Classification of home improvement wires

BV wire, full name copper core PVC insulated wire, referred to as plastic copper wire. That is, a general-purpose single-core hard conductor non-sheathed cable with a diameter of 1mm or more.
It is suitable for wires used in power installations, household appliances, meters and telecommunication equipment with AC voltage of 450/750 and below. It has the characteristics of acid and alkali resistance, oil resistance, moisture resistance, mildew resistance, and long service life. Because it has a certain degree of hardness, it is more convenient in straightening and folding corners.

BVR wire is generally a wire twisted together by 19 copper wires with a diameter of less than 1mm. It is a copper core PVC insulated flexible wire.
The letter B stands for wiring (for example: make an indoor power line and tack it on the wall);
The letter V-polyvinyl chloride plastic sheath (a V stands for one layer of insulation and two V stands for double insulation), which is a plastic insulation layer.

L stands for aluminum wire, without L stands for copper wire.
The letter R stands for soft wire. To be soft, it means to increase the number of conductors and reduce the diameter of each wire.
It is suitable for the occasions where flexibility is required for wiring and the rated voltage is lower than 450/750 with slight movement. When multiple pipes are pierced at the same time, due to the low hardness, it is easy to turn and convenient for construction. Compared with the hard wire, the production is more complicated, and the high-frequency circuit has a larger carrying capacity than the hard wire.
Classification of common specifications and models of wires
Common specifications of wires are 1.5 square, 2.5 square, 4 square, 6 square, and 10 square. The square of the wire is square millimeters, which is the size of the cross-sectional area of ​​the wire.