In the wire system, the sheathed wire is a crucial component, which is not only responsible for protecting the wire, but also to ensure the safety of the transmission of the wire. This article will delve into four common copper sheathed wires :BV, BVVB, RVV, RVVB, and their differences and applications.

First, the classification and model meaning of the sheath line

The classification of the sheath line can be carried out from multiple angles, among which the common classification is based on the core material and the sheath material. Copper sheathed wire mainly has BVV, BVVB, RV, RVVB four kinds, of which BVV and BVVB are hard sheathed wire, suitable for fixed installation; RVV and RVVB are soft sheathed cables for applications requiring flexible movement.

In terms of model meaning, for example:
"B" stands for cloth wire, that is, PVC insulated copper core wire;
The "V" stands for polyvinyl chloride (PVC), used for insulation and sheathing;
"R" stands for flexible wire, that is, soft copper wire;

"L" is usually used for aluminum cores;

"B" is also sometimes used to denote braided layers, increasing mechanical strength

Two, pick skills
When choosing a sheathed line, consumers should first determine whether they need a soft sheathed line or a hard sheathed line. Hard sheathed cables (e.g. BVV, BVVB) are suitable for fixed wiring systems such as lighting and outlet circuits in homes and offices. Soft sheathed wires (e.g. RVV, RVVB) are suitable for applications that require flexibility, such as mobile devices, sensors, and control circuits. Home safety is important, so choosing a sheath line that meets national safety standards is critical. Identify the brand and logo, check whether the insulation layer and the sheath layer of the sheath line are uniform, and whether the color is consistent, to ensure its quality and safety.

Third, performance analysis
1. Tolerance: The sheath line needs to withstand different environmental conditions, including temperature changes, so the sheath material must have good temperature resistance to ensure that it can still work normally in cold weather conditions.
2. Environmentally friendly materials: modern society attaches increasing importance to environmental protection, so the sheath line is usually made of environmentally friendly materials to reduce the impact on the environment.
3. Service life: the sheath line should generally have a long service life, reduce the frequency of replacement, and save costs.
4. Insulation performance: The insulation performance of the sheathed wire is crucial, and it must be ensured that there will be no leakage or short circuit under normal conditions of use. Security incident.
5. Easy to use: the installation and wiring of the sheath line should be as convenient as possible, saving time and labor.