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Type: Posts; User: petersonra

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  1. I think P1-P2 is some kind of temperature sensor....

    I think P1-P2 is some kind of temperature sensor.

    It appears to me the diagram is telling you to bring in 240VAC to T1 and T4 and jumper T2 to T3 for the 240V connection.
  2. Thread: steve

    by petersonra
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    6$$
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    73

    lamp cord. it has to be at least 18 gauge though....

    lamp cord. it has to be at least 18 gauge though. :)

    first question is are they really in parallel? or are they two taps?
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    IMO, the code already requires this, at least for...

    IMO, the code already requires this, at least for white or gray wires.

    see 200.7
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    mccs often have feeders for such things. I do not...

    mccs often have feeders for such things. I do not see any particular advantage or disadvantage.

    I see no reason to add a transformer unless you need to change the voltage.

    You can even buy...
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    i have one in my office for the same reason. if...

    i have one in my office for the same reason. if it is not big enough I go to a conference room and use a larger one and take cell phone picture when I am done.

    I even have one in my kitchen to use...
  6. you can connect 100 of them up if you want to.

    you can connect 100 of them up if you want to.
  7. I don't doubt that but it also probably does not...

    I don't doubt that but it also probably does not qualify as a GE under the NEC.
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    It will not hurt it any to remove the accumulated...

    It will not hurt it any to remove the accumulated dust and lint as long as you do so in a gentle way.

    Replacing the motor on things like this can be done but as often as not it is more cost...
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    18$$
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    I doubt a little lint makes it run hot. A lot of...

    I doubt a little lint makes it run hot. A lot of motors run too hot to touch comfortably.

    If it bothers you a rag and some isopropyl alcohol is about as good as it gets for this kind of cleaning.
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    it is more the rules on the type of air gun that...

    it is more the rules on the type of air gun that can be used and the pressure limits allowed.
  11. I think you are correct. I think the idea of...

    I think you are correct.

    I think the idea of using the rebar in the base as a GE is dubious. Take a look at what the code says can be used as a GE and see if there is anyway it could qualify.
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    I would suggest a vacuum cleaner in lieu of...

    I would suggest a vacuum cleaner in lieu of compressed air. There are some interesting OSHA rules about the use of compressed air for such purposes that are routinely ignored. And as another poster...
  13. Thread: Class Div 1

    by petersonra
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    Look very carefully at what the exceptions...

    Look very carefully at what the exceptions actually say.



    Take a close look at the contact blocks. They may already be sealed contact blocks.
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    I think in a previous post he said the plans...

    I think in a previous post he said the plans called for it to be done this way.

    There are so many things on the same circuit it might be all but impossible to isolate it.



    You may be on...
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    Whatever OCPD you provide, be it CB or fuse, it...

    Whatever OCPD you provide, be it CB or fuse, it has to have an interrupting rating that exceeds the available fault current. The only way you can select an appropriate CB is if you know what the...
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    I prefer a negotiated amount. Usually fairer and...

    I prefer a negotiated amount. Usually fairer and simpler.
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    what tests do you think need doing on any regular...

    what tests do you think need doing on any regular basis that would require any input at all from the AHJ?

    and keep in mind that just having a vague idea how to do a test does not make one actually...
  18. Thread: Why NRTL ?

    by petersonra
    Replies
    11$$
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    344

    many of them have pretty decent ratings though...

    many of them have pretty decent ratings though when protected by fuses.
  19. Thread: Why NRTL ?

    by petersonra
    Replies
    11$$
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    344

    my guess might be that the evaluators did not...

    my guess might be that the evaluators did not look real close. most iec contactors are rated at 65k with class j fuses.
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    as long as they are accessible I see nothing...

    as long as they are accessible I see nothing wrong. it might make for a bit of a troubleshooting nightmare, but that is not a code issue.
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    because I was curious I called up a manual for...

    because I was curious I called up a manual for one of the Mitsubishi units. It shows a fuse on the 220V going outside that is found on the control board.
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    I think you have several choices. 1. Change...

    I think you have several choices.

    1. Change the cable to 12/3.

    2. Install a 15A CB on the hot lines of the 14/3.

    3. Make the manufacturer fight it out with the inspector.

    If the...
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    us the area under the ground actually classified?

    us the area under the ground actually classified?
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    if you are using a GP xfmr, you probably need to...

    if you are using a GP xfmr, you probably need to allow for the inrush.

    machine tool transformers will allow for the inrush though. a rule of thumb for machine tool transformers is to size it no...
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    http://www.homedepot.com/p/Halex-1-2-in-Rigid-Box-...

    http://www.homedepot.com/p/Halex-1-2-in-Rigid-Box-Spacer-91641/100144864?N=5yc1vZbohkZ1z113etZ1z117rg

    something like this?
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