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AS/NZS 1972 standard

13 Min Read
In underground coal mining across Australia and New Zealand, selecting between AS/NZS 1802 and AS/NZS 1972 is not a matter of personal preference or cost optimization—it is a matter of electrical safety compliance and regulatory requirement. The decision tree, however, is surprisingly straightforward once you understand the single fundamental principle that separates these two standards: whether your equipment moves while energized. 在澳大利亚和新西兰的地下煤矿电气设计中，在AS/NZS 1802和AS/NZS 1972之间选择不是个人偏好或成本优化的问题——这是电气安全合规性和监管要求的问题。然而，一旦您理解分离这两个标准的单一基本原则，决策树就会变得出奇地直接：您的设备在通电时是否移动。
Technical Department
on06/03/2026

AS/NZS 1802 vs AS/NZS 1972: Which Australian Standard Applies to Your Underground Mining Equipment?

In underground coal mining across Australia and New Zealand, selecting between AS/NZS 1802 and AS/NZS 1972 is not a matter of personal preference or cost optimization—it is a matter of electrical safety compliance and regulatory requirement. The decision tree, however, is surprisingly straightforward once you understand the single fundamental principle that separates these two standards: whether your equipment moves while energized. 在澳大利亚和新西兰的地下煤矿电气设计中，在AS/NZS 1802和AS/NZS 1972之间选择不是个人偏好或成本优化的问题——这是电气安全合规性和监管要求的问题。然而，一旦您理解分离这两个标准的单一基本原则，决策树就会变得出奇地直接：您的设备在通电时是否移动。
9 Min Read
Type 7S cables are specifically engineered for mining applications where equipment must operate in wet, chemically hostile, and mechanically demanding underground environments. The designation "7S" indicates a cable designed for high mechanical stress combined with submersion protection—the perfect specification for permanent dewatering pump installations in deep mine shafts. Type 7S电缆专门为必须在潮湿、化学腐蚀性和机械要求苛刻的地下环境中运行的采矿应用而设计。术语"7S"表示一种为高机械应力结合浸没保护而设计的电缆——是深矿井永久降水泵安装的完美规范。
Technical Department
on06/03/2026

Dewatering Pumps: Is Type 7S 1.1kV 3x50mm² Suitable for Permanent Submerged Connections?

Type 7S cables are specifically engineered for mining applications where equipment must operate in wet, chemically hostile, and mechanically demanding underground environments. The designation “7S” indicates a cable designed for high mechanical stress combined with submersion protection—the perfect specification for permanent dewatering pump installations in deep mine shafts. Type 7S电缆专门为必须在潮湿、化学腐蚀性和机械要求苛刻的地下环境中运行的采矿应用而设计。术语”7S”表示一种为高机械应力结合浸没保护而设计的电缆——是深矿井永久降水泵安装的完美规范。
26 Min Read
The (N)SSHÖU 3x50+3x25/3 1.1/1.1kV trailing cable represents far more than a simple voltage specification change from the standard European 0.6/1kV industrial flexible cable. When you examine New Zealand's mining, quarrying, and port operations, the environment is fundamentally different from European industrial applications. The country's open-cast mining sites experience extreme weather variations, high UV radiation, exposure to harsh corrosive mining chemicals, and require continuous mechanical durability in equipment that cannot afford operational downtime. New Zealand's electrical safety standards reflect this demanding reality through three core requirements. First, the nation's IT earthing system (isolated or high-resistance grounding) demands insulation rated for phase-to-earth voltage equal to phase-to-phase voltage (Uo = U), which necessitates the 1.1/1.1kV rating instead of 0.6/1kV. Second, the split symmetrical earth design with three individual 25mm² earth conductors placed symmetrically around the three 50mm² phase conductors provides unprecedented protection against unbalanced fault conditions that could otherwise result in lethal contact voltage hazards for equipment operators. Third, New Zealand's mining operations often involve long-distance power transmission—sometimes exceeding 800 meters from the surface substation to the underground working face—which creates severe voltage drop problems that cannot be adequately addressed by 0.6/1kV systems but are managed effectively by the higher 1.1/1.1kV rating. The (N)SSHÖU 3x50+3x25/3 1.1/1.1kV cable delivers a total weight of approximately 3550 kilograms per kilometer, carries a copper content of 1680 kg/km, maintains an ampacity of 182 amperes in free air at 30°C, features an outer diameter in the range of 42.0 to 47.0 millimeters, and is constructed from EPR rubber insulation with a heavy-duty CPE outer sheath specifically formulated to resist the abrasion, tearing, oil penetration, and ultraviolet degradation characteristic of New Zealand's unforgiving mining and quarry environments.
Technical Department
on05/03/2026

Voltage Upgrade: Why Replace Standard 0.6/1kV with (N)SSHÖU 3×50+3×25/3 1.1/1.1kV in New Zealand?

The (N)SSHÖU 3×50+3×25/3 1.1/1.1kV trailing cable represents far more than a simple voltage specification change from the standard European 0.6/1kV industrial flexible cable. When you examine New Zealand’s mining, quarrying, and port operations, the environment is fundamentally different from European industrial applications. The country’s open-cast mining sites experience extreme weather variations, high UV radiation, exposure to harsh corrosive mining chemicals, and require continuous mechanical durability in equipment that cannot afford operational downtime. New Zealand’s electrical safety standards reflect this demanding reality through three core requirements. First, the nation’s IT earthing system (isolated or high-resistance grounding) demands insulation rated for phase-to-earth voltage equal to phase-to-phase voltage (Uo = U), which necessitates the 1.1/1.1kV rating instead of 0.6/1kV. Second, the split symmetrical earth design with three individual 25mm² earth conductors placed symmetrically around the three 50mm² phase conductors provides unprecedented protection against unbalanced fault conditions that could otherwise result in lethal contact voltage hazards for equipment operators. Third, New Zealand’s mining operations often involve long-distance power transmission—sometimes exceeding 800 meters from the surface substation to the underground working face—which creates severe voltage drop problems that cannot be adequately addressed by 0.6/1kV systems but are managed effectively by the higher 1.1/1.1kV rating. The (N)SSHÖU 3×50+3×25/3 1.1/1.1kV cable delivers a total weight of approximately 3550 kilograms per kilometer, carries a copper content of 1680 kg/km, maintains an ampacity of 182 amperes in free air at 30°C, features an outer diameter in the range of 42.0 to 47.0 millimeters, and is constructed from EPR rubber insulation with a heavy-duty CPE outer sheath specifically formulated to resist the abrasion, tearing, oil penetration, and ultraviolet degradation characteristic of New Zealand’s unforgiving mining and quarry environments.