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AS/NZS 1972 vs AS/NZS 1802

9 Min Read
When a heavy high-voltage cable is suspended vertically in a deep mine shaft (depths ranging from 500 to 2,000+ meters), it experiences mechanical stresses fundamentally different from horizontal installation. The single most critical issue is torsional stress from the cable's own weight acting upon the helical armor structure. 当沉重的高压电缆垂直悬挂在深矿井中(深度范围从500到2,000多米)时，它经历的机械应力与水平安装根本不同。最关键的单一问题是电缆自身重量作用在螺旋铠装结构上产生的扭转应力。 The Single-Wire Armor Problem: A standard SWA (single-wire armour) cable features a helical layer of galvanized steel wires wound around the insulation in one direction (typically right-hand helix). When the cable hangs vertically and experiences the entire weight of its length below it, the helical geometry creates a mechanical disadvantage. The steel wire winding naturally wants to "unwind" or rotate under the extreme tensile load, generating enormous torsional stress throughout the cable.
Technical Department
on06/03/2026

Double Wire Armour (DWA): Why Type 8 11kV Cables Require Dual Armor for Vertical Mine Shaft Suspension

When a heavy high-voltage cable is suspended vertically in a deep mine shaft (depths ranging from 500 to 2,000+ meters), it experiences mechanical stresses fundamentally different from horizontal installation. The single most critical issue is torsional stress from the cable’s own weight acting upon the helical armor structure. 当沉重的高压电缆垂直悬挂在深矿井中(深度范围从500到2,000多米)时，它经历的机械应力与水平安装根本不同。最关键的单一问题是电缆自身重量作用在螺旋铠装结构上产生的扭转应力。 The Single-Wire Armor Problem: A standard SWA (single-wire armour) cable features a helical layer of galvanized steel wires wound around the insulation in one direction (typically right-hand helix). When the cable hangs vertically and experiences the entire weight of its length below it, the helical geometry creates a mechanical disadvantage. The steel wire winding naturally wants to “unwind” or rotate under the extreme tensile load, generating enormous torsional stress throughout the cable.
13 Min Read
The nominal outer diameter (OD) of an AS/NZS 1972 Type 2S 11kV 3x185mm² feeder cable is 76.0 to 80.0 millimeters (3.0 to 3.15 inches). The typical design center for Feichun's Type 2S 3x185mm² product is approximately 78.6 mm. This measurement is taken across the outermost surface of the flame-retardant PVC sheath, which forms the final protective layer after the galvanized steel wire armour (SWA) and inner insulation geometry. 澳标 AS/NZS 1972 Type 2S 11kV 3x185mm² 馈电电缆的标称外径为 76.0 至 80.0 毫米（3.0 至 3.15 英寸）。 Feichun Type 2S 3x185mm² 产品的典型设计中心约为 78.6 mm。该测量是在钢丝铠装 (SWA) 和内层绝缘几何结构之后，在阻燃 PVC 外护套的最外表面进行的。 This 76–80 mm range is not arbitrary—it represents the accumulated thicknesses of multiple cable components layered concentrically around the three power conductors. To understand where this dimension comes from, an electrical engineer planning a mine installation must understand the contribution of each layer.
Technical Department
on06/03/2026

Outer Diameter Specs: What is the Nominal OD for AS/NZS 1972 Type 2S 11kV 3x185mm² Feeder Cable?

The nominal outer diameter (OD) of an AS/NZS 1972 Type 2S 11kV 3x185mm² feeder cable is 76.0 to 80.0 millimeters (3.0 to 3.15 inches). The typical design center for Feichun’s Type 2S 3x185mm² product is approximately 78.6 mm. This measurement is taken across the outermost surface of the flame-retardant PVC sheath, which forms the final protective layer after the galvanized steel wire armour (SWA) and inner insulation geometry. 澳标 AS/NZS 1972 Type 2S 11kV 3x185mm² 馈电电缆的标称外径为 76.0 至 80.0 毫米（3.0 至 3.15 英寸）。 Feichun Type 2S 3x185mm² 产品的典型设计中心约为 78.6 mm。该测量是在钢丝铠装 (SWA) 和内层绝缘几何结构之后，在阻燃 PVC 外护套的最外表面进行的。 This 76–80 mm range is not arbitrary—it represents the accumulated thicknesses of multiple cable components layered concentrically around the three power conductors. To understand where this dimension comes from, an electrical engineer planning a mine installation must understand the contribution of each layer.
10 Min Read
The Single Most Important Cable Design Decision in Underground Coal Mining: Whether the cable employs collective screening (Type 2) or individual phase screening (Type 2S). This single engineering choice directly determines whether a mechanical cable failure will result in a phase-to-earth fault (detected and stopped in milliseconds) or a phase-to-phase fault with thousands of amperes of arc current (igniting methane explosions).
Technical Department
on06/03/2026

Type 2 vs Type 2S: Why the “S” (Individual Screen) is Mandatory for 11kV Underground Coal Mines

The Single Most Important Cable Design Decision in Underground Coal Mining: Whether the cable employs collective screening (Type 2) or individual phase screening (Type 2S). This single engineering choice directly determines whether a mechanical cable failure will result in a phase-to-earth fault (detected and stopped in milliseconds) or a phase-to-phase fault with thousands of amperes of arc current (igniting methane explosions).