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BSI 21/30435685 DC:2021 Edition

BSI 21/30435685 DC:2021 Edition

$13.70

BS IEC 61156-1. Multicore and symmetrical pair/quad cables for digital communications – Part 1. Generic specification

Published By Publication Date Number of Pages
BSI 2021 52
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PDF Catalog

PDF Pages PDF Title
7 FOREWORD
10 1 Scope
2 Normative references
12 3 Terms and definitions
16 4 Installation considerations
5 Materials and cable construction
5.1 General remarks
5.2 Cable constructions
5.2.1 General
5.2.2 Conductor
17 5.2.3 Insulation
5.2.3.1 General requirements
5.2.3.2 Colour code
5.2.4 Cable element
5.2.4.1 General
5.2.4.2 Screening of the cable element
18 5.2.5 Cable make-up
5.2.6 Screening of the cable core
5.2.7 Sheath
5.2.8 Identification
5.2.8.1 Cable marking
5.2.8.2 Labelling
19 5.2.9 Finished cable
6 Characteristics and requirements
6.1 General remarks – Test configurations
20 6.2 Electrical characteristics and tests
6.2.1 Conductor resistance
6.2.2 Resistance unbalance
6.2.2.1 General requirement
6.2.2.2 Resistance unbalance within a pair
6.2.2.3 Resistance unbalance between pairs
21 6.2.3 Dielectric strength
6.2.4 Insulation resistance
6.2.5 Mutual capacitance
6.2.6 Capacitance unbalance
22 6.2.7 Transfer impedance
6.2.8 Coupling attenuation
6.2.9 Current-carrying capacity
6.3 Transmission characteristics
6.3.1 General requirements
6.3.2 Velocity of propagation (phase velocity)
23 6.3.3 Phase delay and differential delay (delay skew)
6.3.4 Attenuation
6.3.4.1 Attenuation at 20 C operating temperature
25 6.3.4.2 Attenuation at elevated ambient temperatures
6.3.4.2.1 Test chamber
6.3.4.2.2 Sample preparation and test configuration
6.3.4.2.3 Test procedure
6.3.4.3 Attenuation temperature coefficient
26 6.3.5 Unbalance attenuation
6.3.5.1 Equipment
27 6.3.5.2 Balun calibration
28 6.3.5.3 Measurements
6.3.5.3.1 Sample preparation
6.3.5.3.2 Test set-up for unbalance measurements
29 6.3.5.3.3 Expression of test result
30 6.3.6 Near-end crosstalk
32 6.3.7 Far-end crosstalk
35 6.3.8 Alien (exogenous) near-end crosstalk
6.3.8.1 General
37 6.3.8.2 Six cables around one cable
38 6.3.9 Alien (exogenous) far-end crosstalk
6.3.10 Alien (exogenous) crosstalk of bundled cables
39 6.3.11 Impedance
6.3.11.1 Preparation of cable under test
6.3.11.2 Measurement
40 6.3.11.3 Charcteristic impedance
6.3.11.4 Terminated input impedance
6.3.11.5 Fitted characteristic impedance
41 6.3.11.6 Mean characteristic impedance
6.3.12 Return loss
6.3.12.1 Preparation of cable under test
6.3.12.2 Measurement
6.3.12.3 Procedure
42 6.4 Mechanical and dimensional characteristics and requirements
6.4.1 Measurement of dimensions
6.4.2 Elongation at break of the conductor
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 Cold Impact test of the cable
6.4.10 Bending under tension
6.4.10.1 Equipment
6.4.10.2 Test sample
43 6.4.10.3 Procedure
6.4.10.3.1 U-bend test
6.4.10.3.2 S-bend test
44 6.4.10.3.3 Dielectric strength and insulation resistance
6.4.10.4 Test report
6.4.11 Repeated bending of the cable
6.4.11.1 Equipment
45 6.4.11.2 Test sample length
6.4.11.3 Procedure
6.4.11.4 Requirements
6.4.11.5 Test report
46 6.4.12 Tensile performance of the cable
6.4.13 Shock test of the cable
6.4.14 Bump test of the cable
6.4.15 Vibration test of the cable
6.5 Environmental characteristics
6.5.1 Shrinkage of the insulation
6.5.2 Wrapping test of the insulation after thermal ageing
6.5.3 Bending test of the 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 test at high temperature
6.5.7 Cold bend test of the cable
6.5.7.1 Equipment
6.5.7.2 Test sample
47 6.5.7.3 Procedure
6.5.7.4 Test report
6.5.8 Heat shock test
6.5.9 Damp heat steady state
6.5.10 Solar radiation
6.5.11 Solvents and contaminating fluids
6.5.12 Salt mist and sulphur dioxide
6.5.13 Water immersion
48 6.5.14 Hygroscopicity
6.5.15 Wicking
6.5.15.1 Equipment
6.5.15.2 Procedure
49 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 test method
6.5.19 Halogen gas evolution
6.5.20 Smoke generation
6.5.21 Toxic gas emission
6.5.22 Integrated fire test method for cables in environmental air handling spaces
50 Annex A (informative) Acronyms for common cable constructions

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