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  • Users: JimD1
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  1. JimD1

    NFPA-70E and Relamping

    What are the requirement for PPE / NFPA-70E when replaming 4' fixtures in an office enviroment, HID's, etc? Thanks, Jim
  2. JimD1

    Operator License

    Does anyone know if Rhode Island requires any type of licensed operators for a cogen plant. 400 psi steam, 100k/#/hr boiler, two 4.0 mw gas turbines? Thanks, Jim
  3. JimD1

    Relief valve rating / capacity

    I have two 70-klb/hr boilers running at 125 psi. The management team wants drop the site operating pressure down to 90 psi. I was informed that I need to add relief valves to the boilers due to the decreased operating pressure in the case of an 'event'. This doesn't make sense. Can someone...
  4. JimD1

    NFPA vs NESC

    The NFPA -70E has 6 classes for arc flash, class 0 class 1 - 4 cal/cm2, class 2 - 8 cal/cm2, class 2* - 8 cal/cm2 class 3 - 25 cal/cm2, class 4 - 40 cal/cm2 How does this compare with the NESC? Thanks, Jim
  5. JimD1

    explosion proof receptacle

    If you have an explosion proof receptacle, is it also waterproof. I have a production facility where they are washing the walls with a high pressure nozzle. The walls have explosion proof receptacles on it, I assume that they would also be water tight? Jim
  6. JimD1

    Chiller Flow

    What is the formula to calculate a chiller bundle flow in GPM if the only info you have is the delta T in Fahrenheit and the pressure drop across the bundle in ft/min? Jim
  7. JimD1

    High liquid line temps

    A few of my co-workers are in a discussion about causes for a high liquid line temperatute og an A/C and or refrigeration system. A few of the causes that they list that I don't argee with are : 1. Over charge 2. Bad Valves 3. Partially clogged cap tube or defective TXV As for over charge, I...
  8. JimD1

    Micro Turbines

    I'm interested in touring a facility whare Micro Turbines have been installed. I'm located about 30 miles north of Philadelphia, PA. Any suggestions? thanks, Jim
  9. JimD1

    Micro Turbines

    I'm interested in touring a facility whare Micro Turbines have been installed. I'm located about 30 miles north of Philadelphia, PA. Any suggestions? Thanks, Jim
  10. JimD1

    Linear Amp

    I'm trying to build a 10 meter linear amp (3-30 mhz). About50 watt output using a single motorola mrf454 or equiv transistor. Any Ideas. Any plans can be e-mailed to : jmd445@Aol.Com
  11. JimD1

    Linera Amp

    I'm trying to build a 10 meter linear amp (3-30 mhz). About50 watt output using a single motorola mrf454 or equiv transistor. Any Ideas. Any plans can be e-mailed to : jmd445@Aol.Com
  12. JimD1

    Heat load Calc's

    In an electrical closet I have a 45, 75, 112.5(2) and a 150 kva transformers, 5 total. What figures do I use to calculate the heat gain for airconditioning? The room is 12 x 15.5 ft.
  13. JimD1

    Heat loss/gain Calc's

    In an electrical closet I have a 45, 75, 112.5(2) and a 150 kva transformers, 5 total. What figures do I use to calculate the heat gain for airconditioning?

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