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Cable grommets. A cable grommet is a tube or ring through which an electrical cable passes. They are usually made of rubber or metal. [1]The grommet is usually inserted in holes in certain materials in order to protect, improve friction or seal cables passing through it, from a possible mechanical or chemical attack.
Cable strain relief is a mechanical protection for flexible electrical cables, wires, conduits and pneumatic hoses. It is regulated by the European standard EN 62444 (formerly EN 50262. [2]). With a strain relief component, the connection between a flexible electrical line and its connection port is protected against mechanical stress. Usually ...
Tight fitting rubber grommets can also prevent the entry of dirt, air, water, etc. [6] The smooth and sometimes soft inner surface of the grommet shields the wire from damage. [6] Grommets are generally used whenever wires pass through punched or drilled sheet metal or plastic casings for this reason. [6]
The earth conductor is always stranded (unlike North American usage), with the exception of 1 mm 2 cables, and covered with green-yellow striped plastic insulation. In older cables the plastic insulation of the earth conductor is green. [6] Prior to the introduction of TPS cable, tough rubber sheathed (TRS) cable was used.
Cable glands are commonly defined as mechanical cable entry devices. [4] They are used throughout a number of industries in conjunction with cable and wiring used in electrical instrumentation and automation systems. Cable glands may be used on all types of electrical power, control, instrumentation, data and telecommunications cables.
Ethylene propylene rubber (EPR, sometimes called EPM referring to an ASTM standard) is a type of synthetic elastomer that is closely related to EPDM rubber. Since introduction in the 1960s, annual production has increased to 870,000 metric tons .
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