Hello, RVS and BV cables are insulated PVC unsheathed cables, but RVS are twisted pairs, just like two wires twisted together, and they are multi-core flexible cables, but the structures of different colors will not be different because of different colors. It depends on Party A's needs, and generally it is good to divide colors according to different application ranges. BV cable is a single-core hard wire with only one wire, which is not so strict.

If the power is connected, you should use BV line. If the light is connected, it depends on personal preference. Both can be used, but BV's multi-RV is mainly used for fire fighting.

If you have any questions, please ask. If there is no problem, please adopt it.