Conduit systems are generally classified by the wall thickness, mechanical stiffness, and material used to make the tubing. Materials may be chosen for mechanical protection, corrosion resistance, and overall cost of the installation. Wiring regulations for electrical equipment in hazardous areas may require particular types of conduit to be used to provide an approved installation. How to use steel conduit properly in wire system application is a very important job before starting your project.
In the practical applications, how to choose the proper type of steel conduit for the installation indoors or outdoors, in dry or wet locations, exposed or concealed atmospheric conditions, mainly requires certain professional knowledge as well as other considerations before your project. In addition, GRC conduit is a raceway solution which allows for future wiring changes and delivers remarkable mechanical protection to conductors and cables. Rigid steel conduit is manufactured from mild steel tube, which has an accurate circular cross section, a uniform wall thickness, a defect free interior surface, and a continuous welded seam. The interior and exterior surfaces are thoroughly and evenly coated with zinc through the hot dipped galvanized process, in order to form the galvanic protection against corrosion. A clear coating of zinc chromate is also applied. Additional lubricating coating may be applied to the interior surface to reduce friction during wire insertion.
Hot dipped galvanized steel pipe has been considered popular a lot among many users today. In most cases, hot dipped galvanized steel pipe serves as a useful bonding conductor for grounding due to its good performance of anti-corrosion in service. However, some wiring regulations may also dictate workmanship standards or supplemental means of grounding for certain types. While metal conduit may sometimes be used as a grounding conductor, the circuit length is limited. For example, a long run of conduit as grounding conductor may have too high an electrical resistance, and not allow proper operation of overcurrent devices on a fault. When installing galvanized steel pipe in the actual application, steel pipe users should pay more attention to the requirements of specific distance between the pipes. Generally speaking, users should consider the pipe parallel laying between the water supply system and the drainage system indoors. And the specific distance between the pipelines should be based on the actual situation in different environments, which in particular should be taken into account during the actual installation.
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Post time: Jul-15-2019
