The use and specifications of various cables, the correct representation of cables
The wire and cable representation method is mainly composed of three parts: model, specification and standard number. The following is about the use and specifications of various cables and the correct representation of cables, welcome to learn
1. The meaning of the model
The models of wires and cables and power cables for electrical equipment are mainly composed of the following seven parts:
Some special wire and cable models have a derivation code at the end. The meaning of the letters in the most commonly used wire and cable models is described below:
Category, use code
A – Mounting wire B – Insulated wire C – Marine cable
K-control cable N-agricultural cable R-flex wire
U-Mining cable Y-Mobile cable JK-Insulated overhead cable
M – For coal mines
ZR-flame retardant NH-refractory ZA-A grade flame retardant
ZB-B grade flame retardant ZC-C grade flame retardant WD-low smoke halogen free type
T—copper wire (slightly) L-aluminum core
V—PVC plastic YJ—XLPE insulation
V-PVC sleeve Y-polyethylene
N-nylon sheath P-copper wire braided shield P2-copper strip shield
L-cotton yarn woven waxed gram Q-lead bag
B – Flat type R – Soft
C – Heavy Q – Light
G-high voltage H-electric welding machine
Armor layer codename
2—Double steel strip 3—Thin round steel wire
4—Thick round steel wire
Outer cladding code
1—Fiber layer 2—PVC sleeve
2. Examples of the most commonly used wires and cables and power cables for electrical equipment
VV – copper core PVC insulated PVC sheathed power cable
VLV – Aluminum core PVC insulated PVC sheathed power cable
YJV22—copper core XLPE insulated steel strip armored PVC sheathed power cable
KVV – PVC insulated PVC sheathed control cable
227IEC 01 (BV) – BV for short, general purpose single-core hard conductor unsheathed cable
227IEC 02(RV)—RV for short, general purpose single-core soft conductor unsheathed cable
227IEC 10 (BVV) – BVV for short, lightweight PVC sheathed cable
227IEC 52 (RVV)—RVV for short, lightweight PVC sheathed cord
227IEC 53 (RVV) – RVV for short, ordinary PVC sheathed flexible wire
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-duty rubber sheathed flexible cable
YZ, YZW – medium rubber sheathed flexible cable
YQ, YQW – light rubber sheathed flexible cable
The specification is composed of rated voltage, core number and nominal cross-section.
The general rated voltage of wires and control cables is 300/300V, 300/500V, 450/750V;
The rated voltage of medium and low voltage power cables is 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 wire and cable is determined according to actual needs, the general power cable mainly has 1, 2, 3, 4, 5 cores, the wire is mainly 1~5 cores, and the control cable has 1~61 cores.
The nominal cross-section is an approximation of the cross-section of the guide body. In order to achieve a specified DC resistance, an integer value near a conductor cross-section is specified for easy memory and unification. The conductor cross-section uniformly specified in China is 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, and 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.
Most of the countries or industries we produce wires and cables now have clear standards, and the main purpose is of course to make the design and use unified.
GB5023-1997 rated voltage 450/750V and below PVC insulated cable
JB8734-1998 rated voltage 450/750V and below PVC insulated cable wire and flexible wire
GB 5013-1997 rubber insulated cable with rated voltage 450/750V and below
GB/T12706-2002 rated voltage 1kV to 35kV extruded insulated power cable and accessories
GB/T 9330-1988 plastic insulated control cable
For more than 20 years, Kexun Wire and Cable Factory has won unanimous praise from many cooperative enterprises with its advantages of safety, reliability and environmental protection. The company has strong technical and R&D strength, and the project management products are power cables, electrical equipment lines, communication cables, special cables, control cables, computer cables, etc., and is a multi-in-one enterprise integrating R&D/production/marketing/supply/service.
High-quality product recommendation: UL2651 PVC Flat Cable.