BV cable, also known as hard wire, is commonly used in home decoration. Different BV cable colors represent different meanings. Below, we'll explain what BV cable means, its structure, and the colors and usage rules of BV cable.
1. What does BV cable mean?
First, let's review the basics of wire model designation and name. The correct name for BV cable is: copper-core PVC insulated wire. From the inside out, it consists of a copper conductor and PVC, which is commonly known as "plastic." The PVC wraps around the inner copper conductor. The core is oxygen-free copper (Oxygen-free copper is the most conductive material currently available for wires and cables, boasting excellent conductivity and a high melting point).
2. BV cable structure and material
1. Classification and Application: BV cable is used to distribute current and belongs to the distribution wire category, designated by the letter B.
2. The insulation material is PVC, designated by the letter V.
3. BV cables have a simple structure, and some have a sheath. The sheath material is PVC and is also designated by the letter V. For example, BVV cable stands for copper-core PVC-insulated, PVC-sheathed round cable.
4. Operating Temperature: The long-term operating temperature should not exceed 70°C.
5. Rated Voltage: 450/750V
III. BV Cable Colors and Usage Rules
BV cables generally come in eight colors: red, yellow, blue, green, black, white, brown, and two-color (yellow-green). Typically, red, yellow, and green are used as the live wire (L); blue is used as the neutral wire (N); two-color is used as the ground wire (PE); and black, white, and brown are used as the backup wire.
IV. BV Cable Classification
Common, flame-retardant, fire-resistant, and low-smoke, halogen-free types. Flame-retardant types are further divided into Class A, Class B, and Class C, while fire-resistant types are divided into single and double fire-resistant layers.
V. How much square footage of BV cable should I choose? Scope of use:
A bundle of wire is 100 meters long, with a tolerance of 0.5 meters. Some vendors also offer short-cut wire, which meets the needs of some users who purchase wire in small quantities.
1. Common specifications include 1 square meter, 1.5 square meter, 2.5 square meter, 4 square meter, 6 square meter, and 10 square meter.
2. Single-core BV 2.5 square meter wire is commonly used for sockets.
3. Single-core BV 4 square meter wire is used for air conditioners with a capacity of 3 hp or higher. Three rolls of wire are used in sets of three (for the neutral, live, and ground wires).
4. Single-core BV 1.5 square meter wire is used for lighting fixtures. Two rolls of wire are used in sets of two (for the neutral and live wires).
5. Single-core BV 6 square meter wire is used for the main service bus.
6. The live wire is generally yellow, green, or red, the neutral wire is blue, and the ground wire can be a yellow-green double-color wire.
7. Two-core and three-core sheathed cables are used for open wiring and are mostly used on construction sites. They are rarely used in home renovations. Three-core sheathed 2.5 square meter wire can be used for cabinet air conditioners.
