Cable people must know the uses and specifications of various cables.The representation method of wires and cables is mainly composed of three parts:model,specification and standard number.The following are the uses,specifications and models of various cables and the correct notation of cables organized by HengYi HDMI China Extruder Machine Manufacturer.Welcome to learn!

　　1.The meaning of the model

　　The types of wires and cables for electrical equipment and power cables are mainly composed of the following seven parts:

　　Some special wire and cable models have derivative codes at the end.The meaning of the letters in the most commonly used wire and cable models is introduced below:

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　　1)Category,purpose code

　　A-Installation wire B-Insulation wire C-Marine cable

　　K-control cable N-agricultural cable R-soft wire

　　U-mine cable Y-mobile cable JK-insulated overhead cable

　　M-for coal mine

　　ZR-flame retardant NH-fire-resistant ZA-A class flame retardant

　　ZB-B level flame retardant ZC-C level flame retardant WD-low smoke and halogen-free type

　　2)Conductor code

　　T—copper wire(abbreviated)L—aluminum core

　　3)Insulation layer code

　　V—PVC plastic YJ—XLPE insulation

　　X—rubber Y—polyethylene material

　　F—polytetrafluoroethylene

　　4)Sheath code

　　V-PVC sleeve Y-polyethylene material

　　N-nylon sheath P-copper braided shielding P2-copper tape shielding

　　L-Cotton Yarn Woven Waxed Gram Q-Lead Bag

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　　5)Feature code

　　B-flat type R-soft

　　C-Heavy Duty Q-Light Duty

　　G-high voltage H-welding machine

　　S-twisted pair

　　6)Armor layer code

　　2—double steel belt 3—thin round steel wire

　　4—thick round steel wire

　　7)Outer sheath code

　　1—fiber layer 2—PVC sleeve

　　3—PE sleeve

　　2.Model examples of the most commonly used wires and cables for electrical equipment and power cables

　　VV—copper core PVC insulated PVC sheathed power cable

　　VLV—Aluminum core PVC insulated PVC sheathed power cable

　　YJV22—copper core XLPE insulated steel tape armored PVC sheathed power cable

　　KVV—PVC insulated PVC sheathed control cable

　　227IEC 01(BV)—referred to as BV,general-purpose single-core hard conductor unsheathed cable

　　227IEC 02(RV)—referred to as RV,general-purpose single-core soft conductor unsheathed cable

　　227IEC 10(BVV)—BVV for short,light PVC sheathed cable

　　227IEC 52(RVV)—referred to as RVV,light PVC sheathed cord

　　227IEC 53(RVV)—RVV for short,ordinary PVC sheathed cord

　　BV—copper core PVC insulated wire

　　BVR—copper core PVC insulated flexible cable

　　BVVB—copper core PVC insulated PVC sheathed flat cable

　　JKLYJ—XLPE insulated overhead cable

　　YC,YCW—heavy rubber sheath flexible cable

　　YZ,YZW—medium-sized flexible cable with rubber sheath

　　YQ,YQW—light rubber sheath flexible cable

　　YH—welding machine cable

　　3.Specifications

　　Specifications are composed of rated voltage,number of cores and nominal cross-section.

　　The general rated voltages of wires and control cables are 300/300V,300/500V,450/750V;

　　The rated voltages of medium and low voltage power cables are generally 0.6/1kv,1.8/3kv,3.6/6kv,6/6(10)KV,8.7/10(15)kv,12/20kv,18/20(30)kv,21/35kv,26/35kv,etc.

　　The number of cores of wires and cables is determined according to actual needs.Generally,power cables mainly have 1,2,3,4,and 5 cores,wires mainly have 1 to 5 cores,and control cables have 1 to 61 cores.

　　The nominal cross section is the approximate value of the cross section of the conductor.In order to achieve the specified DC resistance,it is convenient to memorize and uniformly specify an integer value near a conductor cross section.The conductor cross-sections specified in my country are 0.5,0.75,1,1.5,2.5,4,6,10,16,25,35,50,70,95,120,150,185,240,300,400,500,630,800,1000,1200,etc.It should be emphasized here that the nominal cross-section of the conductor is not the actual cross-section of the conductor.Many of the actual cross-sections of the conductor are smaller than the nominal cross-section,and several are larger than the nominal cross-section.In the actual production process,as long as the DC resistance of the conductor can meet the specified requirements,it can be said that the cross section of the cable is up to standard.

　　4.Standard number

　　Most of the wires and cables we produce now have clear standards in countries or industries.The main purpose is of course to unify the design and use.Here I mainly introduce several wire and cable standard numbers related to the products produced by our company.

　　1)GB5023-1997 rated voltage 450/750V and below PVC insulated cables

　　2)JB8734-1998 rated voltage 450/750V and below PVC insulated cables,wires and cords

　　2)GB 5013-1997 rated voltage 450/750V and below rubber insulated cables

　　3)GB/T12706-2002 rated voltage 1kV to 35kV extruded insulation power cables and accessories

　　4)GB/T 9330-1988 plastic insulated control cables

　　5.Examples

　　a)VV-0.6/1 3×150+1×70 GB/T 12706.2-2002

　　Copper core PVC insulated PVC sheathed power cable,rated voltage 0.6/1kv,3+1 cores,the nominal cross-section of the main core is 150mm2,and the cross-section of the fourth core is 70mm2.

　　b)BVVB-450/750V 2×1.5 JB 8734.2-1998

　　Copper core PVC insulated PVC sheathed flat cable,rated voltage 450/750v,2 cores,nominal conductor cross section 1.5mm2.

　　c)YJLV22-8.7/10 3×120 GB/T 12706.3-2002

　　Aluminum core XLPE insulated steel tape armored PVC sheathed power cable,rated voltage 8.7/10kv,3 cores,the nominal cross-section of the main core is 120mm2.