... 0mmPVC*3Ccore+5.5mmPV2)PVC Copper Insulation Electrical Cable with Voltage of 300/500V 3)there are 0.75mm2; 1.0mm2 ... 5mm2; 2cores,3cores,4cores,5cores,6cores etc.Options:.Rated voltage 300/300V,300/500V.Reference standard :GB5023.5-1997. ... protected installation of wiring burglar alarm,public address system,intercoms,telephone stations, speakers,instrumentations, control and other low voltage circults. ...