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  • Users: tivester
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  1. tivester

    Victaulic Couplings in Data Center

    Twice within the last 5 years at two different data centers we have had a bolt fail on a Victaulic coupling of our chilled water piping. Both failures resulted in massive leaks and water damage. Luckily the damage was not to the data center floor itself, however similar piping is used under...
  2. tivester

    What are the requirements/guidelines for coordination studies?

    Is there a requirement or guidline for performing a new coordination study/short circuit analysis when a facility's existing electrical system has had changes and additions made to it? While I assume it is best practice to do this, is there a section of the NEC, NFPA, or IEEE standard that...
  3. tivester

    Cleaning of Electrical Equipment

    Many companies are fond of wanting/needing the building to be electrically active long before construction is completed. I am trying to develop a standard for our electrical contractor for the manner in which electrical equipment is to be left when the building is handed over to the owners. Is...
  4. tivester

    Who can perform arc flash studies?

    I tried to see if this question had already been answered, but did not find it specifically. I would like to know if there are any requirements for the qualification of persons performing an arc flash study such as PE, special certification,etc.
  5. tivester

    CAT SR4 Voltage Regulation Problems

    I work at a data that is backed up by 3 CAT 3516 diesel engines with SR4 generators and VR3 voltage regulators. Two years ago in our 2nd generator we experienced a voltage regulation issue that was resolved by replacing the voltage regulator. We are now again having voltage regulation...
  6. tivester

    High Fundamental Frequency in Voltage Transformer Neutrals

    I am a data center technician for a financial company in St. Louis, MO. I have my EIT certification and along with my other duties am involved in various projects throughout the company's St. Louis campuses. I was recently asked to perform some basic harmonic analysis at one of the large...

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