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  • Users: weh3
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  1. weh3

    SKM: Has anyone figured out the data file formats?

    SKM stores its database information in text files divided into 512-byte records. It's easy enough to identify the file and record headers and field terminators, but I can't correlate the actual data to the model; maybe it's a hash. To streamline building a large model, I would like to enter...
  2. weh3

    CAD work

    I have worked in various environments where the range of expectation ran the gamut: 1. One place where engineers were not allowed or expected to CADD, because they were paid to be engineers, not CADD techs; 2. One place where engineers were expected to do any CADD necessary; 3. One place...
  3. weh3

    Undergrounding of Power Lines

    DavidBeach: If you put a single conductor in each conduit, will you not get severe inductive heating effects, or is that somehow not so with transmission lines? WEH
  4. weh3

    Contracted by Two Clients for Same Project

    And get it in writing. William
  5. weh3

    FE/PE Exam Advice

    Go to ppi2pass.com as a starting point. I actually found the EE reference manual for about US$85 somewhere else. Look around. William
  6. weh3

    FE/PE Exam Advice

    I did both FE and PE, starting fourteen years after college. You have to set aside lunch hours and Saturday mornings for working problems. Get the PPI-2-Pass books and work every problem you have time for, starting with Math 101. Get a sample exam and work every problem over and over until...
  7. weh3

    Contracted by Two Clients for Same Project

    Good eye, MJ. In that case, MattP should provide Company A with price recommendations instead of Company B. It is just like doing an engineering or construction estimate as the designer. William
  8. weh3

    Contracted by Two Clients for Same Project

    I would not see a problem as long as everything is above board and ther is no kickback or anything of the sort from Company B. It makes sense that they would use your expertise in pricing it. The interests not conflicting but complementary. William
  9. weh3

    PT Connections

    But you had better get it right the first time, so you don't wring the alternator off its shaft. William
  10. weh3

    transformer

    Most plants can be operated without 220 (or 240, whatever you want to call it). You will probably end up with a 45kVA 480 to 208Y/120V three-phase dry-type transformer mounted on a concrete pad on the floor. At 208V, a 30 kVA xf will serve a 100A main breaker, 45kVA will serve a 150A MB. William
  11. weh3

    What is the value of a Benefits plan?

    rj: The advice from this forum seems to be for you to get out of the situation. Your transition from ignorance to enlightenment is obvious as one reads through it, but now that you are no longer ignorant, you can't just wait to see what happens. Make a copy of this discussion--it names names...
  12. weh3

    PT Connections

    Star for db. William
  13. weh3

    Motor switch size

    With an FLA of 650A, your O/C can be as high as 2000A. The 250% FLA is a maximum value for O/C, but it can be less than that. If you are using soft starts or VFD's, then your protection can be lower. I would look for a way to get three molded-case CB's in those two 1600A cubes. William
  14. weh3

    Motor switch size

    The 1000A GF requirement is for service entrances (230-95). You still need O/C protection and a disconnecting means for each motor. The disconnect must be at least 115% of the FLA, unless it is rated for the horsepower of the motor. In your case, the disconnect must be either 800A or 525 hp...
  15. weh3

    CSI specification format

    There are specialized programs for doing that. I worked for a Defense Contractor A/E that had a full-time spec typist using Specsintact. Try CCB.org. William
  16. weh3

    light dimmer save energy?

    Question somewhat related to the thread: Does anyone know how those devices work that allow you to touch a metal part of the lamp to turn it on? ItSmoked: Where do you live, that you pay $0.26/kWh? Yikes! William
  17. weh3

    Motor starting current and genset size

    If your generator cannot handle the starters, then it cannot handle the motors. It is possible that phasor voltage difference between the source and the motor is greater than if the motor is stopped. Why does it matter whether the coils are held in during a changeover? Why don't you put a...
  18. weh3

    Grounding connection

    Then the reason could be a simple practical matter of allowing you to get behind it to make connections. William
  19. weh3

    Explain heat rise difference 60hz vs. DC

    The 140A value under discussion is probably the RMS (root-mean-square) value, that is, the effective DC value. From a resistance perspective, there is no difference in heating of the wires, but there would be heating attributable to inductive effects that would not be present in the DC case...
  20. weh3

    Grounding connection

    It's to make sure that the only path to the literal ground is through the grounding electrode conductor by way of the main bonding jumper. William

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