The full name of BV is copper core PVC insulated cloth wire, strictly following the GB/T 5023.3-2008 national standard, rated voltage 450/750V, single solid oxygen-free copper conductor, suitable for low-voltage fixed power distribution in buildings and factories, meeting fire inspection standards.

BV: solid hard core, suitable for embedding in walls and long-term fixed wiring, secure connections, cost-effective
BVR: multi-strand soft copper, suitable for ceilings, multiple bends, and frequent bending situations, not suitable for deep embedding.

Model suffix explanation:
ZR-BV: Class B flame retardant, mandatory for public places
NH-BV: fire-resistant type, special for fire emergency circuits, provides short-term continuous power during fires.