BVR wire (flexible wire)

BVR wire, short for Polyvinyl Chloride Insulated Copper Core Flexible Wire, is a flexible wiring material composed of multiple strands of fine copper wires twisted together. The letters indicate: B: Building wire (fixed installation); V: Polyvinyl Chloride (PVC) insulation layer; R: Flexible conductor (distinguished from the rigid conductor of BV). Structural composition (from inside to outside): 1. Conductor: Multiple strands of fine copper wire twisted together (commonly 7 strands/19 strands), cross-sectional area ranging from 0.75 to 185 mm² (2.5 mm² and 4 mm² are commonly used in home decoration). 2. Insulation layer: PVC material, thickness the same as BV wire (e.g., 2.5 mm² insulation is approximately 0.8 mm thick), various colors (red/blue/yellow-green, etc.).