Sheathed wire is generally categorized as BVV and RVV. The model letters indicate: B stands for cloth wire, R stands for soft wire, V stands for PVC insulation, and V stands for PVC sheath. Essentially, these two types of wire are the same; both are sheathed wires. However, there are some differences in their classification and construction. For example, BVV is a hard-sheathed wire, while RVV is a soft-sheathed wire.
What are the differences between BVV and RVV cables?
BVV cable stands for copper core PVC insulated and sheathed round sheathed wire, also known as lightweight PVC sheathed cable, commonly known as hard-sheathed wire. It is a type of sheathed wire.
RVV cable stands for lightweight copper core PVC insulated and sheathed flexible cable, also known as lightweight PVC sheathed flexible wire, commonly known as soft-sheathed wire. It is a type of sheathed wire.
What are the structural differences between BVV and RVV cables?
BVV cable has a single copper wire with a larger cross-section, while RVV cable has a single copper wire with a smaller cross-section. For example, both have a 2 x 1.5mm sheath.
BVV cable has a single copper wire core. BVV cable has two cores, each with a cross-section of 1.5mm, while each core is composed of a single copper wire with a diameter of 1.38mm.
RVV cable has a core composed of many small filaments. RVV cable has two cores, each with a cross-section of 1.5mm, but each core is composed of 30 copper wires with a diameter of 0.25mm. Therefore, BVV is harder than RVV.
RVV is used for power, control, and signal transmission cables in electrical appliances, instruments, electronic equipment, and automated systems. Specifically, it can be used in burglar alarm systems, building intercom systems, instrumentation, and surveillance control installations.
BVV hard-sheathed cable is suitable for power plants with AC voltages of 450/750V and below, household appliances, instruments, and telecommunications equipment. It is also used for surface-mounted wiring.
The above explains the differences between BVV and RVV cables. I believe everyone is familiar with the differences and advantages of the two. BVV cable is harder than RVV cable. RVV cable has a soft sheath, while BVV has a hard sheath. However, BVV cable is more expensive. Due to their different constructions, the applications of the two cables also differ. When choosing, it's important to choose the appropriate cable based on the environment.
