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  1. Replies
    4$$
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    190716-1702 EDT nickelec: If you work with...

    190716-1702 EDT

    nickelec:

    If you work with motors over about 1/2 HP, then you run into power dissipation problems doing different types of tests. One HP is close to 746 W, and 6.2 A at 120 V. A...
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    4$$
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    190715-2344 EDT nickelec: Try something not...

    190715-2344 EDT

    nickelec:

    Try something not too large. Possibly 1/3 to 1/2 HP at 2000 RPM and 110 V.. Look for surplus of some kind. Possibly Bodine. Bodine also has some simple motor controls...
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    3$$
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    190715-2234 EDT An interesting table:...

    190715-2234 EDT

    An interesting table:
    http://www.ipsr.ku.edu/ksdata/ksah/energy/18ener7.pdf

    .
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    3$$
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    190715-2129 EDT It is interesting to look at...

    190715-2129 EDT

    It is interesting to look at the Ludington pumped storage capacity of 2172 MW vs Monroe coal fired at 3280 MW.

    Hoover Dam can produce about 2000 MW, and Grand Cooley 4250 MW.
    ...
  5. Thread: NYC power outage

    by gar
    Replies
    14$$
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    606

    190715-2016 EDT ggunn: I was using the...

    190715-2016 EDT

    ggunn:

    I was using the 70,000 customers to try get an estimate of the size of a single transformer to support that load. But I also don't think a single transformer was the...
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    Michigan power generation

    190715-1520 EDT

    Ran across this interesting discussion:
    https://en.wikipedia.org/wiki/List_of_power_stations_in_Michigan

    .
  7. Thread: Dimming complaints

    by gar
    Replies
    25$$
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    634

    190715-1107 EDT nickelec: If everything is...

    190715-1107 EDT

    nickelec:

    If everything is underground, and if you know where the transformer is, then poke the screwdriver in close to the transformer.

    Since we have this complication, then...
  8. Thread: Dimming complaints

    by gar
    Replies
    25$$
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    634

    190715-1031 EDT nickelec: What I am...

    190715-1031 EDT

    nickelec:

    What I am suggesting is go to the pole transformer pole, and you will find a wire coming down the pole that attaches to a ground rod at the pole. This is the rod I am...
  9. Thread: Dimming complaints

    by gar
    Replies
    25$$
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    634

    190715-1024 EDT nickelec: Those are...

    190715-1024 EDT

    nickelec:

    Those are significant voltage changes. But you have to do some correlation with what is happening in the home or elsewhere. That is why you do your own controlled...
  10. Thread: Dimming complaints

    by gar
    Replies
    25$$
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    634

    190715-0957 EDT All the wires from the power...

    190715-0957 EDT

    All the wires from the power company transformer to the main panel input terminals are likely the same material and size, and thus each has the same resistance. If an overhead line...
  11. Thread: Dimming complaints

    by gar
    Replies
    25$$
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    634

    190714-2352 EDT nickelec: You need a DVM...

    190714-2352 EDT

    nickelec:

    You need a DVM with at least 0.1 V resolution on a range that reads 120 V. Usually called a 3 1/2 digit meter. In some ways a 4 1/2 digit meter is too much resolution....
  12. Thread: NYC power outage

    by gar
    Replies
    14$$
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    606

    190714-2202 EDT An added comment not related...

    190714-2202 EDT

    An added comment not related directly to the NYC problem.

    Our shop is getting a new (replacement) substation. This is about 1/2 mile away from the shop, and about 1 mile from...
  13. Thread: NYC power outage

    by gar
    Replies
    14$$
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    606

    190714-1945 EDT The reporting on this problem...

    190714-1945 EDT

    The reporting on this problem is interesting.

    It has been said that about 70,000 customers lost power. I am not in the power industry and have little knowledge about it. But...
  14. Replies
    12$$
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    550

    190713-0940 EDT charlie b: My guess --- it...

    190713-0940 EDT

    charlie b:

    My guess --- it is to provide reasonably good earthing of conductive parts of the manhole to local earth. Thus, leakage current to these conductive parts would be...
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    30$$
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    1,236

    190712-1415 EDT paulengr: You are making...

    190712-1415 EDT

    paulengr:

    You are making something simple look complicated. Don't bring in extraneous factors.

    Again you are mixing counter EMF with current.

    The basic simple factor is...
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    2$$
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    190712-0730 EDT Stevenfyeager: ptonsparky...

    190712-0730 EDT

    Stevenfyeager:

    ptonsparky gave you a good answer, you need to know current changes.

    I can not understand your question or layout. Also you need to paragraph your writing.
    ...
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    30$$
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    1,236

    190711-0846 EDT paulengr: That is an...

    190711-0846 EDT

    paulengr:

    That is an incorrect statement.

    Torque is proportional to current for a constant magnetic field in which that current is flowing. It is true that if a servo spindle...
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    30$$
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    1,236

    190710-1948 EDT paulengr: A true RMS...

    190710-1948 EDT

    paulengr:

    A true RMS measurement includes both the DC component and any AC component added to it.

    Most electronic voltmeters labeled "true RMS" only measure the RMS value of...
  19. 190707-1140 EDT This post will get back to a...

    190707-1140 EDT

    This post will get back to a discussion of the first post.

    Neither UL or NEC is a direct connection to how a circuit works. But both are generally, and sometimes very closely...
  20. Thread: voltage drop

    by gar
    Replies
    7$$
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    316

    190706-2104 EDT enireh: I believe you mean...

    190706-2104 EDT

    enireh:

    I believe you mean maximum voltage drop, not minimum.

    What is the purpose of your question? Is it will equipment fail? Or does it relate to something like light...
  21. 90706-1709 EDT jaggedben: Assume that you...

    90706-1709 EDT

    jaggedben:

    Assume that you uniformly load the bus bars in a panel to 200 A, and feed all this current from one end. Then the source end is hottest defined by 200^2 at that end....
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    190706-1617 EDT mbrooke: It grows very...

    190706-1617 EDT

    mbrooke:

    It grows very fast.

    One resistance: one connection.

    Two resistors: A or B or AB parallel or AB series. Four as you said.
  23. 190706-1530 EDT kwired: My mistake in not...

    190706-1530 EDT

    kwired:

    My mistake in not titling the comment directly to romex jockey. But my post immediately followed his post in sequence.

    .
  24. 190706-1424 EDT My post #35 had nothing to do...

    190706-1424 EDT

    My post #35 had nothing to do with code, or any likely condition, or the original post.

    My post #35 was in response to romex jockey's question in post #34 as to why. I used...
  25. Thread: HOT/NEU Reversal?

    by gar
    Replies
    68$$
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    2,896

    190706-0940 EDT drcampbell: So far I have...

    190706-0940 EDT

    drcampbell:

    So far I have not seen that you have used an extension cord to get some good voltage reference points.

    With an extension cord, an 0.1 V resolution meter on a...
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