While the term "trunking system" can refer to various things, in the context of electrical installations, the three main types are based on the material used: metallic, PVC, and bus-bar trunking.
Here's a breakdown:
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Metallic Trunking: This type uses metal, typically steel (including GI - Galvanized Iron) or aluminum, for its construction. It offers excellent mechanical protection and electromagnetic shielding.
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PVC Trunking: Made from Polyvinyl Chloride (PVC), this trunking is lightweight, non-conductive, and resistant to corrosion. It's often used in environments where moisture or chemicals are present.
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Bus-bar Trunking: This is a specialized type used for distributing high currents. It consists of prefabricated components containing busbars (copper or aluminum conductors) within a protective enclosure. This is typically used for high-power distribution in industrial settings.
It is important to note other classifications such as outdoor trunking and multi-compartment trunking exist, but these typically are variations or specialized applications of the three main material types above. Outdoor trunking would often be metallic or high-grade PVC while multi-compartment trunking is constructed of the material most applicable to the environment it will be placed.
