Comprehensive Guide to MA (Mining Safety) Mark Requirements for MYP Cables
MA认证：MYP电缆在中国煤矿的矿用安全标志认证要求综合指南
MA Certificate: MYP Cable Certification for Chinese Coal Mines
Comprehensive Guide to MA (Mining Safety) Mark Requirements for MYP Cables MA认证：MYP电缆在中国煤矿的矿用安全标志认证要求综合指南Executive Summary 概述
Yes, MYP cables must obtain MA (煤安) certification before they can be legally used in Chinese coal mines. The MA mark, administered by the National Coal Mine Safety Mark Office (煤矿安全标志办公室), represents mandatory safety certification for all underground coal mining equipment and materials. MYP cables, as mobile power supply cables for coal mining machinery, fall under the strictly regulated product categories defined in the Mining Product Safety Sign Management Catalog and must comply with Chinese national standards MT 818 series and GB 12972.[1][2]
是的，MYP电缆在中国煤矿使用前必须获得MA（煤安）认证。由国家煤矿安全标志办公室管理的MA标志，代表了所有井下煤矿设备和材料的强制性安全认证。MYP电缆作为煤矿机械的移动电源电缆，属于《矿用产品安全标志管理目录》中严格管制的产品类别，必须符合中国国家标准MT 818系列和GB 12972。Mandatory Certification Requirement 强制认证要求
According to Chinese coal mine safety regulations, no unit or individual may sell, purchase, or use mining products included in the safety sign management catalog without obtaining valid MA certification. Violation of this requirement can result in severe penalties including production shutdowns, equipment confiscation, and significant fines. The MA certification system was established to prevent substandard equipment from entering coal mines, where inferior cable quality could lead to fire hazards, electrical failures, or catastrophic accidents.[3][4]
根据中国煤矿安全法规，任何单位或个人不得销售、购买或使用未获得有效MA认证的安全标志管理目录中的矿用产品。违反此要求可能导致严重处罚，包括停产整顿、设备没收和巨额罚款。建立MA认证体系是为了防止不合格设备进入煤矿，劣质电缆可能导致火灾隐患、电气故障或灾难性事故。Understanding MYP Cable Specifications MYP电缆技术规格
MYP designates a metallic-shielded, rubber-sheathed mobile flexible mining cable specifically engineered for power supply connections to coal mining machines and similar equipment. The abbreviation breaks down as M for mining use (矿用), Y for mobile application (移动), and P for metallic screen/shield (屏蔽). These cables feature Class 5 fine-stranded tinned copper conductors, ethylene propylene rubber (EPR) insulation, copper wire braided screening for electromagnetic interference protection, and chlorinated polyethylene (CPE) outer sheath providing oil and flame resistance.[5][6]
MYP表示金属屏蔽橡套移动软电缆，专为煤矿机械及类似设备的电源连接而设计。缩写分解为M代表矿用，Y代表移动应用，P代表金属屏蔽。这些电缆采用5类细绞镀锡铜导体、乙丙橡胶(EPR)绝缘、铜丝编织屏蔽层以保护电磁干扰，以及氯化聚乙烯(CPE)外护套提供耐油和阻燃性能。Voltage Ratings 额定电压
0.38/0.66 kV
0.66/1.14 kV
1.9/3.3 kV
三个电压等级Temperature Range 温度范围
Conductor: +65°C to +90°C
Ambient: -40°C to +45°C
导体：+65°C至+90°C / 环境：-40°C至+45°CCore Configuration 芯数配置
3+1 or 3+2 cores
3 power cores + ground/pilot[7]
3个动力芯+接地/导引芯Bending Radius 弯曲半径
Minimum 6× OD
Outer diameter multiple
最小外径的6倍Applicable Standards and Regulations 适用标准与法规
MYP cables must comply with multiple Chinese national and industry standards to qualify for MA certification. The primary regulatory framework consists of MT 818 series standards for coal mine cables, which specify comprehensive requirements for construction, materials, testing, and performance characteristics. For non-flame-retardant versions, manufacturers implement GB 12972 “Flexible Rubber Mining Cable,” while flame-retardant types must meet MT 818 specifications that include stringent fire resistance testing.[8][9]
MYP电缆必须符合多项中国国家和行业标准才能获得MA认证资格。主要监管框架由MT 818系列煤矿电缆标准组成，规定了结构、材料、测试和性能特征的全面要求。对于非阻燃版本，制造商实施GB 12972《矿用橡套软电缆》，而阻燃类型必须满足包括严格防火测试的MT 818规范。| Standard Reference 标准参考 | Specification Scope 规范范围 | Key Requirements 关键要求 |
|---|---|---|
| MT 818.1-2009 MT 818.1-2009 | General rules for movable flexible cables 移动软电缆通用规则 | Basic construction, conductor materials, voltage ratings 基本结构、导体材料、电压额定值 |
| MT 818.5-2009 MT 818.5-2009 | Flame-retardant specifications 阻燃规范 | Fire resistance, non-dripping when burning, smoke density 耐火性、燃烧不滴落、烟密度 |
| GB 12972 GB 12972 | Flexible rubber mining cable standards 矿用橡套软电缆标准 | Non-flame-retardant cable requirements, mechanical properties 非阻燃电缆要求、机械性能 |
| GB/T 3956 GB/T 3956 | Conductor classes and stranding 导体等级和绞合 | Class 5 flexibility, conductor resistance limits 5类柔软性、导体电阻限值 |
MA Certification Process MA认证流程
Obtaining MA certification for MYP cables involves a comprehensive evaluation process administered by the National Mining Safety Standards Center (CCSCS). The certification process typically requires six to twelve months from initial application to certificate issuance, depending on product complexity and manufacturer preparedness. Manufacturing enterprises must demonstrate compliance with safety production requirements, maintain complete technical documentation, and successfully pass factory audits, sample testing, and on-site evaluations.[10][11]
获得MYP电缆的MA认证涉及由国家矿用产品安全标志中心（CCSCS）管理的综合评估过程。认证过程通常需要六至十二个月，从初始申请到证书颁发，具体取决于产品复杂性和制造商的准备情况。制造企业必须证明符合安全生产要求，保持完整的技术文件，并成功通过工厂审核、样品测试和现场评估。Complete application forms with enterprise qualification documents, product technical specifications, and factory production capacity evidence.
完成申请表并附企业资质文件、产品技术规格和工厂生产能力证明。CCSCS evaluates documentation completeness, verifies enterprise legitimacy, and determines product categorization within safety mark catalog.
CCSCS评估文件完整性，验证企业合法性，确定产品在安全标志目录中的分类。Laboratory testing of cable samples including electrical performance, mechanical strength, flame retardance, and environmental resistance.
电缆样品的实验室测试，包括电气性能、机械强度、阻燃性和环境耐受性。On-site inspection of manufacturing facilities, quality control systems, production equipment, and testing capabilities.
对制造设施、质量控制系统、生产设备和测试能力进行现场检查。Expert panel reviews test results, production documentation, and conformity to MT 818 and GB 12972 requirements.
专家组审查测试结果、生产文件以及对MT 818和GB 12972要求的符合性。Upon successful completion, CCSCS issues MA certificate with unique safety mark number and QR code verification.
成功完成后，CCSCS颁发带有唯一安全标志编号和二维码验证的MA证书。Technical Testing Requirements 技术测试要求
MA certification testing for MYP cables encompasses extensive laboratory evaluations designed to verify that cables can withstand the harsh conditions encountered in underground coal mining environments. Test protocols examine electrical characteristics including conductor resistance, insulation resistance at elevated temperatures, voltage withstand capacity, and dielectric strength. Mechanical testing evaluates tensile strength, elongation at break, tear resistance, and repeated flexing durability to ensure cables maintain structural integrity under continuous mechanical stress.[12][13]
MYP电缆的MA认证测试包括广泛的实验室评估，旨在验证电缆能够承受井下煤矿环境中遇到的恶劣条件。测试方案检查电气特性，包括导体电阻、高温下的绝缘电阻、耐压能力和介电强度。机械测试评估拉伸强度、断裂伸长率、撕裂强度和反复弯曲耐久性，以确保电缆在持续机械应力下保持结构完整性。| Test Category 测试类别 | Test Items 测试项目 | Pass Criteria 合格标准 |
|---|---|---|
| Electrical Performance 电气性能 | Conductor DC resistance 导体直流电阻 | Within tolerance per GB/T 3956 符合GB/T 3956公差 |
| Electrical Performance 电气性能 | Insulation resistance at 90°C 90°C绝缘电阻 | ≥0.01 MΩ·km ≥0.01兆欧·千米 |
| Electrical Performance 电气性能 | AC voltage withstand 交流耐压 | 3.5 kV for 5 minutes (0.66/1.14kV cables) 3.5千伏5分钟（0.66/1.14kV电缆） |
| Flame Retardance 阻燃性能 | Vertical flame test per MT 818.5 MT 818.5垂直燃烧测试 | Self-extinguishing, no dripping 自熄、不滴落 |
| Mechanical Properties 机械性能 | Tensile strength of sheath 护套抗拉强度 | ≥10.0 MPa ≥10.0兆帕 |
| Mechanical Properties 机械性能 | Elongation at break 断裂伸长率 | ≥250% ≥250% |
| Environmental Resistance 环境耐受性 | Oil resistance immersion 耐油浸泡 | Mass change ≤+15% 质量变化≤+15% |
| Environmental Resistance 环境耐受性 | Cold impact at -40°C -40°C低温冲击 | No cracks or breaks 无裂纹或断裂 |
Flame Retardant Performance Standards 阻燃性能标准
Given the explosive atmosphere risk in coal mines from methane gas and coal dust, flame retardant characteristics represent the most critical safety feature of MA-certified MYP cables. MT 818.5 standard mandates that cable insulation and sheath materials must be self-extinguishing when exposed to open flame, producing minimal smoke and toxic gases. The vertical flame test requires that after 60 seconds of exposure to a standardized burner flame, the cable must self-extinguish within 60 seconds of flame removal, and any burning debris must not ignite a cotton indicator placed below the test specimen.[14][15]
鉴于煤矿中甲烷气体和煤尘造成的爆炸性气氛风险，阻燃特性是MA认证MYP电缆最关键的安全特征。MT 818.5标准要求电缆绝缘和护套材料在接触明火时必须自熄，产生最少的烟雾和有毒气体。垂直燃烧测试要求在暴露于标准化燃烧器火焰60秒后，电缆必须在火焰移除后60秒内自熄，任何燃烧碎片不得点燃放置在测试样品下方的棉花指示物。Anti-Static Requirements 防静电要求
Beyond flame retardance, MA-certified MYP cables must also possess anti-static properties to prevent electrostatic discharge that could ignite explosive atmospheres. The outer sheath surface resistance must not exceed 3×10⁹ ohms, ensuring that any accumulated static charge dissipates rapidly to ground. This requirement is particularly important for cables used with shearer loaders, continuous miners, and other mobile equipment that generates significant friction during operation.[16]
除了阻燃性，MA认证的MYP电缆还必须具备防静电性能，以防止可能点燃爆炸性气氛的静电放电。外护套表面电阻不得超过3×10⁹欧姆，确保任何累积的静电荷迅速释放到地面。这一要求对于与采煤机、连续采煤机和其他在运行过程中产生显著摩擦的移动设备一起使用的电缆尤为重要。Documentation Requirements 文件要求
Manufacturers seeking MA certification must prepare comprehensive technical documentation that demonstrates product compliance and manufacturing capability. Essential documents include detailed product specifications with complete technical drawings showing cable construction, cross-sectional views, and dimensional tolerances. Process documentation must outline production workflows, quality control procedures, raw material sourcing and inspection protocols, and routine testing methodologies. The quality management system should align with ISO 9001 principles, incorporating documented procedures for non-conforming product handling, corrective actions, and continuous improvement initiatives.[17][18]
寻求MA认证的制造商必须准备综合技术文件，证明产品合规性和制造能力。基本文件包括详细的产品规格，以及显示电缆结构、横截面视图和尺寸公差的完整技术图纸。过程文件必须概述生产工作流程、质量控制程序、原材料采购和检验协议以及常规测试方法。质量管理体系应与ISO 9001原则保持一致，纳入不合格产品处理、纠正措施和持续改进计划的记录程序。Certificate Validity and Maintenance 证书有效期与维护
MA certificates remain valid for five years from the date of issuance, subject to annual surveillance audits by CCSCS inspectors. These audits verify that certified manufacturers continue producing MYP cables according to approved specifications and maintain quality control systems at required levels. Manufacturers must promptly report any significant changes to product design, manufacturing processes, or raw material suppliers, as these modifications may require supplementary testing or certificate amendment. Certificate renewal applications should be initiated at least six months before expiration to ensure continuous authorization for coal mine supply.[19][20]
MA证书自颁发之日起五年内有效，但需接受CCSCS检查员的年度监督审核。这些审核验证经认证的制造商继续按照批准的规格生产MYP电缆，并将质量控制系统维持在要求的水平。制造商必须及时报告产品设计、制造工艺或原材料供应商的任何重大变更，因为这些修改可能需要补充测试或证书修订。证书续期申请应在到期前至少六个月启动，以确保煤矿供应的连续授权。Common Application Scenarios 常见应用场景
MA-certified MYP cables serve as the primary power transmission solution for mobile mining equipment operating in underground coal extraction environments. The metallic shielding provides essential protection against electromagnetic interference generated by variable frequency drives controlling shearer motors, conveyor systems, and hydraulic roof supports. These cables must withstand constant dragging across rough mine floors, exposure to coal dust and water, and frequent coiling and uncoiling during equipment repositioning. The combination of flexibility, mechanical strength, and electrical reliability makes MYP cables indispensable for modern mechanized coal mining operations.[21][22]
MA认证的MYP电缆是在井下煤炭开采环境中运行的移动采矿设备的主要电力传输解决方案。金属屏蔽层提供针对变频驱动器控制采煤机电机、输送系统和液压支架产生的电磁干扰的必要保护。这些电缆必须承受在粗糙矿井地板上的持续拖曳、暴露于煤尘和水中以及设备重新定位期间的频繁卷绕和展开。灵活性、机械强度和电气可靠性的结合使MYP电缆对现代机械化采煤作业不可或缺。| Equipment Type 设备类型 | Typical MYP Configuration 典型MYP配置 | Key Requirements 关键要求 |
|---|---|---|
| Shearer Loader 采煤机 | MYP 0.66/1.14kV 3×50+1×16mm² MYP 0.66/1.14千伏 3×50+1×16平方毫米 | High flexibility, frequent bending, EMI shielding 高柔韧性、频繁弯曲、电磁干扰屏蔽 |
| Continuous Miner 连续采煤机 | MYP 0.66/1.14kV 3×70+1×25mm² MYP 0.66/1.14千伏 3×70+1×25平方毫米 | Abrasion resistance, heavy current capacity 耐磨性、大电流容量 |
| Roadheader 掘进机 | MYP 0.66/1.14kV 3×95+1×35mm² MYP 0.66/1.14千伏 3×95+1×35平方毫米 | Robust sheath, rock debris resistance 坚固护套、抗岩石碎片 |
| Mine Locomotive 矿用机车 | MYP 1.9/3.3kV 3×25+1×10mm² MYP 1.9/3.3千伏 3×25+1×10平方毫米 | Higher voltage rating, compact design 更高电压等级、紧凑设计 |
| Shuttle Car 梭车 | MYP 0.66/1.14kV 3×35+1×10mm² MYP 0.66/1.14千伏 3×35+1×10平方毫米 | Moderate flexibility, repeated coiling 中等柔韧性、反复卷绕 |
Verification and Authentication 验证与认证
Coal mine operators and procurement personnel can verify the authenticity of MA certification through multiple official channels maintained by CCSCS. Each valid certificate bears a unique identification number and QR code that can be scanned or manually entered into the National Mining Product Safety Mark Query System (全国矿用产品安全标志查询系统). The online database provides real-time verification of certificate status, validity period, approved product specifications, and certified manufacturer details. Counterfeit MA marks represent a serious safety violation and criminal offense in China, with perpetrators facing substantial fines and potential imprisonment.[23][24]
煤矿运营商和采购人员可以通过CCSCS维护的多个官方渠道验证MA认证的真实性。每个有效证书都有一个唯一的识别号和二维码，可以扫描或手动输入到全国矿用产品安全标志查询系统中。在线数据库提供证书状态、有效期、批准的产品规格和认证制造商详细信息的实时验证。伪造MA标志在中国代表严重的安全违规和刑事犯罪，违法者面临巨额罚款和潜在监禁。References and Technical Sources 参考文献与技术来源
[1] Labsts Testing Services. “MA and KA Certificate – Coal Mine Safety Certification System in China.” Available at: https://www.labsts.com/en/safety-certification.html [2] Labsts Testing Services. “Knowledge Q&A on Applying for MA Certification Mark.” Available at: https://www.labsts.com/en/introduction-of-ma-certification [3] Labsts Testing Services. “What Kind of Certification Does MA Certification Belong To.” Available at: https://www.labsts.com/en/explosion-proof-information/20210225-55878.html [4] ScienceDirect. “Reform and Development of Coal Mine Safety in China: An Analysis from Government Supervision, Technical Equipment, and Miner Education.” Available at: https://www.sciencedirect.com/science/article/abs/pii/S0301420722002252 [5] Yiteng Cable Technology. “MYP Mine Rubber Cable Specifications and Applications.” Available at: https://cablesyt.com/product/myp-mine-rubber-cable/ [6] Shanghai QIFAN Cable. “Power Cable Soft Sheathed MYP Mining Cable Technical Parameters.” Available at: https://shqifan.en.made-in-china.com/product/xJrpdYRUBnpM/China-Power-Cable-Soft-Sheathed-Myp-Mining-Cable.html [7] Shanghai Shenghua Cable Group. “MYP Low Voltage Cable Colliery – Rubber Sheath Cable Specifications.” Available at: https://www.shanpowercable.com/quality-10043489-myp-low-voltage-cable-colliery-rubber-sheath-cable-mining-cable [8] Tianhuan Cable Group. “MY Type Underground Mine Cable – MT/T 818.5 Standard Compliance.” Available at: https://thcable.en.made-in-china.com/product/ZrlYhHDUgpkI/China-My-Type-Underground-Mine-Cable-Mobile-Machinery-Power-Supply-Flame-Retardant-Anti-Aging-Compliant-with-Mt-T-818-5.html [9] Zhengzhou JYC Wire and Cable. “Coal Mining Machine Rubber Soft Cable Standards.” Available at: https://www.vwcable.com/coal-mining-machine-rubber-soft-cable-uc-ucp-ucp-my-myp-mcp/ [10] Code of China. “MT 818.1-2009 Cables for Coal Mine – Part 1: General Rules for Movable Flexible Cables.” Available at: https://codeofchina.com/standard/MT818.1-2009.html [11] Code of China. “MT 818.11-2009 Cables for Coal Mine – Part 11: General Rules for Fixed Formation Power Cables.” Available at: https://www.codeofchina.com/standard/MT818.11-2009.html [12] Tratos Group. “MT818 Series – Chinese Standard for Mining Cables.” Available at: https://tratosgroup.com/products/standards/others/mt818-series/ [13] Made-in-China. “GB/T 12972.2 Certified MYP Cable – Coal Mine Safety Approved.” Available at: https://www.made-in-china.com/video-channel/linkab_VTfYhabUVprs_GB-T-12972-2-Certified-Myp-Cable-Coal-Mine-Safety-Approved-with-Copper-Shield.html [14] Code of China. “MT 818.8-2009 Cables for Coal Mine – Part 8: Drill Cable Standards.” Available at: https://codeofchina.com/standard/MT818.8-2009.html [15] Tianhuan Cable Group. “300/500V MYQ Mine Mobile Lightweight Rubber Cable – MT818.9 Standard.” Available at: https://thcable.en.made-in-china.com/product/pJiUOjdrrwRS/China-300-500V-Myq-Mine-Mobile-Lightweight-Rubber-Cable-Compliant-with-Mt818-9-Standard.html [16] KMCABLE. “Chinese Rubber Cable Guide – Mine-Safe Type Specifications.” Available at: https://kmcablegroup.com/news/chinese-rubber-cable-guide/ [17] Hebei Huatong Cables. “0.38/0.66kV MY MYP MP MCP Flexible Copper Rubber Mining Cable.” Available at: https://huatongcables.en.made-in-china.com/product/sSomFJHvAIpi/China-0-38-0-66kv-0-66-1-1kv-My-Myp-MP-Mcp-Flexible-Copper-Rubber-Sheathed-Mining-Cable-for-Coal-Mining.html [18] Jiangsu Shangshang Cable Group. “Movable Flexible Cables Type MY & MYP Technical Documentation.” Available at: https://www.shangshanggroup.net/movable-flexible-cables-for-coal-mine-16249362868465289.html [19] Arnold Cable. “16mm Mining Cable Underground Electric Mining Cable Standards.” Available at: https://www.arnoldcable.com/16mm-mining-cable-underground-electric-mining-cable/ [20] HDC Cables. “Flexible Rubber Sheathed Soft Cable for Coal Mining Machine.” Available at: https://hdc-cables.com/mining-cable/ [21] HOUCABLE. “Medium Voltage MYP MYPTJ MYPT EPR Insulation Coal Mining Cable.” Available at: https://www.houcable.com/medium-voltage-myp-myptj-mypt-epr-insulaton-and-cpe-sheath-coal-mining-cable/ [22] MSHA. “Approval and Certification Center – Mine Safety Equipment Standards.” Available at: https://www.msha.gov/about/program-areas-offices/technical-support/technical-support/approval-and-certification-center [23] MSHA. “MSHA Qualifications and Certifications Information System.” Available at: https://www.msha.gov/msha-qualifications-and-certifications-information [24] SME. “Certified Mine Safety Professional (CMSP) Program Requirements.” Available at: https://www.smenet.org/Professional-Development/Certified-Mine-Safety-Professional-(CMSP)-ProgramContact Anhui Feichun Special Cable Co., Ltd 联系安徽飞纯特种电缆有限公司
For MA certification consulting, MYP cable specifications, or technical support regarding coal mine cable applications, please contact our engineering and compliance team.
如需MA认证咨询、MYP电缆规格或煤矿电缆应用技术支持，请联系我们的工程和合规团队。
![IEC 60228 Class 5 conductors are acceptable and appropriate for Australian Type 441 mining cables because AS/NZS 1125 (the Australian/New Zealand conductor standard) is harmonized with IEC 60228 and explicitly recognizes its conductor classifications. Type 441 cables specify flexible stranded tinned annealed copper conductors complying with AS/NZS 1125, and since AS/NZS 1125 is based on IEC 60228, Class 5 conductors meet the flexibility and electrical performance requirements for these demanding mining applications. This compatibility reflects the deliberate harmonization between international and regional standards to facilitate global cable trade while maintaining stringent safety requirements.[1][2][3] 是的，IEC 60228 Class 5导体适用于澳大利亚Type 441矿用电缆，因为AS/NZS 1125（澳大利亚/新西兰导体标准）与IEC 60228协调一致，并明确认可其导体分类。Type 441电缆规定使用符合AS/NZS 1125的柔性绞合镀锡退火铜导体，由于AS/NZS 1125基于IEC 60228，Class 5导体满足这些苛刻矿用应用的柔软性和电气性能要求。这种兼容性反映了国际标准与区域标准之间的刻意协调，以促进全球电缆贸易，同时保持严格的安全要求。](https://feichuncables.com/blog/wp-content/uploads/image-655-400x225.avif "IEC vs. AS/NZS: IEC 60228 Class 5 Conductors for Type 441 Cables 3")
