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  1. anfeng

    telecomm wiring next to high voltage

    Hey dcp,I wasn't making a decision, I was trying to stimulate some response, which apparently worked! Yes eyrp, I agree that fiber would be the best way to go. But there may also be some analog lines for phone, intercom, and radio communication, which was where I was concerned with the 60hz hum.
  2. anfeng

    telecomm wiring next to high voltage

    Since no one has replied to my question, I can only assume that no one has experienced any problems with telecommunication wiring installed adjacent to high voltage distribution wiring. I assume that this situation would commonly occur in campus type areas. The most informative web site that I...
  3. anfeng

    telecomm wiring next to high voltage

    Is it acceptable practice to route telecommunications lines adjacent to high-voltage distribution lines in an underground duct bank? This particular situation involves a 7200 volt primary electric cable in 4” pvc conduit, serving up to 150 kVA of load. In the same trench, in another 4” pvc...
  4. anfeng

    Rust in reinforcing steel

    The definitive reference on the subject of rust on rebar is: Kemp, Brezny, and Unterspan "Effects of Rust and Scale on tth Bond Charactereistics of Deformed Reinforcing Bars" ACI Journal, Proceedings V.65, No. 9, Sept. 1968, pp. 743-756 The "Commentary on Builiding Code...
  5. anfeng

    Necessary testing during installation of HDPE Pipe Force Main?

    from the Driscopipe web site, PRESSURE TESTING DRISCOPIPE SYSTEMS Driscopipe piping systems should be pressure tested before being put into service. Water is the preferred test medium. After all free air is removed from the test section, raise the pressure at a steady rate to the required...

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