China 150 Sq Mm Cable Gland Size Manufacturer & Suppliers

The cable gland size cannot be determined by the conductor cross-section alone (150 mm²). It depends on whether the cable is single-core or multi-core, and unarmoured or armoured (SWA/AWA). Typically:
• 1-Core 150 mm² Unarmoured: Overall OD is ~21.5–25.2 mm → Requires M32 or M40 gland.
• 1-Core 150 mm² AWA Armoured: Overall OD is ~26.4–31.8 mm → Requires M40 gland.
• 3-Core 150 mm² Unarmoured: Overall OD is ~42.0–48.5 mm → Requires M50 or M63 gland.
• 3-Core / 4-Core 150 mm² SWA: Overall OD is ~49.2–66.2 mm → Requires M63 or M75 industrial armoured gland (CW / E1W type). Always verify the cable manufacturer’s actual outer sheath OD against the gland’s minimum and maximum clamping range.

Single-core AC power cables carry high alternating currents (often exceeding 350–500 Amperes for 150 mm²). If steel wire armour (SWA, a ferromagnetic material) were used, the alternating magnetic field would induce severe eddy currents and magnetic hysteresis losses within the steel, causing destructive overheating and thermal derating. Therefore, Aluminium Wire Armour (AWA), which is non-magnetic, is mandatory for single-core cables. The corresponding cable gland must use brass or aluminium clamping cones designed for non-magnetic armour termination to preserve earth continuity without eddy current heating.

Both are BS 6121 / IEC 62444 designs for steel wire armoured (SWA) cables, but their sealing configurations differ:
• CW Type Glands: Feature a single outer compression seal that grips and waterproofs the cable's external sheath, while providing mechanical armour retention and earth continuity. Suitable for indoor or general industrial weatherproof outdoor enclosures.
• E1W Type Glands: Feature a double seal mechanism. An inner seal compresses directly onto the cable's inner bedding layer (preventing gas or moisture migration from within the cable core), while an outer seal protects the armour interface from external environmental moisture. E1W glands are mandatory in heavy offshore, marine, and hazardous classified environments.

Achieving a verified IP68 rating (e.g., 5 bar immersion for 72 hours) on large cables requires four critical factors:
1. Cable Circularity: The heavy outer sheath must be circular and free of deep longitudinal grooves or oval deformation.
2. Specified Tightening Torque: The cap nut must be tightened with a calibrated torque wrench to the exact manufacturer rating (e.g., 65 Nm for M50, 80 Nm for M63). Under-tightening allows water creep; over-tightening crushes the elastomer and shears the cable sheath.
3. Enclosure Interface Sealing: Use a high-grade EPDM, NBR, or PTFE sealing washer at the clearance hole interface between the gland body and enclosure wall.
4. Thread Engagement: Ensure a minimum of 5 full threads of engagement in tapped entries or use a matching serrated locknut.

Yes. As a direct manufacturer established in 2006, HOONSUN operates its own in-house CNC machining and electroplating facilities. We routinely fabricate extended thread lengths (up to 25 mm–35 mm) to pass through thick cast-iron motor terminal boxes or insulated sandwich enclosure panels. For coastal and marine installations, we supply heavy nickel-plating (8–12 μm) or complete AISI 316L stainless steel cable glands tested to exceed 1,000 hours of continuous ASTM B117 neutral salt spray without pitting.