Cable glands are defined as ‘mechanical cable entry devices’ which are used in conjunction with cable and wiring for electrical, instrumentation & control, and automation systems, including lighting, power, data and telecoms.
The main functions of the Cable Gland are to act as a sealing and terminating device to ensure the protection of electrical equipment and enclosures, including the provision of:
• Environmental protection – by sealing on the outer cable sheath, excluding dust and moisture from the electrical or instrument enclosure.
• Earth continuity – in the case of armoured cables, when the cable gland has a metallic construction. In this case cable glands may be tested to ensure that they can withstand an appropriate peak short circuit fault current.
• Holding force – on the cable to ensure adequate levels of mechanical cable ‘pull out’ resistance.
• Additional sealing – on the part of the cable entering the enclosure, when a high degree of ingress protection is required.
• Additional environmental sealing – at the cable entry point, maintaining the ingress protection rating of the enclosure with the selection of applicable accessories dedicated to performing this function.
• Fire-stop cable gland which can withstand fire propagation through a barrier
• Explosion-proof cable glands
• EMI and RFI shielding and associated grounding features to minimise or eliminate electromagnetic or radio frequency interference
Different cable gland materials perform differently depending on the application, environment and cable type.
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