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BS EN 50264 Code designations

The cable shall be identified by one or two letters, the first of which shall identify the insulation compound, and the second the sheathing compound (where applicable).

Insulation system

C  EI 106
F  EI 107
J  EI 108
M  EI 109
O  EI 110

Sheath system

C  EM 101
F  EM 102
J  EM 103
M  EM 104

Additional letters shall be added after the code designation to identify specific cable parameters, as follows:
S cable with metallic screen

Cables shall be marked with the following:
• manufacturer's name;
• EN reference;
• voltage rating (Uo);
• conductor size;
• a code designation according to Annex A.
An example of a complete mark is:
XYZ EN 50264-2-1 1800 V 400 FF