Tinned annealed stranded circular copper IEC 60228 class 2
Ethylene Propylene Rubber (EPR)
Color coded cores twisted together to form a pair/triad
Pairs/triples are laid-up and collectively screened by copper backed polyester tape in contact with a stranded tinned copper drain wire. Pairs/tripes are identified by printed numbers on insulated conductors.
Flame retardant and halogen-free compound
Tinned annealed copper wire braid
Flame retardant, halogen-free and mud resistant thermoset compound, SHF MUD
Grey (if intrinsically safe: Blue)