Identify BVR, BV and RV wires and cables？

1. The difference between BVR, BV and RV wire and cable.

1. The difference between B and R, the former is a cable (wire) for fixed wiring, and the latter is a flexible wire for connection.

2. The difference between BV, BVR and RV is the conductor structure. In general, BV uses the first conductor, BVR uses the second conductor, and RV uses the fifth conductor.

3. BV is generally a single core wire with a hard conductor; while BVR is a soft conductor; the two resistance values are the same. The RV is softer than them, and the insulation requirements are different.

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