What Difference BV, BVV, BVVB, BVR Cable Wire?
VV: the term refers to the two layer of PVC wire
BV: PVC insulated copper wire, single core wire
BVV:PVC sheathed copper wire, two wire
BVVB: PVC sheathed copper wire, three wire
BVR: copper core PVC insulation wire, flexible wiring fixed occasions.