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Type: Posts; User: kwired

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  1. Replies
    4$$
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    68

    I second that (third I guess), Can you have...

    I second that (third I guess),

    Can you have explosive mixture of combustible dusts underground?
  2. Replies
    6$$
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    64

    Most of these packaged units will be higher then...

    Most of these packaged units will be higher then 28". If you set them on a typical slab, you shouldn't have much to worry about. Should you set the thing into a hole, say to make the rim flush/near...
  3. Replies
    4$$
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    101

    If he had up to 120 volts there should be more...

    If he had up to 120 volts there should be more serious voltage issues around the place if the service neutral is what is lost.

    Could be bootleg ground off the neutral to the indoor...
  4. How much are these dual function breakers...

    How much are these dual function breakers compared to single function AFCI or GFCI?

    I have generally stayed away from GFCI breakers in the past for two reasons, GFCI receptacles are less then GFCI...
  5. Replies
    7$$
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    95

    Kind of a confusing area here. OP says the unit...

    Kind of a confusing area here. OP says the unit needs a 20 amp circuit. What was not mentioned was what is actual MCA and MOCP on the nameplate.

    Very possible the MCA is 15 or less amps yet MOCP...
  6. Thread: Shock Hazard.

    by kwired
    Replies
    11$$
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    176

    Kind of hit some of what I wanted to say there -...

    Kind of hit some of what I wanted to say there - the jumper is there to bridge the gap when the meter is removed, the water dept technician shouldn't be removing it. If he removes it and then removes...
  7. Replies
    13$$
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    249

    Reading that again I guess you maybe answered my...

    Reading that again I guess you maybe answered my question, but I think doing that basically eliminates any reduction of conductor size that is permitted by (B)(7) and is pointless to even look at...
  8. Replies
    13$$
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    249

    Please tell me how you would have made...

    Please tell me how you would have made adjustments to the conductors in my example a couple posts back prior to the 2014 NEC.

    from (B)(7) in 2011: "For individual dwelling units of...
  9. Replies
    19$$
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    415

    Any air leaving an enclosed space needs air to...

    Any air leaving an enclosed space needs air to replace it or you have negative air pressure - hence my calling it make up air. Combustion air may very well be a defined term in fuel gas code, but we...
  10. Thread: Space Nipples

    by kwired
    Replies
    7$$
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    126

    There are nipples that are electrical listed that...

    There are nipples that are electrical listed that look pretty much like that. You may find them more commonly in big box store then in electrical supply houses.

    Though you can use a close nipple,...
  11. Replies
    13$$
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    249

    So before the change how do you go about ampacity...

    So before the change how do you go about ampacity adjustments? all you had was a table that told you overcurrent protection level and a corresponding copper or aluminum cable that was acceptable to...
  12. Replies
    24$$
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    468

    If these poles are covered by NEC, it would be...

    If these poles are covered by NEC, it would be dependent on the loose definition of "equipment" and it's use in 90.2.

    Most stand alone listed assemblies are not covered by the NEC but rather their...
  13. Replies
    21$$
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    579

    That kind of setup is specifically permitted by...

    That kind of setup is specifically permitted by 230.40 exception 3

    But in the absence of that exception I really don't see why it isn't allowed anyway. 230 parts II and III which are for...
  14. Replies
    19$$
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    415

    Good points there as well, if you are exhausting...

    Good points there as well, if you are exhausting air someplace then makeup air must come in someplace. Used to be homes were not so air tight that this was a problem, but anymore we do seal them...
  15. Replies
    19$$
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    415

    Sealing penetrations into the wall cavity where...

    Sealing penetrations into the wall cavity where wiring enters (if you can access them) may be a big help.

    Sometimes depending on construction methods the wall cavity may not be sealed off either....
  16. Replies
    21$$
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    579

    They are most likely feeders, unless there are no...

    They are most likely feeders, unless there are no additional overcurrent devices before the load(s).

    See definitions of branch circuit as well as feeder.
  17. Replies
    24$$
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    468

    The sun is the energy source like the fuel tank...

    The sun is the energy source like the fuel tank for the generator powered by an internal combustion engine. True it is a separately derived source of energy. The electrical system you attempt to...
  18. Replies
    4$$
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    185

    Most 400 amp devices you will find that have...

    Most 400 amp devices you will find that have factory installed lugs are usually a type that will accept multiple conductors, but you may want to double check and not just assume they are.
  19. Thread: Bare neutral

    by kwired
    Replies
    4$$
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    154

    Without looking in NEC my first guess is service...

    Without looking in NEC my first guess is service conductors - yes

    non service conductors - no.

    I base this more on the need to separate grounded/equipment grounding conductors beyond the...
  20. Replies
    21$$
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    579

    In that case it was not two "services" it was 2...

    In that case it was not two "services" it was 2 feeders supplying the building. 225.30 does prohibit a building from be supplied by more then one branch circuit or feeder, with some special...
  21. Replies
    1$$
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    120

    Good question, common sense seems to say the 1/4...

    Good question, common sense seems to say the 1/4 HP is the biggest motor, but the main concern typically is starting current and I can see a good possibility of the compressor drawing more starting...
  22. Thread: 60amp Feeder

    by kwired
    Replies
    4$$
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    208

    That is my answer as well. Is your load over 55...

    That is my answer as well.
    Is your load over 55 sum of non continuous plus 125% continuous?
  23. Replies
    4$$
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    181

    I thought once you cut off a snake's head it will...

    I thought once you cut off a snake's head it will die?;)
  24. Replies
    11$$
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    435

    What you don't want is to place a iron core in...

    What you don't want is to place a iron core in that coil, nail or screw will do, it will create an inductor and it will be in series in your circuit.
  25. Replies
    13$$
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    249

    OP only mentioned SE cable - this would include...

    OP only mentioned SE cable - this would include both SEU and SER unless he specifies otherwise.

    Before 2014 NEC 310.15(B)(7) did not have any requirement to make ampacity adjustments, just select...
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