1.all of the conductor are 99.99% annealed copper 2.according with GB/T5023, JB/T871 2.5mm Single Core BV Cable SpecificationsBestsingle core BV cable , easy for installation 1)Purity raw material 2)PVC single core cable 3)High pure rigid copper1 StandardGB 5023.11997 , JB 8734.15-1998, Q/ZEL 02-2002, GB 5023.17-1997, IEC2272 Voltages U0/U: 450/750V300/500V300/300V.(600/1000V also available)Max. ...