Table 3: PVC sheathed twin & multi-core, copper

Table 9: Butyl & silicone twin & multi-core, copper

For comparison, here is a table from the previous Regs. This is taken from the ASEE Guide to the 13th Edition, 1955, as amended to December 1963:

Table 13: Twin & multi-core rubber/polythene/PVC insulated cables