Communication cables are cables that transmit telephones, telegraphs, fax documents, television and radio programs, data and other electrical signals. It is formed by twisting more than one pair of mutually insulated wires. Compared with overhead open wires, communication cables have the advantages of large communication capacity, high transmission stability, good confidentiality, and less affected by natural conditions and external interference.

What is a communication cable?
A communication cable is composed of a plurality of mutually insulated wires or conductors to form a cable core, and a communication line with a sealed sheath on the outside. Some are also equipped with an outer protective layer on the outside of the protective sleeve. There are a variety of laying methods such as overhead, direct buried, pipeline and underwater. According to the structure, it is divided into symmetrical, coaxial and integrated cables;
According to function, it is divided into field and permanent cables (underground and submarine cables). The communication cable has a wide transmission frequency band, a large communication capacity, and little external interference, but it is not easy to repair. It can transmit telephones, telegrams, data and images, etc.


The purpose of communication cable:
Communication cables refer to cables used for short-distance audio communication and long-distance high-frequency carrier and digital communication and signal transmission. It is one of the five major cable products in China. According to the purpose and scope of communication cables, they can be divided into six series of products: That is, local communication cables (including paper-insulated local telephone cables, polyolefin-insulated and polyolefin sheathed local telephone cables); Long-distance symmetrical cables (including paper-insulated high and low-frequency long-distance symmetrical cables, copper-core foamed polyethylene high and low-frequency long-distance symmetrical cables, and digital transmission long-distance symmetrical cables); Coaxial cables (including small coaxial cables, medium coaxial cables and micro coaxial cables); Submarine cables (can be divided into symmetrical submarine and coaxial submarine cables); Optical fiber cables (including traditional cable type, ribbon array type and skeleton type); Radio frequency cables (including symmetrical radio frequency and coaxial radio frequency).

In addition to the production of long-distance communication cables and local telephone cables in China. Optical fiber cables and polyolefin insulated composite sheathed all-plastic local telephone cables have also made considerable progress. Every year, China has a large number of polyolefin insulated and polyolefin sheathed all-plastic local telephone cables sold to Hong Kong, Macau, Southeast Asia, the Middle East, America, Europe and other places.


Classification model of communication cable
⑴. The model of the communication cable in the city:
HYA HYV HYAV HYAC (self-supporting) HYAT (washing oil) CPEV CPEV-S
⑵ Model of special communication cable for coal mine:
MHYA(PUYA) MHYV(PUYV) MHYAV(PUYAV) MHYVR(PUYVR)
⑶, shielded communication cable:
HYVP HYAP MHYVP MHYVP MHYVRP RVSP (shielded twisted pair)
⑷, armored communication cable:
HYA53 MHYA32 MHYV22 MHYAV22 MHYAV32 HYAT53 HYV22 HYV32 HYA32
HYV53 HYVP22 HYAP22 HYAP32 MHYVP22 MHYVP32 MHYVRP22 MHYVRP32
⑸, flame-retardant communication cable:
ZR-HYA ZRA-HYA ZA-HYA ZRC-HYA WDZ-HYA ZR-YJYR

Cable specifications

Specification	Aluminum strip thickness (mm)	Thickness of polyethylene sheath (mm)	Approximate cable diameter (mm)	Approximate cable weight (kg/km)	-20℃ Core DC resistance≤Ω/km
0.4×2×10	0.20	1.5	8.4	75	148.0
0.4×2×20	0.20	1.5	10.3	119
0.4×2×30	0.20	1.5	11.7	162
0.4×2×50	0.20	1.5	13.9	238
0.4×2×100	0.20	2.0	19.1	453
0.4×2×200	0.20	2.0	25.6	822
0.4×2×300	0.20	2.0	30.2	1175
0.4×2×400	0.20	2.5	35.6	1580
0.4×2×500	0.20	2.5	39.1	1928
0.4×2×600	0.20	2.5	42.2	2273
0.4×2×800	0.20	2.5	47.8	2956
0.4×2×1000	0.20	3.0	54.5	3724
0.4×2×1200	0.20	3.0	59.1	4404
0.4×2×1600	0.20	3.5	68.1	5855
0.4×2×1800	0.20	3.5	71.8	6530
0.4×2×2000	0.20	3.5	75.2	7202
0.5×2×10	0.20	1.5	9.6	100	95.0
0.5×2×20	0.20	1.5	11.9	165
0.5×2×30	0.20	1.5	13.6	229	95.0
0.5×2×50	0.20	1.5	16.4	436
0.5×2×100	0.20	2.0	22.6	664
0.5×2×200	0.20	2.0	30.7	1225
0.5×2×300	0.20	2.5	37.5	1804
0.5×2×400	0.20	2.5	43.0	2373
0.5×2×500	0.20	2.5	47.3	2909
0.5×2×600	0.20	3.0	52.3	3522
0.5×2×800	0.20	3.0	59.3	4590
0.5×2×1000	0.20	3.5	67.4	5761
0.5×2×1200	0.20	3.5	73.1	6822
0.5×2×1600	0.20	4.0	84.1	9055
0.5×2×1800	0.20	4.0	88.7	10049
0.5×2×2000	0.20	4.0	93.0	11190
0.6×2×10	0.20	1.5	10.7	130	65.8
0.6×2×20	0.20	1.5	13.4	219
0.6×2×30	0.20	1.5	15.5	304
0.6×2×50	0.20	2.0	19.9	499
0.6×2×100	0.20	2.0	26.1	905
0.6×2×200	0.20	2.5	36.9	1749
0.6×2×300	0.20	2.5	43.8	2524
0.6×2×400	0.20	3.0	51.4	3374
0.6×2×500	0.20	3.0	56.6	4140
0.6×2×600	0.20	3.5	62.3	4995
0.6×2×800	0.20	3.5	70.7	6516
0.6×2×1000	0.20	4.0	80.3	8162
0.8×2×10	0.20	1.5	12.9	167	36.8
0.8×2×20	0.20	1.5	16.6	351
0.8×2×30	0.20	2.0	20.4	527
0.8×2×50	0.20	2.0	24.9	816
0.8×2×100	0.20	2.5	35.1	1572
0.8×2×200	0.20	2.5	47.2	2950
0.8×2×300	0.20	3.0	57.4	4384
0.8×2×400	0.20	3.5	67.2	5843