This European Standard specifies the characteristics of UV laser printable, nickel plated copper conductor, electrical cables Crosslinked Ethylene Tetra Fluoro Ethylene co-polymer XLETFE family for use in the on - board electrical systems of aircraft at operating temperatures between – 65 ºC and 150 ºC, operating at voltages not exceeding 600 V r.m.s and frequencies not exceeding 2 000 Hz. These cables are intended for use as cores for jacketed cables or within equipment in areas where combinations of high vibration, cable flexing and fluid contamination are normal. In case of conflict between this European Standard and other referenced documents the requirements of this European Standard should take precedence.