SIST EN 50288-7:2006

Multi-element metallic cables used in analogue and digital communication and control -- Part 7: Sectional specification for instrumentation and control cables

This sectional specification covers multi-element cables suitable for connecting instruments and control systems for analogue or digital signal transmission. They may or may not be screened and optionally may incorporate armouring and/or moisture or environmental protection layers. The cables shall have a mechanically robust construction and electrical transmission handling properties. The electrical, mechanical, transmission and environmental performance characteristics of the cables, related to their reference test methods are detailed. This sectional specification is to be read in conjunction with EN 50288-1, which contains the essential provisions for its application. Cables covered by this specification have maximum rated voltages of 90 V, 300 V and 500 V a.c. These cables shall not be connected directly to mains electricity supply or other low impedance sources. Multi-element cables for use in analogue, digital and control circuits are not designed to be used for power supply.  These cables should be installed in accordance with the applicable local and national regulations. Cables intended to have limited circuit integrity in a fire are not covered by this specification, but they are however under consideration for future editions. There may be occasions when cables are required to have higher operating temperature ratings than those provided by using materials specified by the EN 50290 series. Suitable alternative materials are under consideration.

Mehradrige metallische Daten- und Kontrollkabel für analoge und digitale Übertragung -- Teil 7: Rahmenspezifikation für Instrumenten- und Kontrollkabel

Diese Rahmenspezifikation gilt für hochpaarige Kabel zum Anschluss von Instrumenten sowie von Steuerungs- und Überwachungssystemen für analoge und digitale Signalübertragung. Die Kabel können geschirmt oder ungeschirmt sein und können optional eine Armierung und/oder eine Feuchtigkeitssperre oder Schutzfolien gegen Einflüsse der Umgebung enthalten. Die Kabel müssen aus einer mechanisch robusten Konstruktion und bestehen und robuste elektrische Übertragungseigenschaften aufweisen. Die elektrischen und die mechanischen Eigenschaften sowie die Übertragungseigenschaften und das Verhalten der Kabel gegenüber Umgebungseinflüssen, bezogen auf ihre Referenz-Prüfverfahren, ist ausführlich beschrieben. Diese Rahmenspezifikation ist in Verbindung mit EN 50288-1 zu lesen, in der die Grundlagen für die Anwendung der Kabel beschrieben sind. Für die Kabel dieser Spezifikation gilt eine maximal zulässige Wechselspannung von 90 V, 300 V and 500 V  Diese Kabel dürfen nicht direkt an die Netzspannung oder an andere Quellen mit niedriger Impedanz angeschlossen werden. Kabel mit mehreren Elementen für analoge und digitale Signalübertragung sind nicht für die Stromversorgung geeignet. Diese Kabel müssen in Übereinstimmung mit den lokalen und nationalen Regulierungen installiert werden. Kabel mit Funktionserhalt im Brandfall werden in dieser Norm nicht beschrieben, sind jedoch in Beratung für spätere Ausgaben. Es kann Anwendungen geben, bei denen Kabel mit höheren Betriebstemperaturen gefordert werden als die Temperaturen, die in der Reihe EN 50290 beschrieben sind. Geeignete alternative Werkstoffe sind in Beratung.

Câbles métalliques à éléments multiples utilisés pour les transmissions et les commandes analogiques et numériques -- Partie 7: Spécification intermédiaire pour les câbles d'instrumentation et de contrôle

La présente spécification intermédiaire couvre les câbles à éléments multiples pour le raccordement des instruments et des systèmes de commande pour la transmission de signaux analogiques et numériques. Ils peuvent être blindés ou non et peuvent éventuellement incorporer une armure et/ou des couches de protection contre l’humidité ou l’environnement. Les câbles doivent posséder une construction mécaniquement robuste et des propriétés de transmission électrique. Les caractéristiques de performance électrique, mécanique, de transmission et d’environne-ment pour les câbles, relatives à leurs méthodes d’essai référencées, ont été détaillé. La présente spécification intermédiaire doit être lue conjointement avec l’EN 50288-1, qui contient les dispositions essentielles pour son application. Les câbles couverts par la présente spécification possèdent des tensions assignées maximales de 90 V, 300 V et 500 V en courant alternatif. Ces câbles ne doivent pas être connectés directement aux réseaux d'alimentation électrique ou à d'autre source à faible impédance. Les câbles à éléments multiples utilisés dans les circuits analogiques, numériques et de commande ne sont pas conçus pour être utilisés dans l’alimentation électrique.  Il convient d’installer ces câbles conformément aux réglementations locales et nationales applicables. Les câbles prévus pour posséder une intégrité électrique limitée dans un incendie ne sont pas couverts par cette spécification, mais ils sont cependant à l’étude pour des éditions futures. Il peut exister des cas dans lesquels les câbles ont nécessairement des caractéristiques de température de fonctionnement supérieures à celles fournies en utilisant des matériaux spécifiés par la série EN 50290. D’autres matériaux adaptés sont à l’étude.

Večelementni kovinski kabli za analogne in digitalne komunikacije in krmiljenje – 7. del: Področna specifikacija za instrumentne in krmilne kable

General Information

• Status: Published
• Publication Date: 28-Feb-2006
• ICS: 33.120.20 - Wires and symmetrical cables
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2006
• Due Date: 01-Mar-2006
• Completion Date: 01-Mar-2006
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/212 - ICT - metallic and optical cables and cabling systems
• Ref Project: EN 50288-7:2005 - Multi-element metallic cables used in analogue and digital communication and control - Part 7: Sectional specification for instrumentation and control cables

Relations

• Revised: oSIST prEN 50288-7:2021 - Multi-element metallic cables used in analogue and digital communication and control - Part 7: Sectional specification for instrumentation and control cables
• Effective Date: 24-Jul-2018

Overview

EN 50288-7:2005 (CLC) is the European sectional specification for multi-element metallic instrumentation and control cables used for analogue and digital signal transmission. It defines construction, electrical, mechanical, transmission and environmental performance requirements for cables intended to connect instruments and control systems. This part is to be read together with EN 50288-1, which contains the essential application provisions.

Key points:

• Applies to multi-core/multi-pair cables (screened or unscreened), optionally armoured and with moisture/environmental protection.
• Maximum rated voltages: 90 V, 300 V and 500 V a.c.
• Cables are for instrumentation, digital/analogue signals and control circuits - not for direct connection to mains or other low-impedance power sources.
• Cables with limited circuit integrity in fire are currently excluded (under future consideration).

Key topics and technical requirements

• Conductor specification
  • Solid, stranded or flexible copper (plain or coated) per HD 383 (Class 1, 2 or 5).
  • Typical conductor sizes covered: 0.5 mm² to 2.5 mm² (special rules for thermocouple extension in Annex D).
• Insulation
  • Permitted materials: PVC, polyethylene, polypropylene, halogen-free flame retardant compounds, cross-linked polyethylene (refer EN 50290 series).
  • Minimum insulation thicknesses are specified per conductor size and rated voltage (table provided in the standard).
  • Concentricity requirement: minimum 75% (measured per Annex A).
• Cable element construction
  • Lay length limits for pairs/triples/quads (≤100 mm for ≤1.5 mm²; ≤150 mm for 2.5 mm²).
  • Identification per IEC 60189-2 / EN 60708; non-hygroscopic binders allowed.
• Screening and shielding
  • Options: metal braid (minimum filling factor 0.6), foil + braid (min. 0.3), or foil with drain wire (foil overlap ≥20%).
  • Screening applies to individual elements and/or whole cable core.
• Moisture, bedding, sheaths and armour
  • Moisture barriers: water-swellable tapes/powders, filling compounds, laminated metal foil sheaths (metallic foil ≥0.15 mm), or combinations.
  • Inner/outer sheaths and bedding materials referenced to EN 50290 series; metallic protection and armouring options included.
• Tests and annexes
  • Contains electrical, mechanical and environmental test requirements and references to EN 50289 test methods. Annexes cover insulation thickness checks, braid calculations, dimensions and thermocouple extension conductors.

Practical applications and users

Who uses EN 50288-7:2005:

• Cable manufacturers (product design, specification and testing)
• Instrumentation and control engineers (specifying cabling for process plants, automation, control panels)
• System integrators, OEMs and procurement teams (product compliance & selection)
• Test laboratories and certification bodies (conformance testing)

Typical applications:

• Instrumentation and control wiring in process plants, factory automation, building-control systems and industrial communication links where signal integrity, mechanical robustness and environmental protection are required.

Related standards

• EN 50288-1 (essential provisions for application)
• EN 50290 series (insulation/sheath materials)
• EN 50289 (test methods)
• HD 383 (conductors)
• IEC 60189-2 / EN 60708 (identification, thermocouple extension)

Keywords: EN 50288-7:2005, instrumentation and control cables, multi-element metallic cables, cable screening, armouring, insulation requirements, cable construction, EN 50288-1, CLC.

Standards Content (Sample)

SLOVENSKI SIST EN 50288-7:2006

STANDARD
marec 2006
Večelementni kovinski kabli za analogne in digitalne komunikacije in
krmiljenje – 7. del: Področna specifikacija za instrumentne in krmilne kable
Multi-element metallic cables used in analogue and digital communication and
control - Part 7: Sectional specification for instrumentation and control cables
ICS 33.120.20 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 50288-7
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2005

ICS 33.120.10
English version
Multi-element metallic cables used
in analogue and digital communication and control
Part 7: Sectional specification
for instrumentation and control cables

Câbles métalliques à éléments multiples Mehradrige metallische Daten-
utilisés pour les transmissions et les und Kontrollkabel für analoge
commandes analogiques et numériques und digitale Übertragung
Partie 7: Spécification intermédiaire Teil 7: Rahmenspezifikation
pour les câbles d'instrumentation für Instrumenten- und Kontrollkabel
et de contrôle
This European Standard was approved by CENELEC on 2005-04-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

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

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50288-7:2005 E
Foreword
This European Standard was prepared by SC 46XC, Multicore, Multipair and Quad Data
communication cables, of Technical Committee CENELEC TC 46X, Communication cables.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50288-7 on 2005-04-01.
This Part 7 is to be used in conjunction with EN 50288-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-04-01
__________
- 3 - EN 50288-7:2005
Contents
1 Scope.5
2 Normative references.5
3 Definitions, symbols and abbreviations .6
4 Cable construction.6
4.1 Conductor .6
4.2 Insulation.7
4.3 Cable elements.7
4.4 Identification of cabling elements.8
4.5 Screening of cabling elements.8
4.6 Cable make-up.8
4.7 Filling compound.8
4.8 Interstitial fillers.8
4.9 Screening of the cable core .8
4.10 Moisture barriers.9
4.11 Protective wrappings.9
4.12 Inner sheath.10
4.13 Bedding layers.10
4.14 Metallic protection.10
4.15 Integral suspension strand.11
4.16 Outer sheathing .11
4.17 Fauna protection.11
4.18 Chemical and/or environmental protection.11
4.18.1 Lead sheath .12
4.18.2 Multi-layer sheath.12
5 Test methods and requirements for completed cables.12
5.1 Electrical tests.13
5.1.1 Low frequency and d.c. electrical measurements.13
5.2 Mechanical tests .13
5.3 Environmental tests.14
5.4 Fire performance test methods .14

Annex A (normative) Insulation thickness and concentricity - Selection of samples
and evaluation of results.15
Annex B (normative) Copper braid screening .16
Annex C (normative) Determination of cable dimensions .17
Annex D (informative) Thermocouple extension and compensating conductors.22

Table 1 – Minimum insulation thickness .7
Table B.1 – Braid wire diameter.16
Table C.1 – Steps to determine fictitious cable diameter .17
Table C.2 – Conductor diameters.18
Table C.3 – Lay up factors .19
Table C.4 – Crush factors.19
Table C.5 – Bedding radial thickness .20
Table C.6 – Round armour wire.20
Table C.7 – Tape armour .20
Table C.8 – Braid armour wire size.21
Table D.1 – Extension cables .22
Table D.2 – Compensating cables.22

- 5 - EN 50288-7:2005
1 Scope
This sectional specification covers multi-element cables suitable for connecting instruments and
control systems for analogue or digital signal transmission. They may or may not be screened
and optionally may incorporate armouring and/or moisture or environmental protection layers.
The cables shall have a mechanically robust construction and electrical transmission handling
properties. The electrical, mechanical, transmission and environmental performance
characteristics of the cables, related to their reference test methods are detailed.
This sectional specification is to be read in conjunction with EN 50288-1, which contains the
essential provisions for its application.
Cables covered by this specification have maximum rated voltages of 90 V, 300 V and
500 V a.c.
These cables shall not be connected directly to mains electricity supply or other low impedance
sources. Multi-element cables for use in analogue, digital and control circuits are not designed
to be used for power supply.
These cables should be installed in accordance with the applicable local and national
regulations.
Cables intended to have limited circuit integrity in a fire are not covered by this specification, but
they are however under consideration for future editions.
There may be occasions when cables are required to have higher operating temperature
ratings than those provided by using materials specified by the EN 50290 series. Suitable
alternative materials are under consideration.
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.
Publication Year Title
EN 10218-1 - Steel wire and wire products – General – Part 1: Test methods
EN 10244-2 - Steel wire and wire products – Non-ferrous metallic coatings on
steel wire – Part 2: Zinc or zinc alloy coatings
EN 10257-1 - Zinc or zinc alloy coated non-alloy steel wire for armouring either
power cables or telecommunications cables – Part 1: Land cables
EN 50289 Series Communication cables - Specifications for test methods
EN 50290 Series Communication cables
EN 50307 - Lead and lead alloy sheath and sleeves of electric cables

EN 60708 - Low-frequency cables with polyolefin insulation and moisture barrier
polyolefin sheath (IEC 60708)
EN 60811-1-1 - Insulating and sheathing materials of electric and optical cables –
Common test methods – Part 1-1: General application –
Measurement of thickness and overall dimensions – Tests for
determining the mechanical properties (IEC 60811-1-1)
HD 383 S2 - Conductors of insulated cables First supplement: Guide to the
dimensional limits of circular conductors
(IEC 60228 + IEC 60228A, mod.)
HD 446.3 S1 - Thermocouples - Part 3: Extension and compensating cables –
tolerances and identification system (IEC 60584-3, mod.)
IEC 60189-2 - Low-frequency cables and wires with PVC insulation and PVC
sheath - Part 2: Cables in pairs, triples, quads and quintuples for
inside installations
3 Definitions, symbols and abbreviations
For the purposes of this European Standard the definitions of EN 50288-1 apply in addition to
the following:
3.1
foil
a metal tape laminated to a plastic tape
4 Cable construction
4.1 Conductor
Except for thermocouple extension and compensating cables, with conductors as described in
Annex D, conductors shall be solid, stranded or flexible plain or metal coated copper in
accordance with Class 1, 2 or 5 of HD 383 in the range of 0,5 mm² to 2,5 mm². For multi-core
cables the maximum conductor resistance shall be as HD 383, and for finished multi-pair, multi-
triple and multi-quad cables the maximum resistance of HD 383 shall be increased by 2 %.
Conductor joints shall be as EN 50288-1.
Stranded and flexible conductors shall consist of wires circular in cross section assembled,
without insulation between them, by concentric stranding or by bunching.
When the installed length of cable results in a high conductor resistance, larger conductor sizes
can be used.
- 7 - EN 50288-7:2005
4.2 Insulation
The insulating material shall be selected from those listed below. It shall be applied to comply
with the requirements of EN 50288-1.
a) PVC EN 50290-2-21
b) Polyethylene EN 50290-2-23
c) Polypropylene EN 50290-2-25
d) Halogen free flame retardant compound EN 50290-2-26
e) Cross-linked polyethylen EN 50290-2-29
The minimum thickness at any point of the insulation shall not be less than the value given in
Table 1, for the specified voltage rating, and the concentricity shall not fall below 75 % when
measured using the procedure in Annex A.
There may be occasions when cables are required to have higher operating temperature
ratings than those provided by using materials specified by the EN 50290 series. Suitable
alternative materials are under consideration.
Table 1 – Minimum insulation thickness
Conductor size Minimum thickness
mm mm
Voltage rating
90 V 300 V 500 V
0,5 0,20 0,26 0,44
0,75 0,20 0,26 0,44
1,0 0,26 0,26 0,44
1,5 0,30 0,35 0,44
2,5 - - 0,53
4.3 Cable elements
Cable elements shall be in accordance with 4.3 of EN 50288-1.
The lay length of a pair, triple or quad shall not exceed 100 mm for cables with conductor cross-
section ≤ 1,5 mm², nor 150 mm for cables with conductor cross-section 2,5 mm².

4.4 Identification of cabling elements
Unless otherwise specified e.g. by means of numbered cores or tapes, the coding for
identification shall be as given in IEC 60189-2 or EN 60708, as appropriate. The colours shall
meet the requirements of 4.4 of EN 50288-1.
Coloured or numbered non-hygroscopic binder tapes may be applied over screened cabling
elements as identification.
4.5 Screening of cabling elements
When screening of individual cable elements is specified, it shall be selected from those listed
below and applied in accordance with 4.5 of EN 50288-1:
a) a plain or coated metal braid with a minimum filling factor of 0,6 when calculated in
accordance with Annex B;
b) a combination of a foil, and a plain or coated metal braid with a minimum filling factor of 0,3
when calculated in accordance with Annex B. The use of a drain wire is optional when this
type of screen is applied;
c) a foil applied with a minimum overlap of 20 % and with a drain wire in direct contact with
the metallic side of the foil.
Metal braid wire diameters are given in Table B.1.
4.6 Cable make-up
The cable elements shall be assembled together in concentric layers or in unit construction to
form the cable core.
The cable core assembly shall be protected by wrappings of non-hygroscopic tape.
Successive layers may be separated from each other by interlayer binders of non-hygroscopic
tape.
4.7 Filling compound
When a filling compound is specified, it shall be selected from the compounds given in
EN 50290-2-28 and shall meet the requirements of 4.7 of EN 50288-1.
4.8 Interstitial fillers
When fillers are used they shall meet the requirements of 4.8 of EN 50288-1.
4.9 Screening of the cable core
The cable core shall be protected with a protective layer as described in 4.11 or 4.13 when it is
covered with a screen.
- 9 - EN 50288-7:2005
When screening of the cable core is specified, it shall be selected from those listed below, and
applied in accordance with 4.9 of EN 50288-1:
a) a plain or coated metal braid with a minimum filling factor of 0,6 when calculated in
accordance with Annex B;
b) a combination of a foil, and a plain or coated metal braid with a minimum filling factor of 0,3
when calculated in accordance with Annex B. The use of a drain wire is optional when this
type of screen is applied;
c) a foil applied with a minimum overlap of 20 % and with a drain wire in direct contact with
the metallic side of the foil.
Metal braid wire diameters
...