This part of IEC 60794 is a detail specification. It gives detailed requirements for cables to be used in cords which are intended for use in a category C environment@ according to IEC 61753-1. They are characterized with temperature range between ?C10 ??and +60 ?? The fibre requirements for this specification are defined in IEC 60793-2-10 for multimode fibres and IEC 60793-2-50 for single-mode fibres. Some deviation to family specification IEC 60794-2-50 requirements is allowed in certain clauses of this specification.