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Type: Posts; User: GoldDigger

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  1. Replies
    8$$
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    159

    If it can be done, I would consider snaking a...

    If it can be done, I would consider snaking a smaller flexible conduit through the 4" PVC to provide separation.
    The inspector does not have a logical leg to stand on, but overriding him might take...
  2. In general under the NEC it is allowed to...

    In general under the NEC it is allowed to interrupt the grounded conductor with a switch or OCPD if it also interrupts all ungrounded conductors at the same time.
  3. Replies
    39$$
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    1,485

    I thought that the stranded wire had less...

    I thought that the stranded wire had less resistance for AC because of the reduction in skin effect.
    Inductive reactance may scale differently; I have not run the math.
  4. One very small problem with your "free" energy...

    One very small problem with your "free" energy from a wood stove and the -20 degree outside is that any heat engine works by moving heat energy from a hot area to a cold area. You burn more wood as a...
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    13$$
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    584

    I wonder just how SE manages to set current and...

    I wonder just how SE manages to set current and voltage levels for each of the strings independently when they are combined into one inverter input?
    Possibly they set a loose voltage requirement and...
  6. Replies
    1$$
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    173

    The RF ground electrode would probably qualify as...

    The RF ground electrode would probably qualify as an auxiliary electrode and therefore not have to be bonded to the building GES.
    If you choose to bond it, the bonding jumper used for that purpose...
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    16$$
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    889

    I sympathize, but have no way to do that. Try...

    I sympathize, but have no way to do that.
    Try thinking of what would happen when you take three separate transformers with unequal inputs and isolated windings. Measure the secondary voltages and...
  8. I have seen something like that in white PVC...

    I have seen something like that in white PVC water pipe. It is only usable for low pressure, like after an irrigation valve. And it crushes much more easily.
    On the upside, it is easier to bend. :)
  9. Replies
    39$$
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    1,656

    Not to mention how everything would work if you...

    Not to mention how everything would work if you turned it upside down.
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    17$$
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    563

    If there is induced magnetism in the workpiece or...

    If there is induced magnetism in the workpiece or residual magnetism in the magnets because of hysteresis (iron instead of air core), then a short reverse pulse may speed release.
  11. Thread: RV trailer

    by GoldDigger
    Replies
    13$$
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    453

    The most common equipment in "classic" RVs is a...

    The most common equipment in "classic" RVs is a "power converter" which combines an inverter, a charger, and often a transfer switch for shore power all in one unit.
    Adding solar PV by adding...
  12. Replies
    16$$
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    436

    A selenium rectifier typically consists of a...

    A selenium rectifier typically consists of a number of disks on a common insulated shaft.
    What you are seeing is probably the configuration of a number of separate disk stacks with interconnections...
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    7$$
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    326

    The intensity of LED lighting will not be...

    The intensity of LED lighting will not be proportional to the applied voltage. This is because there will be a near constant voltage drop across the string of LEDs. Below a threshhold voltage there...
  14. True at least in part. n addition to the normal...

    True at least in part.
    n addition to the normal battery powered off-grid inverter a typical hybrid inverter will also have an internal grid pass-through and transfer switch/relay as well as the...
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    4$$
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    299

    You can only reclassify from class 2 to class 1,...

    You can only reclassify from class 2 to class 1, not in the other direction
    When you reclassify, you are obligated among other things to add a label to the class 2 power supply to indicate that it...
  16. Replies
    2$$
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    172

    If it is a lath and plaster wall, there were a...

    If it is a lath and plaster wall, there were a number of years that used expanded metal lath. If that lath became energized by accidental contact with a hot wire, then it would cause the whole wall...
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    26$$
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    937

    Yes, even if not in this thread yet.

    Yes, even if not in this thread yet.
  18. Replies
    4$$
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    299

    I think that if you do not reclassify the circuit...

    I think that if you do not reclassify the circuit as Class 1, you are allowed but not compelled to use Chapter 3 methods. And a mix is OK.
    On the other hand, if you reclassify to Class 1 so that you...
  19. Replies
    43$$
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    955

    If the source is wye, you will have a problem...

    If the source is wye, you will have a problem connecting the motor windings to the three hots and getting 277 line to line. As long as both ends of each winding are brought out independently you...
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    9$$
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    383

    More likely it was designed and rested at a time...

    More likely it was designed and rested at a time when NEC did not require in use covers and the design was never changed. It still meets the current UL standard.
  21. Replies
    16$$
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    889

    Look at it this way: The three windings in...

    Look at it this way:

    The three windings in the delta secondary (call them a, b and c) form a triangle. The vector equation a = b +c has to be satisfied to keep current from circulating. The bold...
  22. Replies
    15$$
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    622

    If some place needs more than 125A total, do they...

    If some place needs more than 125A total, do they get two meters and split the loads into two panels?
  23. Replies
    57$$
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    2,329

    I guess that the idea was that many people had a...

    I guess that the idea was that many people had a key to the same transfer lock or set of transfer locks, so that next shift to come in and work on the machinery could remove the transfer lock on...
  24. Not all that uncommon. A trial lawyer had to...

    Not all that uncommon.
    A trial lawyer had to call a plumber to unclog his sink.
    After 20 minutes the plumber presented the lawyer with a bill for $200.
    The lawyer said that even as a prominent...
  25. Sunking would have jumped in at this point to...

    Sunking would have jumped in at this point to tell you that the rates in the Peoples's Republic of Austin are only that high because they are subsidizing RE and spending utility money on other...
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