電線電纜中BV、BLV等符號含義
The meaning of BV, BLV and other symbols in wire and cable
這些符號都是電線的一些型號，B系列歸類屬于布電線，所以開頭用B，電壓：300/500V 電線按用途分為電磁線和通用絕緣電線。絕緣電線又稱為布電線。
These symbols are some models of wires. Series B is classified as distribution wire, so it is used at the beginning, voltage: 300 / 500V. Wires are divided into electromagnetic wires and general insulated wires according to their uses. Insulated wire is also called cloth wire.
絕緣電線（布電線）是指包覆絕緣層的電線，包括各種連接線、安裝線。
Insulated wire (wiring) refers to the wire covered with insulating layer, including various connecting wires and installation wires.
V就是PVC聚氯乙烯，也就是（塑料）
V is PVC, PVC, or plastic
L就是鋁芯的代碼
L is the code of aluminum core
T就是銅芯的代碼（一般省略不寫）
T is the code of copper core
R就是(軟)的意思，要做到軟，就是增加導體根數
R means (soft). To be soft, it means to increase the number of conductors
BV銅芯聚氯乙烯絕緣電線
Bv copper core PVC insulated wire
BLV鋁芯聚氯乙烯絕緣電線
BLV aluminum core PVC insulated wire
BVR銅芯聚氯乙烯絕緣軟電線
BVR copper core PVC insulated flexible wire
以上電線結構：導體+絕緣
Above wire structure: conductor + insulation
拿2.5mm2為例：
Take 2.5mm2 as an example
BV是1根直徑1.78mm和7根0.68兩種
BV is 1.78mm in diameter and 7 0.68mm in diameter
BLV是1根直徑1.78mm
The BLV is 1. 78mm in diameter
BVR是19根直徑0.41mm
BVR is 19, diameter 0.41mm
RV銅芯聚氯乙烯絕緣連接軟電線
RV copper core PVC insulated connection flexible wire
它比BVR更軟，還是2.5是49根0.25mm銅絲
It is softer than BVR, or 2.5 is 49 pieces of 0.25mm copper wire
RVV銅芯聚氯乙烯絕緣聚氯乙烯護套連接軟電線
RVV copper core PVC insulated PVC sheathed connection flexible wire
比RV多了一層塑料護套
One more layer of plastic sheath than RV
另外：我們最常用的“護套線”
What's more, our most commonly used "sheath wire"
BVVB銅芯聚氯乙烯絕緣聚氯乙烯護套扁型電纜,就是2根BV線，在+一層白色的護套
BVVB copper core PVC insulated PVC sheathed flat cable is 2 bv wires, in + a layer of white sheath