Detailed information on flame-retardant cables used in coal mines

Mining cable is the abbreviation for flame-retardant cable used in coal mines. According to the industry standard "Flame retardant cables for coal mines" issued by the State Administration of Coal Industry, the naming content of mining cables, that is, the meaning of the model of mining cables, is as follows.
1、 The naming of cables consists of eight parts:
******Part of it is the series code M, which is the pinyin of the coal character with ****** prefixes;
The second part is the use of characteristic codes, reflecting the occasions in which the cable is used. The meaning of the letters is as follows: C, used for coal mining machines; D， Used in low-temperature environments; M， Used for hat lamps; Y， For mobile coal mining equipment; Z， Used for electric drills.
The third part is the structural feature code, which represents the structural features of the cable. The meaning of the letters is as follows: B, weaving reinforcement; J， Equipped with monitoring cores; P， Non metallic shielding; PT， Metal shielding; Q， Lightweight; R， Strengthen the wrapping.
The fourth part is the material characteristic code, represented by E indicating that the insulation or sheath is made of elastic material. When both insulation and sheath are made of rubber, this section is omitted. E， Elastic material.
The fifth part is the rated voltage U0/U (KV).
The sixth part represents the number of power wire cores multiplied by the nominal cross-sectional area. The two are connected by a multiplication sign, with the unit being square millimeters.
The seventh part represents the number of ground wire cores multiplied by the nominal cross-sectional area. The two are connected by a multiplication sign, with the unit being square millimeters.
The eighth part represents the number of auxiliary wire cores multiplied by the nominal cross-sectional area. The two are connected by a multiplication sign, with the unit being square millimeters.
Connect the fourth and fifth parts with a "-"; Connect the sixth, seventh, and eighth parts with a "+".
2、 Product representation method for mining cables
The product is represented by model, specification, and standard number.
For example: 1) Shielded rubber sheathed flexible cable for coal mining machine, rated voltage of 00.6/1.14KV, power core of 3 * 50, ground core of 1 * 10, control core of 4 * 4, with a semi conductive shielding layer, represented as MCP-0.66/1.14 3 * 50+1 * 10+4 * 4 MT818.2-1999
2) Shielding and monitoring braided reinforced rubber sheathed flexible cable for coal mining machine, rated voltage of 0.66/1.14KV, power core 3 * 50, ground core 1 * 25, control core 2 * 2.5, with semi conductive shielding layer, monitoring core and braided reinforcement layer, represented as MCPJB-0.66/1.14 3 * 50+1 * 25+2 * 2.5 MT818.3-1999
3) Metal shielded monitoring rubber sheathed flexible cable for coal mining machine, rated voltage 0.66/1.14KV, power core 3 * 70, ground core 1 * 25, monitoring core 1 * 35, with metal shielding layer, represented as MCPTJ-0.66/1.14 3 * 70+1 * 35+1 * 35 MT 818.4-1999
4) Mobile elastic flexible cable for coal mines, rated voltage 0.38/0.66KV, power core 3 * 25, ground core 1 * 16, without shielding layer, represented as MYE-0.38/0.66 3 * 25+1 * 16 MT818.5-1999
5) Mobile metal shielded monitoring rubber sheathed flexible cable for coal mines, rated voltage 3.6/6KV, power core 3 * 35, ground core 3 * 16/3, monitoring core 3 * 2.5, with a semi conductive shielding layer, represented as MYPTJ-3.6/6 3 * 35+3 * 16/3+2.5 MT818.6-1999
6) Mobile shielded rubber sheathed flexible cable for coal mines, rated voltage 3.6/6KV, power core 3 * 25, ground core 1 * 16, used in low-temperature environments, with a semi conductive shielding layer, represented as MYDP-3.6/6 3 * 25+1 * 16 MT818.7-1999
7) Shielded elastic cable for coal mine electric drill, rated voltage 0.3/0.5KV, power core 3 * 4, ground core 1 * 4, expressed as MZPE-0.3/0.53 * 4+1 * 4 MT818.8-1999
8) Mobile lightweight rubber sheathed flexible cable for coal mines, rated voltage 0.3/0.5KV, insulated core 3 * 2.5, without shielding layer, expressed as MYQ-0.3/0.5 3 * 2.5 MT818.9-1999
9) Coal mine miner's hat lamp wire, insulated wire core 2 * 0.75, expressed as MM 2 * 0.75 MT818.10-1999
The above mining cable models refer to the regulations in MT818, and according to the national standard GB12972, the series code is U, which is the second letter of the mining character pinyin. Because the ****** letter K has been occupied by the control cable, the rest of the codes are basically the same.