Description

Dowells Brass Cable Gland 75mm (3”) – Single/Double Compression

The Dowells Brass Cable Gland 75mm (3”) – Single/Double Compression is intended for large industrial cable-entry applications where the gland must be selected to match the cable’s actual dimensions and the requirements of the electrical enclosure or equipment.

For a product of this size, the nominal gland size should not be treated as the cable’s actual outside diameter. Dowells’ selection chart specifies cable-diameter ranges for individual gland codes. For example, DGP10016 covers 68.1–74.0 mm, while DGP10017 covers 74.1–80.5 mm.

Therefore, if the cable measures approximately 75mm OD, it falls into the DGP10017 range, not DGP10016, based on the published chart. This is exactly why actual cable OD should be checked before placing a purchase order.

For a broader selection process covering cable OD, construction, armour and gland configuration, see our Cable Gland Supplier India: 15 Expert Tips to Choose the Right Cable Gland.

Dowells 75mm Single Compression Cable Gland

Dowells’ catalogue identifies 75mm (3″) within its Single Compression range, with DGP10016 associated with the 75mm nominal size in the product listing. However, the separate selection chart assigns DGP10016 to 68.1–74.0mm cable diameter and DGP10017 to 74.1–80.5mm.

This distinction matters when selecting the gland for an actual cable.

Single Compression Specifications

Specification	Dowells Single Compression
Brand	Dowells
Product Type	Brass Cable Gland
Nominal Product Size	75mm
Imperial Reference	3″
Configuration	Single Compression
Dowells catalogue size listing	75mm / 3″
DGP10016 suitable cable OD	68.1–74.0 mm
DGP10017 suitable cable OD	74.1–80.5 mm
Material	Brass
Selection Basis	Actual cable OD
Application	Industrial cable-entry applications

Important sizing note: If your actual cable OD is 75mm, the published selection chart places it within the DGP10017 range (74.1–80.5mm). Do not select DGP10016 simply because the product is nominally labelled 75mm.

For practical sizing guidance, see What Size Cable Gland Do I Need for My Project?, which explains why cable OD is more useful than conductor size when selecting a gland.

Dowells 75mm Double Compression Cable Gland

Double Compression selection requires additional information because the appropriate gland depends on actual cable OD, cable construction and armour arrangement.

For a 75mm-class installation, it is therefore better to identify the cable’s exact OD first and then select the applicable Dowells Double Compression model from the relevant manufacturer table.

Double Compression Specifications

Specification	Dowells Double Compression
Brand	Dowells
Product Type	Brass Cable Gland
Configuration	Double Compression
Nominal Reference	75mm / 3″ class
Material	Brass
Cable Type	Confirm armoured/unarmoured
Cable OD	Must be measured/confirmed
Armour	Verify where applicable
Thread	Confirm against enclosure
Selection Basis	Cable OD + construction + armour
Application	Large industrial cable-entry installations

Do not assign one universal Double Compression product code to every 75mm cable. The correct model can change according to the cable’s measured OD and construction.

For comparison of cable construction and compression types, see our Armoured vs Unarmoured Cable Glands guide.

Single Compression vs Double Compression – 75mm

Feature	Single Compression	Double Compression
Product family	Dowells Single Compression	Dowells Double Compression
Nominal reference	75mm / 3″	75mm / 3″ class
Selection basis	Cable OD	Cable OD + construction + armour
Important OD ranges	DGP10016: 68.1–74.0mm; DGP10017: 74.1–80.5mm	Confirm applicable manufacturer range
Cable construction	Must be verified	Must be verified
Armoured cable	Confirm application	Armour dimensions must be checked
Enclosure entry	Check thread/entry	Check thread/entry
Recommended approach	Measure actual cable OD	Measure OD and confirm cable construction
Best use	Compatible cable-entry applications	Applications requiring Double Compression

Dowells’ selection chart confirms that adjacent nominal sizes can have different cable-OD ranges, which is why the measured cable diameter is essential.

How to Select the Correct Dowells 75mm Cable Gland

1. Measure the Cable Outer Diameter

This is the most important step.

Use the cable manufacturer’s datasheet or measure the completed cable using an appropriate measuring instrument. Do not select the gland solely from the cable’s conductor cross-section.

Our Cable Gland Size & Buying Guide also recommends confirming the actual cable OD before ordering.

Example

If the measured cable OD is:

• 70mm → DGP10016 range may be applicable
• 74.0mm → DGP10016 is within its published upper limit
• 75mm → DGP10017 range begins at 74.1mm
• 80mm → DGP10017 remains within its published range

These examples demonstrate why “75mm gland” and “75mm cable OD” are not interchangeable terms.

2. Identify the Cable Construction

Confirm whether the cable is:

• Armoured
• Unarmoured
• Multicore
• Single-core
• Power cable
• Control cable
• Instrumentation cable
• Flexible or special construction

The cable construction can affect which gland configuration is appropriate.

3. Choose Single or Double Compression

Single and Double Compression glands should not be selected simply because one is a larger or “stronger” version.

The correct configuration depends on the cable construction, armour, installation requirements and manufacturer/project specification.

For additional guidance, see Single vs Double Compression Cable Glands.

4. Check the Enclosure Thread

The cable diameter and gland mounting thread are different measurements.

Before ordering, confirm:

• Enclosure entry
• Thread standard
• Thread size
• Panel-hole requirement
• Available installation space

Never assume that two glands with similar cable ranges have identical enclosure-entry requirements.

5. Check Environmental Requirements

For outdoor or demanding industrial installations, review the required sealing and environmental protection specifications.

Our guide What Is IP Rating on Cable Glands and Why Does It Matter? explains how cable OD, gland selection, enclosure entry and environmental protection work together.

Applications

The Dowells Brass Cable Gland 75mm (3″) can be considered for large cable-entry requirements in industrial electrical installations.

Potential applications include:

• Power distribution equipment
• Electrical panels
• Switchgear
• Industrial control systems
• Large electrical enclosures
• Junction and terminal boxes
• Power-generation projects
• Infrastructure projects
• Industrial machinery
• Plant electrical installations
• Cable termination systems
• Heavy industrial equipment

For armoured installations, the Double Compression configuration should be selected according to the actual cable dimensions and armour construction.

For the broader range of available cable glands, visit the Thunderbolt Cable Gland category.

Why Choose Thunderbolt Electromech India Pvt. Ltd. for Cable Glands?

1. Brand-specific product sourcing

Thunderbolt Electromech supplies cable glands from established brands, including Dowells, helping industrial buyers identify the required brand and product configuration.

2. Technical selection assistance

Large cable glands should be selected carefully. We can help customers evaluate:

• Cable outer diameter
• Single/Double Compression
• Armoured/unarmoured construction
• Gland size
• Thread requirement
• Enclosure entry
• Quantity
• Application requirements

3. Wide Cable Gland Range

Customers can compare different cable-gland sizes and brands through our Cable Gland category.

4. Support for Industrial Requirements

Thunderbolt Electromech caters to requirements from:

• Electrical contractors
• Engineers
• Panel builders
• Industries
• Purchase departments
• OEMs
• Project suppliers

5. Selection Based on Actual Cable Dimensions

We recommend checking the actual cable OD rather than blindly matching a gland’s nominal number.

This is particularly important for larger glands such as 57mm, 63mm, 70mm, 75mm, 82mm, 88mm and 100mm.

Our Cable Gland Supplier India pillar guide provides the broader buying framework.

Frequently Asked Questions

1. What is the Dowells 75mm Cable Gland size in inches?

The Dowells catalogue lists 75mm as 3 inches (3″) in its Single Compression range.

2. What is the Dowells code for 75mm Single Compression Cable Gland?

Dowells’ catalogue associates 75mm / 3″ with DGP10016 in its Single Compression product listing. However, its selection chart gives DGP10016 a cable OD range of 68.1–74.0mm, while DGP10017 covers 74.1–80.5mm. Therefore, the product code should be selected based on actual cable OD.

3. Can I use DGP10016 for a cable measuring exactly 75mm?

Based on Dowells’ published selection chart, no: DGP10016 ends at 74.0mm, while DGP10017 begins at 74.1mm and extends to 80.5mm. If the measured cable OD is 75mm, the DGP10017 range is the relevant published range, subject to confirming the current manufacturer specification.

4. Does a 75mm Cable Gland fit a 75mm cable?

Not necessarily. A nominal gland size and the cable’s actual outside diameter are different specifications. Always compare the cable OD with the manufacturer’s specified cable range.

5. How do I select a 75mm Double Compression Cable Gland?

First measure the cable OD and identify whether the cable is armoured or unarmoured. Then check the relevant Dowells Double Compression selection table for cable OD, armour and gland configuration. Do not select a Double Compression model solely because the cable is described as “75mm”.

6. Is Double Compression better than Single Compression?

Neither should automatically be considered “better.” They are different configurations intended for different cable and installation requirements. The correct choice depends on cable construction, armour, enclosure entry and project/manufacturer specifications.

7. Can a 75mm Cable Gland be used for armoured cable?

It can be considered when the selected gland configuration is designed for the particular armoured cable and the dimensions fall within the manufacturer’s specified range. Armour dimensions and cable OD should be checked before ordering.

8. What information should I send when ordering a Dowells 75mm Cable Gland?

For accurate selection, provide:

• Actual cable OD
• Armoured or unarmoured
• Cable construction
• Single or Double Compression requirement
• Required thread/entry
• Quantity
• Application/project requirement

This is much more reliable than sending only “75mm Cable Gland”.

9. What happens if I choose the wrong Cable Gland size?

An incorrectly sized gland may not grip or seal the cable as intended and may create installation problems. The correct cable OD and manufacturer’s specified clamping/sealing range should therefore be checked before installation.

10. Where can I compare different Dowells Cable Gland sizes?

You can browse the complete Thunderbolt Cable Gland range or use the Cable Gland Supplier India Guide to understand the selection process.