2.1 General design
       4.2.2 Sheathing
       4.2.3 Marking
5 Register of symbols used
6 Material constants
   6.1 Table of material constants relating to dielectric and
       sheath and their values for different materials
   6.2 Tables of material constants relating to conductors
   6.3 Construction constants
       6.3.1 Table of construction constants relating to inner
             conductor
       6.3.2 Table of construction constants relating to braided
             outer conductors and screens
   6.4 Braid wire dimensions
   6.5 Attenuation factors
   6.6 Maximum permissible input power/current carrying capacity
       6.6.1 Coaxial Cables
       6.6.2 Balanced
7 Standard values of characteristic impedance and outer diameter
   of dielectric for coaxial cables
   7.1 Impedance of coaxial cables
   7.2 Nominal diameters over dielectric of coaxial cables
8 Coaxial cable construction details
   8.1 General
   8.2 Inner conductor
   8.3 Stranded inner conductor
   8.4 Braided outer conductor
   8.5 Medium between outer conductor and screen
   8.6 Braided screen
   8.7 Sheath
   8.8 Attenuation
   8.9 Nominal characteristic impedance z[o] and
       capacitance c[2] per unit length
9 Standard values of characteristic impedance and outer diameter
   of dielectric for symmetrical cables
   9.1 Impedance of symmetrical cables
10 Symmetrical cable construction details
   10.1 Attenuation
11 Common characteristics
   11.1 Weight calculation
12 Calculation of electrical properties
   12.1 DC resistance of conductors and screen, per unit length
   12.2 Permissible voltages
        12.2.1 Test voltage, dielectric, u[t]
        12.2.2 Discharge test voltage, dielectric, u[d]
        12.2.3 Test voltage, sheath

This European Standard harmonises the standardisation of symmetrical, coaxial and optical cables used for the infrastructure of communication, multimedia and control networks. Most of the cables covered by this European Standard are primarily intended to be used in IT networks. However, they can also be used for other applications with the exception of those which presume a direct connection to the mains electricity supply. EN 50290-2-1 gives the common rules for the design and construction of symmetrical, coaxial and optical cables used for the infrastructure of communication and control networks. It is to be used in conjunction with EN 50290-1-1 and is completed by generic, sectional, family and detail specifications, as appropriate, to describe in a detailed manner each type of cable with its specific characteristics.