Standard cable glands only seal against the outer jacket of a non-armoured cable. An SWA cable gland serves a dual engineering purpose: it secures the heavy physical steel wire armour (SWA) and provides a continuous earth path, all while maintaining ingress protection at the enclosure entry.
A standard non-armoured gland relies solely on an elastomeric rubber seal compressed against the outer jacket. When subjected to axial pull, vibration, or thermal expansion, standard seals can slip, exposing the internal conductors to strain.
Un dispositivo dedicato gland for swa cable integrates an internal two-part mechanical grip—typically a cone and an armour clamping ring. When tightened, this mechanism locks the steel wires permanently in place.
| Caratteristica | Standard Unarmoured Gland | SWA Armoured Cable Gland |
|---|---|---|
| Primary Retention | Rubber compression seal | Two-part metal armour clamping ring & cone |
| Load Bearing Target | Outer PVC / LSZH sheath | High-tensile steel wire armour (SWA) |
| Earth Path Capability | Nessuno | Full metal-to-metal earth continuity |
| Mechanical Pull-out Force | Bassa o moderata | High mechanical load resistance |
In steel wire armoured cable systems, the steel wires do not just shield against physical impact; they also function as a protective circuit conductor (CPC). If an insulation fault occurs, high fault current travels along the armour wires back to the source to trip upstream protective devices.
Una qualità brass armoured cable gland ensures uninterrupted earth continuity across this connection:
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An cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits
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| Tipo di Morsetto | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | Livello di Protezione | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
|---|---|---|---|
| BW | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
| CW | Outer sheath compression + armour clamp | IP66 Weatherproof | Outdoor plant equipment, junction boxes, and standard industrial feeds. |
| E1W | Inner bedding seal + outer sheath seal + armour clamp | IP66 / IP68 Submersible | Direct burial, wet cable pits, marine docks, and high-vibration plants. |
For outdoor or challenging settings, pairing a brass armoured cable gland with a complete gland kit—including the matching locknut, earth tag, and protective shroud—ensures the assembly maintains structural rigidity and mechanical earth protection for the life of the installation. Our brass and nickel-plated armoured glands ship as complete kits with locknut, earth tag and shroud matched to the body size.
Sizing an cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits solely by conductor cross-section (such as 4-core 16 mm²) leads to improper fits on site. Different cable manufacturers use varying insulation thicknesses and filler compounds, meaning the physical dimensions of SWA cables differ even within the same conductor rating. To guarantee secure mechanical retention, earth continuity, and environmental ingress protection, we always size glands against exact physical cable measurements using a calibrated vernier caliper.
To select the right gland for SWA cable, you must record three critical dimensions:
Un modello standard gland size chart matches your measured dimensions against the mechanical tolerances of the gland body and clamping components.
| Entry Thread | Product Number | Incoming Range (mm) | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | Lunghezza del filetto (mm) | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 12 | 15 | 24 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 12 | 15 | 24 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 16 | 15 | 30 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 20 | 17 | 38 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 28 | 17 | 45 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 35 | 20 | 55 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 45 | 20 | 68 |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 55 | 22 | 82 |
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Selecting the right metal for an cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits ensures mechanical integrity and stops galvanic corrosion before it compromises an electrical installation. Four materials cover almost every specification, and the choice follows the environment rather than the price.
Aluminium is unsuitable for standard SWA cable. Placing aluminium directly against steel wire armour in the presence of ambient moisture creates a strong galvanic cell. The aluminium acts as the sacrificial anode, rapidly corroding away at the contact interface.
This electrolytic reaction destroys the threads, loosens the clamping cone, and breaks earth fault continuity. Aluminium glands must be reserved exclusively for single-core cables armoured with aluminium wire armour (AWA). For all standard steel wire runs, stick strictly to brass, nickel-plated brass, or stainless steel swa gland assemblies.
A complete armoured cable gland installation relies on the accessories that secure, earth, and protect the entry point. The locknut anchors the gland body to the enclosure wall, the earth tag provides a direct fault current path, and the shroud shields the mechanical assembly from moisture and environmental contaminants. Omitting any of these components undermines the safety and durability of the installation.
When installing an SWA gland, the earth tag must sit flush against the enclosure wall or gland plate, secured firmly by the locknut on the inside or sandwiched on the entry side depending on the enclosure design:
Protective shrouds act as the primary barrier against the elements, preventing moisture ingress around the gland threads and armour clamping components.
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| Standard | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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Send the six fields above and we will come back with a sized gland, the matching kit, and the thread form your enclosure needs — view the BDM-VII armoured range or send the specifications directly.
Yes, you can use a CW gland indoors without issue. While standard BW glands handle dry indoor spaces, a CW gland includes an outer elastomeric seal that locks out dust and water ingress. If your indoor run sits in a damp basement, a washdown area, or an unconditioned plant room, stepping up to a CW gland adds essential ingress protection while maintaining solid mechanical retention on the steel wire armour.
The gland must clamp 100% of the steel wire armour strands. When seating the cable onto the cone, spread every single wire evenly across the tapered shoulder before securing the armour clamping ring. Trimming back wires or leaving gaps causes two major failure points: it weakens mechanical pull-out resistance and compromises the low-resistance earth continuity path required for fault current clearance.
An earth tag is necessary on almost every standard installation unless you are threading directly into a substantial, unpainted metallic enclosure verified for earth fault currents. On painted enclosures, non-metallic enclosures, or clearance hole entries, an earth tag clamped tightly under the locknut guarantees a continuous, dedicated bond from the steel wire armour directly to the protective earth bar.
Informazioni su Wandu — Zhejiang Wandu Plastic Co., Ltd. has produced nylon cable ties in Yueqing, Zhejiang, China since 2011. Our ISO 9001 certified factory runs 10 high-speed injection moulding machines and 8 professional cable tie test benches, covering nylon cable ties, stainless steel cable ties, cable clips, cable glands and spiral wrap. Products are CE and RoHS compliant and ship to buyers in 50+ countries. Every technical question below is answered by our own engineering team.
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