![]() Access to the duct bank is gained through utility structures or on the surface, where they can be accessed through vertical bends in the piping. The system also allows for easy replacement of any of the cables. The reinforced concrete covers the PVC conduits to deliver this protection. Single-family homes are less likely to need duct banks, but buildings such as schools, hospitals, office buildings, or data centers are likely to require them.ĭuct banks protect cables from weather damage, corrosion, extreme temperatures, and more. Many public facilities or larger buildings may require extensive duct bank systems for the amount of underground cables they require. A duct bank might be used to provide protection over a short distance, but it can also be used for longer distances, too. Duct banks are used to protect utility wires such as those used for electricity or telecommunications. It is made from PVC conduits, which are then protected further by being encased in concrete. What Is a Duct Bank?Ī duct bank (or sometimes conduit bank) is a protective system for utility wires to keep them safe underground. Duct banks need to be installed safely and efficiently so that utility cables can follow. They are crucial when installing utilities and require a process with several steps to be followed to put them in place. Duct banks offer essential protection to wires or cables so that the utilities installed aren’t damaged and will stand the test of time. Once all the runs of conduit are in place and properly connected, the crew fills the trench with cement and the ends of the pipe are directed into and terminate in approved electrical devices or boxes.Installing duct banks is an important part of connecting various types of utilities. Once more, CANTEX PVC Pipe Solvent Cement needs to be applied with a dauber in between each run.Ĥ. Once again, the entire installation process needs to be repeated for every 10 or 20 feet, depending upon the length of the conduit.ģ. See the CANTEX Full Product Line Catalog for determining the NEC 70 spacer requirements for the necessary trade size of the spacers and the required separation space. The rows of CANTEX PVC Intermediate Spacers are connected for every row of pipe. The amount of spacers coordinates with how many rows of conduit are being installed. Once the trench is completed, CANTEX PVC Base Spacers must be placed in rows in the trench. The process begins with the crew digging the trench.Ģ. Once again, the process for encasing Direct Burial and Encased Burial PVC Utility Duct in cement is basically the same as the cement encasement process for Schedule 40 and 80 PVC Pipe. Once all the runs of PVC DB Conduit are in place and properly connected, the crew fills the trench with dirt.ĭB Direct Burial & EB Encased Burial Cement Installation This process is repeated every 10 to 20 feet, depending upon the length of the conduit.ĥ. The pipe is twisted slightly to secure it. Once the pipe is smooth, the correct type of CANTEX PVC Solvent Cement gets applied to the inside of the belled end and the outside of the spigot or “straight” end of the conduit with a dauber.Ĥ. If the pipe has been cut, a reamer tool must be used to remove burrs or debris before cementing. In between each run of pipe, the belled end of the conduit gets cemented to the straight end. A crew begins by digging a trench for the conduit.Ģ. Consequently, the ends of the DB PVC Conduit runs are directed into and terminate in approved electrical devices or boxes. For example, smoother select fill dirt would be used as back-fill and there are no above-ground applications for Direct Burial PVC Conduit. ![]() DB Direct Burial PVC Utility Duct InstallationĪlthough the direct burial installation for DB PVC Utility Duct is very much the same as it is for Schedule 40 and Schedule 80 PVC Pipe, there are some differences in back-fill requirements and performance capabilities.
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