BS EN 50306-4 pdf free download

BS EN 50306-4-2020 pdf free download.Railway applications – Railway rolling stock cables having special fire performance – Thin wall – Part 4: Multicore and multipair screened or not screened sheathed cables.
All cables have stranded tinned copper conductors, halogen-free, thin wall thickness insulation and standard wall thickness sheath. Cable types are specified for use in exposed situations (Class E), and for protected situations (Class P). They are for use in railway rolling stock as fixed wiring or wiring where limited flexing in operation is encountered.
These cables are rated for occasional thermal stresses causing ageing equivalent to continuous operational life at a temperature of 90 °C. For standard cables this is determined by the acceptance test defined in EN 50305, using accelerated long-term (5 000 h) thermal ageing indicating a 110 °C120 000 h temperature index. If the customer were to require lifetime predictions this would be demonstrated based on the temperature index of the product as supplied by the manufacturer.
The maximum temperature for short circuit conditions is 160 °C based on duration of 5 s.
Under fire conditions the cables exhibit special performance characteristics in respect of maximum permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases. These requirements are specified to permit the cables to satisfy Hazard Level 3 of EN 45545-1 and EN 45545-2.
EN 50306-4:2020 is expected to be used in conjunction with EN 50306-1:2020, General requirements, EN 50306-2:2020, Single core cables, and EN 50306-3:2020, Single core and multicore cables.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.
EN 45545-1, Railway applications – Fire protection on railway vehicles – Part 1: General
EN 50264-1:2008, Railway applications – Railway rolling stock power and control cables having special fire performance – Part 1: General requirements
EN 50305:2020, Railway applications – Railway rolling stock cables having special fire performance – Test methods
EN 50306-1:2020, Railway applications – Railway rolling stock cables having special tire performance – Thin wall – Part 1: General requirements
EN 50306-2:2020, Railway applications – Railway rolling stock cables having special tire performance – Thin wall – Part 2: Single core cables
BS EN 50306-4:2 020
EN 50306-4:2020 (E)
EN 50306-3:2020, Railway applications – Railway rolling stock cables having special fire performance – Thin wall – Part 3: Single core and multicore cables screened and thin wall sheathed
EN 60332-1-2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure for I kWpre-mixed flame
EN 60332-3-24, Tests on electric and optical fibre cables under fire conditions – Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables – Category C
EN 61034-2, Measurement of smoke density of cables burning under defined conditions – Part 2: Test procedure and requirements
EN 60811 (all parts), Electric and optical fibre cables – Test methods for non-metallic materials
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISOOnhine browsing platform: available at https:/iwww.iso.orq/obp
— IEC Electropedia: available at httD:llwww .electropedia .orp/
4 Multicore cables – sheathed
4.1 General
The completed cables shall conform to the applicable general requirements given in EN 50306-1:2020 and to the specific requirements of Clause 4 and Clause 5.
Conformity with the requirements shall be checked by inspection and by the tests given in Table 2.
4.2 Marking and code designation
4.2.1 Marking of cable
Cables shall be marked with the following:
— Manufacturers name;
— EN reference;
— table number:
— cable class (P or E);
— Voltage rating (Uo);
— No. of cores and conductor size;
— A code designation according for use of the cable (see 4.2.2);
— Conductor temperature rating.BS EN 50306-4 pdf download.