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  1. lou1952

    Arc flash spreadsheet

    Steve, You are right, I copied the wrong number for the 363kV level. By the way, and you probably know this, but ArcPro only uses the voltage to ensure the arc is sustained. Whether you run the study at 362kV or 209kV, you get the same answer. As far as the table values, if what you say is...
  2. lou1952

    Arc flash spreadsheet

    I began reading this particular discussion today. I have been doing arc flash studies for 3 years now and I still learn something new everytime I work on a new plant. I looked at the OSHA Table 9. Using ArcPro, I tried a couple of different data points and a couple were right on. 72.5kV, 20kA...
  3. lou1952

    NFPA-70E

    NFPA 70E paragraph 310.5(C)states "THe requirements of 130.3, Flash Hazard Analysis, shall not apply to electrolytic cell line work zones. IEEE 1584 paragraph 1.2 states that "Single-phase ac systems and dc systems are not included in this guide." So what to do? We are considering going back to...

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