Cable Gland: Types, Applications, Certification & Selection Guide

Brief Introduction

Cable gland (also known as cable fitting or cable entry gland) is a vital industrial electrical accessory. It is widely used to seal, fix and protect cables penetrating control panels, junction boxes and industrial equipment, ensuring reliable tightness, strain relief and electrical safety for ordinary and hazardous-area installations.

1. Core Functions of Cable Glands

Standard industrial cable glands feature four essential functions to stabilize electrical systems:

• Waterproof & Dustproof Sealing: Achieve IP67/IP68 protection to block moisture, dust and chemical vapors.

• Cable Strain Relief: Prevent cable pulling, twisting and core breakage caused by external force.

• Mechanical Fixation: Firmly lock cables to avoid loosening and vibration wear.

• Explosion-Proof Isolation: Certified explosion-proof glands block flame spread for hazardous zone safety.

2. Common Cable Gland Types

Cable glands are categorized by material and application scenarios for industrial matching:

• Nylon Waterproof Cable Gland: PA66 insulated, low-cost and anti-aging, suitable for indoor general electrical equipment and ordinary workshops.

• Metal Cable Gland: Includes nickel-plated brass and 304/316L stainless steel types, featuring high temperature resistance and anti-corrosion, ideal for outdoor, mechanical and marine environments.

• ATEX & IECEx Explosion-Proof Cable Gland: Exd IIC flameproof grade, applicable for Zone 1/Zone 2 explosive environments such as petrochemical, oil & gas and pharmaceutical factories.

• Armoured Cable Gland: Special locking structure for armoured cables, ensuring mechanical protection and grounding continuity for high-power equipment.

• Flexible Cable Gland: Adapt to frequent bending and vibration equipment to prevent cable fracture.

3. Main Material Characteristics

• PA66 Nylon: Insulating, lightweight, cost-effective for conventional indoor use.

• Nickel-Plated Brass: High hardness, stable sealing, mainstream for general industrial scenarios.

• 304/316L Stainless Steel: Excellent salt spray and acid-base resistance, perfect for coastal and chemical corrosive environments.

4. Common Thread Specifications

Three mainstream thread standards for global industrial matching:

• M Metric Thread: M16/M20/M25 (universal European standard)

• PG Thread: PG9/PG11/PG13.5 (traditional industrial thread)

• NPT/G Thread: American standard, for petroleum and marine engineering

5. Key Industrial Certifications

Certifications determine product compliance for global projects:

• ATEX & IECEx: Mandatory certification for hazardous area explosion-proof use

• IP68: Highest waterproof and dustproof protection grade

• CE, RoHS, REACH: Global environmental and safety compliance

• UL94-V0: High flame retardant safety standard

6. Application Scenarios & 7. Quick Selection Rules

Application Scenarios
Cable glands cover almost all industrial electrical installations: automation cabinets, petrochemical hazardous zones, new energy equipment, marine engineering, mining and tunnel damp environments.

Quick Selection Rules
Select suitable cable glands based on 4 core factors: cable outer diameter, equipment thread type, working environment (corrosion/high temperature), and safety certification requirements (ordinary or explosion-proof grade).

8. Conclusion & Core SEO Keywords

Conclusion
As indispensable industrial accessories, standard cable glands guarantee electrical system stability and safety. Selecting certified, environment-adaptive cable glands effectively avoids equipment failure and project acceptance risks, meeting global industrial electrical installation standards.