BVR wire and cable, a leader in the interior decoration industry, is also known as "star cable." Its excellent flexibility, high insulation, and safe and stable operation make it widely used in interior decoration, home lighting, fire protection engineering, street lighting, and other applications. To briefly introduce the standards and features of BVR wire, let's take a look.
BVR wire's Chinese name: Copper Core PVC Insulated Soft-Sheathed Wire. Wire structure: Conductor + Insulation.
Common PVC insulated conductors include: BV, BLV, and BVR.
BVR wire complies with the JB/T8734.2-2012 standard and is commonly used for electrical wiring up to 450/750V. Available in sizes from 0.75 to 300V.
The letter B stands for wiring (for example, for indoor power lines, it's nailed to the wall). Voltage: 300/500V. The letter V stands for polyvinyl sheath (one V represents single layer of insulation, two Vs represent double layer of insulation), also known as the plastic insulation layer. L stands for aluminum wire; no L indicates copper wire. The letter R stands for flexible wire. To achieve flexibility, the number of conductors is increased and the diameter of each wire is reduced. Construction: The conductors are copper wires, with an average diameter of less than one millimeter.
Basic Features of BVR Insulated Wire
1. The six commonly used colors are red, yellow, green, blue, black, and yellow-green (ground wire).
2. The BVR structure consists of a copper core conductor and PVC insulation. The conductor insulation is primarily made of oxygen-free copper, consisting of multiple strands of copper wire, and the insulation is PVC.
3. The high number of cores and small diameter emphasize the flexible structure of the wire.
4. The long-term operating temperature is 70°C; the maximum operating temperature for the BVR-105 is 105°C. The ambient temperature during installation must not drop below 0°C and should be preheated if necessary.
5. BVR wires are available in three different properties: ZC flame-retardant, NH fire-resistant, and WDZ low-smoke halogen-free.
6. The allowable bend radius is 4D ≤ 25 ≤ 6D (D is the outer diameter of the wire). For wires with an outer diameter (D) less than 25mm, the radius should be no less than 4D; for wires with an outer diameter (D) of 25mm or greater, the radius should be no less than 6D.
7. The wire must withstand 50Hz AC voltage tests of 250V (450/750V) and 2000V (300/500V) for 5 minutes without breaking down.
BVR wire offers many advantages, most notably its flexible structure, ease of conduit routing, faster installation, and improved work efficiency. Therefore, it is highly favored by many construction and renovation professionals and widely used for indoor installations such as home appliances, lighting, and fixed wiring. Because BVR wire is so flexible, the required installation angle is significantly lower than that of BV wire. This article primarily explains the basics of BVR wire and will not delve into the differences between BVR and BV wires.
