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PVC sheathed mining cable

19 Min Read
For a Type 3S 11kV feeder cable with 82–88 mm outer diameter (typically a 3x95mm² to 3x240mm² conductor), the appropriate Ex d cable gland must be sized to accommodate the cable's full outer diameter while maintaining the flange-threaded sealing design required by ATEX EN 60079-1 for Zone 1 explosive atmospheres. A typical selection for a 3x95mm² Type 3S cable would be an M100 or M105 flange-threaded gland rated for ATEX II 2G Ex d IIB T4, with a compressive sealing ring (typically 2 mm thick polyurethane or equivalent elastomer) that creates a pressure-tight barrier against explosive gas ingress, and a separate earthing screw or braided conductor that bonds the cable's steel wire armor directly to the enclosure's earth continuity. This is not simply a matter of finding any cable gland that fits the cable diameter—it is a critical safety component that must be certified, specified, and installed with precision.
Technical Department
on06/03/2026

Ex d Gland Matching: Terminating Type 3S 11kV SWA Armor in Hazardous Zone 1

For a Type 3S 11kV feeder cable with 82–88 mm outer diameter (typically a 3x95mm² to 3x240mm² conductor), the appropriate Ex d cable gland must be sized to accommodate the cable’s full outer diameter while maintaining the flange-threaded sealing design required by ATEX EN 60079-1 for Zone 1 explosive atmospheres. A typical selection for a 3x95mm² Type 3S cable would be an M100 or M105 flange-threaded gland rated for ATEX II 2G Ex d IIB T4, with a compressive sealing ring (typically 2 mm thick polyurethane or equivalent elastomer) that creates a pressure-tight barrier against explosive gas ingress, and a separate earthing screw or braided conductor that bonds the cable’s steel wire armor directly to the enclosure’s earth continuity. This is not simply a matter of finding any cable gland that fits the cable diameter—it is a critical safety component that must be certified, specified, and installed with precision.
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).