STA (Steel Tape Armoured) and SWA (Steel Wire Armoured) cables are both types of electrical cables that are used for the transmission of electricity. These cables are typically used in underground or underground installations, or in areas where the cable may be subject to mechanical damage. The main difference between the two types of cables is the type of armor used to protect the conductor.
STA cables have a layer of steel tape wrapped around the conductor to provide mechanical protection. The steel tape is applied in a spiral fashion, with each layer overlapped slightly to provide full coverage. The tape is typically made of a galvanized steel alloy, which provides excellent corrosion resistance.
SWA cables, on the other hand, have a layer of steel wire wrapped around the conductor to provide mechanical protection. The wire is typically made of a galvanized steel alloy and is applied in a spiral fashion, with each layer overlapped slightly to provide full coverage.
Both STA and SWA cables are generally suitable for use in underground installations, as they are able to withstand the mechanical stresses that can be caused by soil movement and other external factors. They are also resistant to moisture and corrosion, which makes them suitable for use in damp or wet environments.
Overall, the choice between STA and SWA cables will depend on the specific requirements of the installation and the level of protection needed for the conductor. Both types of cables are widely used in the electrical industry and are an effective means of transmitting electricity in a variety of applications.
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