DIN EN 2235:2015 pdf free.Aerospace series – Single and multicore electrical cables, screened and jacketed – Technical specification.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Iso 8815 and EN 3475-100 apply.
4 Materials and construction of cables
4.1 General The individual cores shall be qualified to EN 2083 or EN 4434, EN 2084 and the product standards.
4.2 Materials The materials shall conform to the product standard.
4.3 Construction of cables 4.3.1 General The permissible operating temperature of conductors shall not be lower than the maximum operating temperature of the cable as a whole.
4.3.2 Cabled cores The lay length of the outer lay shall not be less than eight times and not more than 16 times the nominal diameter of the cabled cores. The core shall not be spliced.
Where filler cores are used, this shall be specified in the product standard. 4.3.3 Screened cables 4.3.3.1 General The individual strands used for the screen shall be free from kinks, loops or breaks; their surface shall be free from corrosion and other contamination. They shall satisfy the mechanical tests in EN 3475-505 to EN 3475-508 before use. The screen shall be in contact with all the cabled cores. Where spiral screening is used, the lay direction shall be contrary to that of the cabled cores. 4.3.3.2 Joints Joints in the individual strands of the screen shall be made by soldering or by laying the individual strands together over a length of at least 10 mm. There shall be no more than one joint per 3 m cable length (measured between different individual strands). 4.3.3.3 Braid screen pushback capability In accordance with Table 1, test 6.48. 4.3.3.4 Angle of spiral screening or braiding The angle yof spiral screening or braiding (as shown in Figure 1), measured against the longitudinal axis of the cable shall be at least 100. 4.3.3.5 Screen coverage The screen shall have a coverage fiof at least 90 % for spiral screening and at least 85 % for braiding.DIN EN 2235 pdf download.