01 BV, BLV and other symbols in wire and cable meaning these symbols are some models of wire, B series is classified as cloth wire, so the beginning with B, voltage: 300/500V wire is divided into electromagnetic wire and general insulated wire according to use. Insulated wire is also called cloth wire. Insulated wire (cloth wire) refers to the wire covered with insulation layer, including a variety of connection wires, installation wires. V is PVC, that is, (plastic)L is the code of aluminum core T is the code of copper core (generally omitted and not written)R is the meaning of (soft), to be soft, is to increase the number of conductors BV copper core PVC insulated wire BLV aluminum core PVC insulated wire BVR copper core PVC insulated soft wire above wire structure: conductor + insulation

Take 2.5mm2 as an example:

The BV is available in 1 diameter 1.78mm and 7 diameter 0.68

The BLV is 1 stick with a diameter of 1.78mm

The BVR is 19 pieces with a diameter of 0.41mm

RV copper core PVC insulated connection with soft wire

It is softer than the BVR, still 2.5 is 49 pieces of 0.25mm copper wire

RVV copper core polyvinyl chloride insulation polyvinyl chloride sheathed connection to soft wires

That's one more plastic sheathing than the RV

In addition: our commonly used "sheath line"

BVVB copper core PVC insulated PVC sheathed flat cable, that is, 2 BV wires, in a layer of white sheathed

02

What is sheathed wire

Sheathed wire refers to a single core or multi-core wire with a sheathed layer, which is safer with sheathed. To put it bluntly, we commonly use the "sheath line", a layer of white PVC sheath, which is covered with several BV lines. This kind of wire is generally a copper core wire, in addition to a layer of insulation outside the wire, there is a protective layer outside the wire. Commonly used sheath lines are RVV, BVV, RVVB, bvvb these models. Sheath line can be divided into hard sheath line and soft sheath line two kinds. According to the application environment and shape is divided into round sheath line and flat sheath line, round sheath line is generally multi-core, flat is generally single core.

03

What is YJV cable (YJV cable meaning)

[Full name] Cross-linked polyethylene insulated polyvinyl chloride sheathed power cable

Y---- polyethylene J---- crosslinked V---- polyvinyl chloride sheath

[core number] Single core, 2 core, 3 core, 4 core, 5 core, 3+1, 3+2, 4+1, etc

【 Specification 】1.5 square to 240 square

[Color] Black

[Copper] National standard oxygen-free copper (copper)

【 Sheath 】 Polyvinyl chloride PVC

[Standard] This product is produced according to GB12706 "Rated voltage 35KV copper core, aluminum core plastic insulated power cable" standard, and can also be customized according to user needs.

[Usage] Suitable for indoor, cable trench, pipeline, tunnel, etc., can also be buried in loose soil, can not withstand external force, generally for the circuit transmission of the main road, rated voltage for power line transmission and distribution.

[General rated voltage] (U0/U)0.6/1-- 26/35kv

【 Usage characteristics 】

1. The rated temperature of the cable conductor shall be 90° C. When the short circuit occurs (the duration shall not exceed 5S), the temperature of the cable conductor shall not exceed 250°C.

2. The ambient temperature during cable laying should not be lower than 0°C

3. The allowable bending radius when laying: the single-core cable is not less than 15 times the outer diameter of the cable; Multi-core cable not less than 10 times the outer diameter of the cable.

04

What cable is YC

YC rubber sheathed cable full name heavy general rubber sheathed flexible cable, is a kind of rubber sheathed cable. YC cable is suitable for household appliances with rated AC voltage below 450/750V, power tools and various mobile electrical equipment or light mobile electrical equipment, or for temporary construction on the site, and can withstand greater mechanical external force. The long-term allowable working temperature of the core should not exceed 60℃.

Y stands for rubber insulation and C stands for heavy-duty cable. The inner sheath is also rubber insulated, and the conductor is copper wire. Rubber cable is divided into heavy cable (yc cable), medium cable (yz cable) and light cable (YQ cable). The insulation layer of good YC cable is made of pure natural rubber, and the conductor is an oxygen-free copper rod with good electrical conductivity. At present, most products on the market are more or less unable to achieve this quality.

YC Cable Model:

YC cable is mainly multi-core cable, commonly used 2 core, 3 core, 4 core, 5 core, copper core area of 0.75 to dozens of square.

05

BV wire and cable knowledge

BV cable: Wire and cable is copper core polyvinyl chloride insulated wire and cable, referred to as plastic copper wire, is a commonly used wire and cable, and is also a line in our daily life.

Conductor material: oxygen free copper

Insulation material: PVC

Color: Black, yellow, blue, red, brown, white, etc

Operating temperature: 60 degrees, 70 degrees, 95 degrees

Rated voltage: 450/750V

The ambient temperature shall not be lower than 15 degrees below zero when laying the cable (line).

Cable allowable bending radius:

The outer diameter (D) of the cable is less than 25mm and not less than 4D;

The outer diameter (D) of the cable is 25mm and above should not be less than 6D.

The finished cable (wire) and cable core shall be subjected to power frequency spark withstand voltage test.

The mark of the cable (line) shall be executed according to the GB6995 standard, and the mark shall be clear and erasable.

National standard bv wire and cable for AC rated voltage 450/750V and below or DC voltage 1000V and below electrical equipment, instrumentation, decoration, telecommunications equipment, power lighting and lines, can be open or dark.

Product standard: GB5023.3-1997 JB8734-98 in line with IEC CCC standards, the national standard bv cable production certificate must be printed with 3C certification mark.

06

What does wDKR-BYJ mean

BYJ: Copper core crosslinked polyethylene insulated cloth wire 450/750V

Wdkr-byj: Copper core flame retardant halogen-free low smoke crosslinked polyethylene insulated cloth wire 450/750V

Product use: Wire and cable products for rated voltage 450/750V and below buildings, electrical appliances, switches and other power plant fixed wiring.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098