1、BRITISH STANDARD Mineral insulated cables with a rated voltage not exceeding 750 V- Part 3: Guide to use (Implementation of HD 586.3:2001) ICs 29.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS 6207-3: 2001 BS 6207-3:2001 Amd. No. National foreword Date Comments This
2、 British Standard implements Harmonization Document HD 586.3:2001, which was published by the European Committee for Electrotechnical Standardization (CENELEC). The UK participation in its preparation was entrusted by Technical Committee GELDO, Electric cables, to Subcommittee GEL2OI1, Wiring cables
3、, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in
4、the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section ent
5、itled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compli
6、ance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Electrotechnica Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 4 O
7、ctober 2001 8 BSI 4 October 2001 The following BSI references relate to the work on this standard: Committee reference GELJ20/1 Draft for comment 981263045 DC Summary of pages This document comprises a front cover, an inside front cover, the HD title page, pages 2 to 10, an inside back cover and a b
8、ack cover. The BSI copyright date displayed in this document indicates when the document was last issued. ISBN O 580 37077 1 HD 586.3 SI HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT July 2001 ICs 29.060.20 English version Mineral insulated cables with a rated voltage not ex
9、ceeding 750 V Part 3: Guide to use Cbles isolant minral de tension assigne ne dpassant pas 750 V Partie 3: Guide demploi Mineralisolierte Leitungen mit einer Nennspannung bis 750 V Teil 3: Anwendungsrichtlinien This Harmonization Document was approved by CENELEC on 2000-12-01. CENELEC members are bo
10、und to comply with the CENKENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning such national implementation may be obtained on application to the Central Secretari
11、at or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Neth
12、erlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 0 2001
13、 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. HD 586.3 S1:2001 E BS 6207-3:2001 Foreword This Harmonization Document was prepared by the Technical Committee CENELEC TC 20, Electric cables. It was submitted to the Unique Acceptance
14、 Procedure and was approved by CENELEC as HD 586.3 SI on 2000-12-01. The following dates were fixed: - latest date by which the existence of the HD has to be announced at national level - latest date by which the HD has to be implemented at national level by publication of a harmonized national stan
15、dard or by endorsement (doa) 2001-07-0 (dop) 2002-01-0 - latest date by which the national standards conflicting with the HD have to be withdrawn (daw) 2003-01-01 Annexes designated “informative“ are given for information only. In this standard, annex A is informative. 2 BS 6207-3:2001 Contents Page
16、 Introduction . 4 1 Scope . 4 2 References . 4 3 Definitions 4 4 Safety . 4 4.1 Fundamental considerations 4 4.2 General . 4 4.3 Support and fixing . 5 5 Limiting conditions . 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 General . 5 Voltage 5 Current carrying capacity 5 Thermal effects . 6 Mechanical stres
17、s . 7 Compatibility . 7 Dynamic stresses . 7 Flexing 7 Corrosion protection and direct burial 7 6 Installation 8 7 8 Initial and periodic verification 8 Packaging, storage and handling I transportation . 8 8.1 Packaging . 8 8.2 Storage . 8 8.3 Handling I transportation 9 Annex A (informative) Biblio
18、graphy 10 3 BS 6207-312001 Introduction The aim in publishing this standard is to inform users of the properties and limiting conditions for mineral insulated electric cables and therefore to avoid misuse of the cables. 1 Scope This standard provides a guide to the proposed safe use of electric cabl
19、es and their terminations as presently covered in the following standards. HD 586 Mineral insulated cables with a rated voltage not exceeding 750 V Part 1: Cables Part 2: Terminations 2 References This standard refers to other publications that provide information or guidance. Editions of these publ
20、ications current at the time of issue of this standard are listed in annex A but reference should be made to the latest editions. 3 Definitions The meaning and sense of the terms used in this standard are as defined in the current edition of HD 384.2 unless otherwise stated. 4 Safety 4.1 Fundamental
21、 considerations 4.1.1 property whilst being used in its intended manner. Safety of a cable means that the product does not present an unacceptable risk of danger to life or 4.1.2 distribution of electricity. 4.1.3 The test methods, test parameters and requirements described in the standards referred
22、 to in clause 1 are only for the purpose of checking design with respect to safety and quality assurance. They should not be regarded as providing guidance that the cables are suitable for service under conditions equivalent to the test conditions. Unless otherwise stated, cables should not be used
23、for any other purpose than the transmission and 4.2 General 4.2.1 All conductors and cables should be selected so as to be suitable for the voltages and currents likely to occur under all conditions which are or should have been anticipated in the equipment or installation in which they are used. 4.
24、2.2 far as it is reasonably practical. 4.2.3 reasonably be expected to operate safely under normal circumstances are given in Table 1. Cables should be so constructed, installed, protected, used and maintained as to prevent danger so The limiting temperature conditions under which mineral insulated
25、cables and terminations can These conditions are those considered capable of ensuring a length of life in service which has been accepted as reasonable by experience of the cable and terminations and in particular conditions of use. 4 BS 6207-3:2001 4.2.4 classification. Cables should be selected so
26、 that they are suitable for the operating conditions and equipment Examples of operating conditions are: a) voltage; b) overcurrent; c) protective measures; d) grouping of cables; e) method of installation; f) accessibility. 4.2.5 Cables should be selected so that they are suitable for any external
27、influences that may exist. Examples of external influences are: a) ambient temperature; b) presence of rain, steam or accumulation of water; c) presence of corrosive, flammable, chemical or polluting substances; d) mechanical stresses (such as through holes or sharp edges in metal work); e) fauna (s
28、uch as rodents); f) flora (such as mould); g) radiation (such as sunlight). NOTE In respect of item g) it should be noted that coiour is important, a black covering giving a higher degree of protection. 4.3 Support and fixing Cables should be supported adequately. Recommended maximum spacings for su
29、rface installations are given in Table 2. For inaccessible positions the weight of the cable between supports should be taken into account and the advice of the cable manufacturer obtained. 5 Limiting conditions 5.1 General The influences of all factors as outlined in 5.2 to 5.9 should be considered
30、 in combination not separately. 5.2 Voltage The rated voltage of a cable is the reference voltage for which the cable is designed and which serves to define the electrical tests. 5.3 Current carrying capacity 5.3.1 The cross-sectional area of every conductor size should be such that its current carr
31、ying capacity is not less than the maximum sustained current which will normally flow through it. For the purposes of this standard, the limiting temperature to which the current carrying capacity is related should not exceed that appropriate to the maximum cable termination operating temperature, t
32、he cable covering material, if any, or any material in contact with the cable. 5.3.2 are given in CENELEC Report ROW-001. The values given have been determined such that the limiting temperatures given in Table 1 of this standard are not exceeded under particular defined conditions where the cables
33、are continuously loaded. For current ratings for other installed conditions the cable manufacturer should be consulted. The current carrying capacities of cables for fixed wiring, to meet the requirements of HD 384.5.523, 5 BS 6207-3:2001 5.3.3 In the case of soft soldered conductor joints or connec
34、tions the limiting temperature for the conductor under short circuit conditions is 160 OC. Account of this limitation should be taken in selecting and operating cables. 5.3.4 these conditions in determining the current carrying capacity of a cable. Defined conditions include the method of installati
35、on of the cables used. Account should be taken of Correction factors for quoted current carrying capacities are available for particular conditions such as: a) ambient temperature; b) cable grouping; c) type of overcurrent protection; d) presence of thermal insulation. 5.3.5 cable terminations, cove
36、ring or surrounding material may be damaged. 5.3.6 capacity alone; account should be taken of the influence of the requirements for protection against: a) electric shock; b) thermal effects; c) overload and short circuit currents; d) voltage drop; e) mechanical strength. If cables are operated for p
37、rolonged periods at temperatures above those given in Table 1 then the The selection of the cross-sectional area of any conductor should not be based on current carrying 5.4 Thermal effects 5.4.1 The limiting temperatures of cables are given in Table 1. The values given should not be exceeded by any
38、 combination of the heating effect of the current in the conductors and the ambient conditions. Particular account should be taken of the following: a) Cables in free air should not be so installed that the natural air convection is impeded. When cables are covered or embedded in thermal insulation
39、or when the heat dissipation is impeded by other means, it is essential that the corresponding reduction of the current carrying capacity be observed. b) The temperature of cable sheaths can be significantly higher than the ambient temperatures, where the cables are subjected to radiation, e.g. sola
40、r or infrared. Where these situations cannot be avoided their effect should be taken into account in assessing the current carrying capacity or the temperature of the cable relative to the limiting conditions. c) Account should be taken of the temperatures occurring within equipment, appliances, lum
41、inaires and at their terminals, in selecting the types of termination to be used. Cables should be selected, located and installed so that their intended heat dissipation is not 5.4.2 inhibited and they do not present a fire hazard to adjacent materials. 5.4.3 In the event of a fire, cables can prov
42、ide a source of fuel and a means of propagating a fire along their length. This hazard may be eliminated by using bare copper sheathed mineral insulated cable. Where covered mineral cables are used the amount of combustible material is small and the hazard may be reduced by selecting a covering mate
43、rial with reduced flame propagation characteristics. Where a particular hazard exists or is likely to exist in the presence of explosive or flammable atmospheres, specific regulations apply. It is essential that the requirements of these regulations be taken into account in selecting the current car
44、rying capacity and the type of cable termination to be used. 5.4.4 When the cable is installed not exposed to touch and the current is such that the cable sheath exceeds 70 OC, the cable shall be bare copper and shall be so located or guarded as to prevent contact of persons or animals therewith and
45、 it shall not be in contact with combustible material. When installed in such conditions cable need not be derated when used in groups. 5.4.5 specified by the manufacture. Cable terminations should be selected such that they are operated within the temperature limits 6 BS 6207-3:2001 5.5 Mechanical
46、stress 5.5.1 General In assessing risks of mechanical damage to cables account should be taken of mechanical strains likely to be imposed during the normal process of installation. 5.5.2 Tension The tension applied to a cable should not exceed 50 N/mm2 per conductor, subject to a maximum of 1 O00 N
47、unless otherwise agreed by the cable manufacturer. 5.5.3 Bending The internal radius of every bend in a cable should not cause damage to the cable. a) The internal radius of every bend should not be less than six times the cable diameter; this will allow bends to be straightened and repositioned. Be
48、nds with a smaller radius may be permitted provided that the bend is a once only bend that is not reworked: such bends should not be less than 3 times the cable diameter. b) Cables which are installed vertically, without intermediate support, which are inaccessible and unlikely to be disturbed, shou
49、ld be supported at the top of the run such that the internal radius of the resultant bend is not less than 6 times the cable diameter. 5.5.4 Compression Whilst mineral insulated cables possess significant resistance to compression and deformation, the installation and use of the cable should not be designed to make use of these characteristics. 5.6 Compatibility 5.6.1 The possibility of interference between adjacent circuits either mechanical or electrical should be avoided. The solid copper sheath of mineral insulated cables provides an electrical screen. To maximise
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