1) Color
Screening core wire under four cores should be carried out depending on insulator surface color,
other suitable ways. White is good to become natural color of it.
double cores: black white
three cores: black, white, red
four cores: black, white, red, green
2) Number screening
Separated shield or for cables over five cores, wire cores screening is remarked on insulators by printing
continuous numbers
3) Other Screening
Screening wire cores insulated by over 5 cores XLPE can be signed by coloring surface of insulators, insulators, or other methods