BS 6195 Code Designation

Type 4 cable, voltage categories A, C, D, E and F, for a designated temperature of 90 °C (flame retardant, rubber insulated coil leads);

Type 5 cable, voltage categories A, C, D, E and F, for a designated temperature of 180 °C (180 °C silicone rubber insulated coil leads).

Voltage category                    Maximum equipment test voltage (a.c.) r.m.s. kV
A                                             2.5
C                                             4.0
D                                             9.5
E                                             17
F                                              27

• for type 4 cable in voltage categories A and C, composite insulation type FR 1 as specified in BS 7655-1.5;

• for type 4 cable in voltage categories D, E and F, compositeinsulation type FR 2 as specified in BS 7655-1.5;

• for type 5 cable, insulation type EI 2 as specified in BS EN 50363-1.

for example :

TYPE 4C : max voltage 4 kV, FR1 insulation  90 °C .