Cable Glands are devices that are critical when terminating cables in hazardous or harsh environments, where ingress protection, sealing and grounding is necessary to safely pass a cable, wire or tube through an enclosure. They provide strain relief and are also designed to contain electrical sparks or flames that may occur in hazardous environments. Additionally, they act as a seal, preventing outside contaminants from causing damage to the cable and electrical systems, such as dust, dirt, and fluids. Finally, they prevent cables from twisting and being pulled out of the machine, as they help to provide a secure connection between the cable and the machine to which it is attached.
They are designed for use with either armoured or non-armoured cable. When used with armoured cable, they provide a ground to earth for the cable design.
They can be made of a variety of metals and plastics, depending on their application, including stainless steel, plastic, brass, and aluminum.
Because they are designed with safety in mind, it is important that cable glands carry one or more of the following electrical safety specification ratings, such as NEC, CEC, ATEX, IECx or similar depending on the country of origin and use.