Search:

Type: Posts; User: Smart $

Page 1 of 8 1 2 3 4

Search: Search took 0.08 seconds.

  1. I am uncertain how that xfmr is listed Class 2. ...

    I am uncertain how that xfmr is listed Class 2. According to Table 11(A), the power source of over 30V through 150V cannot have a VA rating greater than 0.005A x Vmax. In this case, that'd be...
  2. Motor operated louvers typically require open and...

    Motor operated louvers typically require open and close limit switches and motor reversing controls. You have not mentioned any, so I want to make certain these are covered also. If you open the...
  3. You should power this circuit through auxiliary...

    You should power this circuit through auxiliary contacts.

    Your 480:120 xfmr is required to have protection. At 50VA puts it under 2A on primary. Being a 2-wire secondary you can use primary only...
  4. Replies
    32$$
    Views
    790

    Argued, of course... the argument being minimum...

    Argued, of course... the argument being minimum required size vs. minimum permitted size. With Code not specific to that degree, there's no resolution without opinion or agenda entering the decision.
  5. Replies
    32$$
    Views
    790

    It is optional, as "shall be permitted" means in...

    It is optional, as "shall be permitted" means in addition to being allowed, it is not required.

    Given that it is optional, I do not consider a 3/0 Cu conductor as upsized... unless I would have...
  6. Replies
    15$$
    Views
    566

    And we all know what happens when that membrane...

    And we all know what happens when that membrane is an inflated balloon.
  7. Replies
    48$$
    Views
    1,483

    Still curious as to type of conduit? And why...

    Still curious as to type of conduit?

    And why not some other non-conduit-type of piping? I realize you are likely not involved in the design aspect of the project and likely cannot answer... but...
  8. Replies
    15$$
    Views
    566

    Don't need a list. If you are trying to say a...

    Don't need a list. If you are trying to say a destructive test isn't really destructive, you are not going to make any headway challenging me.

    First of all, whether that 1mA is a result of...
  9. Replies
    15$$
    Views
    566

    Be aware there are two different dielectric...

    Thank you for that info. I did not realize there was a difference between an insulation resistance test and a dielectric withstand test. I have always ramped up to a set voltage and held for a set...
  10. Replies
    32$$
    Views
    790

    This is how the first part is broken down...

    This is how the first part is broken down properly:


    The main power feeder portion only applies to feeder conductors.
  11. Staggered starting has no bearing on minimum...

    Staggered starting has no bearing on minimum conductor ampacity if both motors can or will be operated concurrently.

    What regulations permit you to use ICEA ampacity while imposing the NEC...
  12. Replies
    48$$
    Views
    1,483

    That'd be correct thinking. :D

    That'd be correct thinking. :D
  13. Replies
    48$$
    Views
    1,483

    An explosionproof coupling isn't what you think...

    An explosionproof coupling isn't what you think it is if you haven't worked in C1D1 environs alot.

    14344
  14. Replies
    12$$
    Views
    336

    Haven't heard that word mentioned for near 30...

    Haven't heard that word mentioned for near 30 years. What's the world coming to. :slaphead:
  15. Replies
    48$$
    Views
    1,483

    That's all semantics. If the explosion occurs...

    That's all semantics. If the explosion occurs only within the confines of the enclosure and/or conduit, then it contains the explosion.

    When a very slow-leaking bucket is full of water, it...
  16. Thread: GEC & Bonding?

    by Smart $
    Replies
    31$$
    Views
    710

    It is not... as has already been confirmed by the...

    It is not... as has already been confirmed by the others.

    As mentioned by mwm1752, do not read the paragraph as one run-on sentence. There are similar instances throughout the Code. Learn to...
  17. Thread: GEC & Bonding?

    by Smart $
    Replies
    31$$
    Views
    710

    Bonding only one end isn't always an option. We...

    Bonding only one end isn't always an option. We think this way because we often install grounded services. When installing an ungrounded service, you have no choice* but to bond both ends, because...
  18. Thread: GEC & Bonding?

    by Smart $
    Replies
    31$$
    Views
    710

    I'm uncertain we are on the same page here. There...

    I'm uncertain we are on the same page here. There are only two variations this conduit-to-enclosure bonding: 1) impaired, and 2) not impaired. In both cases you must use a bonding means enumerated...
  19. Thread: GEC & Bonding?

    by Smart $
    Replies
    31$$
    Views
    710

    Impaired connections are addressed, but not the...

    Impaired connections are addressed, but not the topic.

    The topic is bonding. Such bonding shall not rely solely on standard locknuts or bushings.

    Where a connection is impaired, the bonding...
  20. Replies
    15$$
    Views
    566

    FWIW... Dielectric is just another word for...

    FWIW...


    Dielectric is just another word for insulation.
  21. Replies
    12$$
    Views
    336

    Could be the instructor is going by the answer...

    Could be the instructor is going by the answer key. Also, I know for a fact that some, many JATC tests are questions computer selected pool of questions.... and the answer key is generated at the...
  22. Replies
    48$$
    Views
    1,483

    SAE (Society of Automotive Engineers) is not...

    SAE (Society of Automotive Engineers) is not involved here. I believe the NPT standard is covered by ANSI (American National Standards Institute).
  23. Replies
    12$$
    Views
    336

    I agree with your answer. [bold red in quote...

    I agree with your answer.

    [bold red in quote indicates typo]
  24. Replies
    12$$
    Views
    336

    The forum leaders here want students to show...

    The forum leaders here want students to show their work, perhaps reasoning, and answer to prove we are not being asked to do their homework or answer test questions...;)


    Welcome to the forum....
  25. Replies
    48$$
    Views
    1,483

    Sounds about right for handling anything...

    Sounds about right for handling anything involving radioactive material... :happyyes:
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4