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BS IEC 61156-7:2023

BS IEC 61156-7:2023

$142.49

Multicore and symmetrical pair/quad cables for digital communications – Symmetrical pair cables with transmission characteristics up to 1 200 MHz. Sectional specification for digital and analogue communication cables

Published By Publication Date Number of Pages
BSI 2023 30
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Installation consideration
4.1 General remarks
4.2 Bending radius of installed cable
4.3 Climatic conditions
5 Material and cable construction
5.1 General remarks
5.2 Cable construction
5.2.1 General
5.2.2 Conductor
11 5.2.3 Insulation
5.2.4 Cable element
5.2.5 Cable make-up
5.2.6 Screening of the cable core
5.2.7 Sheath
12 5.2.8 Identification
5.2.9 Finished cable
6 Characteristics and requirements
6.1 General remarks
6.2 Electrical characteristics and tests
6.2.1 Conductor resistance
6.2.2 Resistance unbalance within a pair
6.2.3 Dielectric strength
13 6.2.4 Insulation resistance
6.2.5 Mutual capacitance
6.2.6 Capacitance unbalance pair to ground
6.2.7 Transfer impedance
6.2.8 Coupling attenuation
Table 1 – Transfer impedance
Table 2 – Coupling attenuation
14 6.2.9 Current-carrying capacity
6.2.10 Resistance of the screen
6.3 Transmission characteristics
6.3.1 General remark
6.3.2 Velocity of propagation (phase velocity)
6.3.3 Phase delay and differential phase delay (delay skew)
15 6.3.4 Attenuation (α)
6.3.5 Unbalance attenuation near-end (TCL, EL TCTL)
Table 3 – Attenuation, constant values
Table 4 – Attenuation values
16 6.3.6 Near-end crosstalk (PS NEXT, NEXT)
17 6.3.7 Far-end crosstalk (PS ACR-F, ACR-F)
Table 5 – Near-end crosstalk, power-sum (PS NEXT)
18 6.3.8 Alien (exogenous) near-end crosstalk
6.3.9 Alien (exogenous) far-end crosstalk
6.3.10 Alien (exogenous) crosstalk of bundled cables
6.3.11 Impedance
6.3.12 Return loss (RL)
Table 6 – Far-end crosstalk (PS ACR-F)
19 6.4 Mechanical and dimensional characteristics and requirements
6.4.1 Dimensional requirements
6.4.2 Elongation at break of the conductors
6.4.3 Tensile strength of the insulation
6.4.4 Elongation at break of the insulation
6.4.5 Adhesion of the insulation to the conductor
6.4.6 Elongation at break of the sheath
6.4.7 Tensile strength of the sheath
6.4.8 Crush test of the cable
6.4.9 Impact test of the cable
Table 7 – Return loss
20 6.4.10 Bending under tension
6.4.11 Repeated bending of the cable
6.4.12 Tensile performance of the cable
6.4.13 Shock-test requirements of the cable
6.4.14 Bump-test requirements of the cable
6.4.15 Vibration-test requirements of the cable
6.5 Environmental characteristics
6.5.1 Shrinkage of insulation
6.5.2 Wrapping test of insulation after thermal ageing
6.5.3 Bending test of insulation at low temperature
6.5.4 Elongation at break of the sheath after ageing
6.5.5 Tensile strength of the sheath after ageing
6.5.6 Sheath pressure at high temperature
21 6.5.7 Cold bend test of the cable
6.5.8 Hot shock test
6.5.9 Damp heat steady state
6.5.10 Solar radiation (UV)
6.5.11 Solvents and contaminating fluids
6.5.12 Salt mist and sulphur dioxide
6.5.13 Water immersion
6.5.14 Hygroscopicity
6.5.15 Wicking
6.5.16 Flame propagation characteristics of a single cable
6.5.17 Flame propagation characteristics of bunched cables
6.5.18 Resistance to fire
6.5.19 Halogen gas evolution
22 6.5.20 Smoke generation
6.5.21 Toxic gas emission
6.5.22 Integrated fire test
7 Introduction to the blank detail specification
28 Bibliography

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BS IEC 61156-7:2023
$142.49