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  1. TNMaster

    I came across an old thread (2005)

    @ bacon4life You said the magic word, system. Most electricians and EEs I have encountered in my career have oversimplified the ampacity table in using it to select wire. I joined this forum to improve my knowledge because after 47 years of industrial maintenance and over 20 years as a licensed...
  2. TNMaster

    I came across an old thread (2005)

    Interesting read for sure but it just underscores my point. A lot of reference is made to the ampacity tables in NEC which in my long experience, is usually read incorrectly. According to the NEC and its commentary (the one written by 3 of the six gentlemen who actually sit on the committee)...
  3. TNMaster

    I came across an old thread (2005)

    The cable derating does not affect the temperature of the connectors, it's true. My point is that the temperature of the connectors affects the cable rating in regard to the NEC ampacity of conductors chart. Therefore, THHN cannot be used at its 90C rated amperage, even when derating is or is...
  4. TNMaster

    I came across an old thread (2005)

    Not so much a question as my perspective based on 40+ yrs in the field and my understanding of the NEC. Was just wondering how that measured up to the EE perspective. Was not aware of the point on the molded case breakers. Goes to show there is always something to be learned. That point was not...
  5. TNMaster

    Float switch issues

    A more direct answer to your actual question, Pat is yes. It is typically call a "Debounce" circuit. It prevents transient signals from affecting normal operation. It can be program logic or relay logic. In your application, for the sake of economy and simplicity (assuming your application uses...
  6. TNMaster

    Voltage Divider (current not stable)

    ALL well said; plus remember that dynamic values, even in R&D Lab Quality components rarely match static values when installed in a system unless tested in the system and selected to do so.
  7. TNMaster

    I came across an old thread (2005)

    I came across an old thread (2005) discussing the benefits of XHHW over THHN. A lot of reference was made to the temp rating of the wire in regard installation and de-rating. I know the NEC states that no component of a system can be rated higher then the lowest rated component. There was a...

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