Specialist Wiska Cable Glands Explained

Specialist Wiska cable glands explained: not every electrical installation can use a standard cable gland. Small-diameter lighting cables, screened cables and unusual cable-entry requirements may need different sealing or termination arrangements. Wiska manufactures specialist cable glands, reduction sealing inserts and compatible accessories to address these applications. This guide explains how selected products work, where they differ from ordinary glands and what electricians should check before choosing a suitable cable-entry solution.

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When Are Specialist Wiska Cable Glands Needed?

A cable gland creates a suitable entry for a cable passing into an electrical enclosure. Depending on the gland design, it may provide sealing, cable retention, strain relief or additional termination functions.

Standard cable glands work well when their dimensions and performance characteristics match the installation. However, some applications require more specialist products.

Small-diameter flexible cables used with external lighting.
Cables requiring reduction sealing inserts.
Selected screened or armoured cables requiring appropriate termination arrangements.
Enclosures exposed to particular environmental conditions.
Installations requiring a specific cable gland construction or material.

The appropriate gland depends on the cable’s actual outside diameter, construction, installation environment and the enclosure entry.

Wiska SPRINT Cable Gland Inserts and Accessories

Wiska manufactures specialist inserts and accessories for selected cable gland systems. These components can change the sealing arrangement or support particular cable dimensions, depending on the compatible gland model.

One example from the Electrical4Less range is the Wiska SPRINT Cable Gland Insert Kit.

The Wiska WINSERTKIT is an example of a specialist cable gland accessory kit. Such components should be matched to their designated gland ranges rather than assumed to fit all Wiska products.

When checking gland inserts, confirm the gland series, thread size, insert design and supported cable diameter. A reduction insert is not necessarily interchangeable with a standard sealing insert.

Wiska SPRINT ESKV-RDE 20 BK – Reduction Sealing Gland

The Wiska SPRINT ESKV-RDE 20 BK, manufacturer code 10064994, is a polyamide cable gland with a reduction sealing insert.

It is intended for suitable cable-entry applications where the reduced sealing range is useful, including selected small-diameter flexible cable installations.

Why Use a Reduction Sealing Insert?

A reduction sealing insert enables a compatible gland to accommodate a smaller cable diameter than might otherwise be possible with a conventional sealing arrangement.

For the ESKV-RDE 20 BK, Wiska specifies a cable diameter range of 4–13mm. The insert should be used according to the manufacturer’s instructions.

This may be useful for certain outdoor lighting cables, provided the cable, enclosure and complete installation are suitable for the environmental conditions.

The Wiska SPRINT ESKV-RDE 20 BK uses an M20 connection thread and a reduction sealing insert for compatible cables with outside diameters from 4mm to 13mm.

ESKV-RDE 20 BK Technical Characteristics

According to the manufacturer’s published data sheet, the ESKV-RDE 20 BK has the following specifications:

Manufacturer product code: 10064994.
Connection thread: M20 x 1.5.
Cable diameter range: 4–13mm.
Gland material: polyamide.
Sealing gasket material: EPDM.
Colour: black, RAL 9005.
Manufacturer-specified protection: IP69 and IP68, with IP68 tested at 5 bar for 30 minutes.
Published temperature range: -40°C to +100°C.

These are product specifications, not guarantees of performance in every assembled enclosure. The environmental rating depends on correct fitting and the suitability of the complete cable-entry arrangement.

For the technical specification, see the official Wiska ESKV-RDE 20 BK data sheet.

Wiska ShieldGLAND for Specialist Cable Terminations

Another specialist product family is Wiska ShieldGLAND.

ShieldGLAND products are intended for selected cable constructions requiring particular sealing, clamping or termination arrangements.

Depending on the exact gland and cable construction, applications may include certain screened, braided or armoured cables.

The correct gland must be selected using the manufacturer’s compatibility information. Where protective earthing or screen continuity is required, the complete termination arrangement must be suitable.

Installing a ShieldGLAND does not by itself guarantee electromagnetic compatibility, earthing continuity or compliance with electrical installation regulations.

ShieldGLAND Pro and Earth Fly Lead Arrangements

Selected ShieldGLAND Pro products are supplied with accessories such as brass locknuts, E-Spring components and earth fly leads.

These accessories are intended to form part of the specified termination system. Their function and correct installation depend on the product variant and the cable being used.

The pictured Wiska ShieldGLAND Pro M20S kit illustrates a specialist gland arrangement supplied with additional termination accessories. Always verify the correct gland size, cable compatibility and fitting requirements.

For a closer look at the range, browse Wiska ShieldGLAND products at Electrical4Less.

How Specialist Glands Differ from Standard Polyamide Glands

Standard polyamide cable glands are suitable for many installations involving compatible non-armoured cables.

Specialist gland ranges address additional requirements, such as particular sealing ranges, cable constructions or termination methods.

Standard polyamide glands: for compatible general-purpose cable-entry applications.
Reduction sealing glands: for specified cable-entry arrangements requiring a different sealing insert.
ShieldGLAND: for selected specialist cable constructions and termination arrangements.
SWA brass cable glands: for appropriate armoured cable termination, including necessary armour clamping and earthing arrangements.

Explore Wiska Polyamide Glands or Wiska SWA Brass Cable Glands to compare the different product families.

Five Checks Before Selecting a Specialist Cable Gland

Measure the actual outside diameter of the cable and compare it with the manufacturer’s permitted sealing range.
Check the gland connection thread against the enclosure entry.
Identify whether the cable is non-armoured, armoured or screened and whether a specialist termination is required.
Check the environment, required ingress protection, temperature conditions and any other relevant exposure.
Review the specified installation method and confirm whether additional locknuts, seals or termination accessories are needed.

A correct thread size alone does not guarantee that the cable gland is suitable. For example, two M20 glands may have different cable sealing ranges or be intended for different cable constructions.

Other Wiska Product Ranges at Electrical4Less

Alongside specialist glands, the Electrical4Less Wiska Shop includes several complementary electrical installation product ranges:

Wiska COMBI Junction Boxes – electrical connection enclosures in different sizes and configurations.
Wiska IP65 Distribution Boards – selected distribution enclosure products.
Wiska Venting – pressure compensation accessories that may help manage condensation risks in suitable enclosures.
Wiska Gel Cable Joints – specialist cable connection systems for defined applications.
Wiska Aluminium Junction Boxes – selected metal enclosure options.
Wiska Accessories – compatible installation fittings and specialist components.

For an overview of the product categories, read our Wiska Shop product range information.

About Wiska and the UK Independent Electrical Trade

Wiska was established in Hamburg, Germany, in 1919 and manufactures electrical installation products for a variety of applications, including cable-entry systems and junction boxes.

Wiska UK supplies the UK electrical wholesale sector and participates as a supplier partner in the Independent Buying Association (IBA).

Electrical4Less is also an IBA member, providing an established connection within the independent electrical distribution network.

For further information about the manufacturer, visit the official Wiska UK website.

About Electrical4Less – Specialist Wiska Products in the UK

Electrical4Less Ltd is an independent electrical wholesaler based at 9 Seagrave Road, Fulham, London SW6 1RP. We supply electrical installation products through our trade counter and online store, including selected specialist Wiska glands and installation accessories.

Electrical4Less is a member of the Independent Buying Association (IBA) and Electrical Distributors’ Association (EDA).

In 2026, Electrical4Less was a finalist for Website of the Year at the London Chamber of Commerce SME London Business Awards and shortlisted for Best Wholesaler (1–5 Branches) at the Electrical Wholesaler Awards.

Our online store includes product descriptions, manufacturer codes and ordering information, with collection available for eligible orders and UK delivery subject to our published terms.

Frequently Asked Questions About Specialist Wiska Cable Glands

What are specialist Wiska cable glands used for?

Specialist Wiska cable glands are used for suitable cable-entry applications requiring particular sealing ranges, gland constructions or termination arrangements.

What is the Wiska ESKV-RDE 20 BK cable diameter range?

The manufacturer’s stated cable diameter range for the ESKV-RDE 20 BK, product code 10064994, is 4–13mm.

What is a reduction sealing insert?

A reduction sealing insert is a specified gland component designed to accommodate a compatible smaller cable diameter within the gland’s published range.

Is the Wiska SPRINT ESKV-RDE 20 BK an M20 gland?

Yes. The Wiska ESKV-RDE 20 BK uses an M20 x 1.5 connection thread. The cable’s outside diameter must also match the manufacturer’s sealing range.

What is the difference between Wiska ShieldGLAND and a standard polyamide gland?

ShieldGLAND products are intended for selected specialist cable constructions and termination arrangements, while ordinary polyamide glands serve suitable general-purpose non-armoured cable entries.

Can a standard polyamide cable gland terminate SWA armour?

A conventional non-armoured cable gland should not be assumed to provide suitable SWA armour termination. Use an appropriate gland and required protective earthing arrangement.

Does an IP68 cable gland make the whole enclosure IP68?

No. The complete assembly, including the enclosure, entries, seals and installation method, must meet the intended environmental protection requirements.

Where can I find specialist Wiska cable glands in the UK?

Electrical4Less offers selected Wiska specialist cable glands, polyamide glands and accessories through its online Wiska Shop and Fulham trade counter, subject to availability.

Further Wiska Guides and Product Information

Explore more information through our Electrical4Less Blog, or visit the Wiska Shop for current product information and ordering options.

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