A cable gland is a device designed to secure the end of an electrical cable to the equipment. The gland provides strain relief, including the ability to make an electrical connection to the armature or braid.
Cable glands are mechanical cable entry devices. They are used in a number of industries in conjunction with cables and wiring used in electrical instrumentation and automation systems. The cable glands can be used on all types of electrical power, control, instrumentation, data, and telecommunications cables.
They are used as a sealing and termination device to ensure that the characteristics of the enclosure into which the cable enters are properly maintained.
Cable glands are used to easily assemble and disassemble cables and jackets. In addition, it can also provide EMC shielding along with stranded cables or offer other special features useful for dedicated applications such as grounding, potential equalization, isolation, bending protection, or any combination of these features.
A cable gland does not provide an electrical connection between the individual scores of the inserted cable and any device within the sheath. Therefore, it is not an electrical device. A cable gland will be connected to a liner by a threaded hole or by a locknut or clip mechanism
Bushings intended to resist dripping water or water pressure will include synthetic rubber or other types of elastomeric seals. Certain types of cable glands can also serve to prevent the entry of flammable gas into equipment cabinets for electrical equipment in hazardous areas.
Cable glands are used for all types of:
• Data and telecommunications cables
• Instrumentation cables
• Control cables
• Electric power cables
These are the four main materials that cable glands are made of:
• The plastic
• Stainless steel