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Type: Posts; User: GoldDigger

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  1. Replies
    1$$
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    21

    Maybe because the 8kw rating is at 240V? Many...

    Maybe because the 8kw rating is at 240V?
    Many generators cannot deliver their rated output through only half of the output winding.
    For example, I have a generator that has a 20A 240V output, but...
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    14$$
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    243

    And now for our next episode of "Nipples In...

    And now for our next episode of "Nipples In Spaaaaace!"
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    6$$
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    136

    BOY is not a Code specified standard, and at a...

    BOY is not a Code specified standard, and at a site with a high leg supply (service or SDS) you would have to use a different color or tag indicator for your 480Y/277.
    Hypothetical question:
    What...
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    6$$
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    92

    Except when the single wire insulation is...

    Except when the single wire insulation is required by code to be rated for the maximum line to line voltage, as in 600V and under.
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    10$$
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    126

    Since the OP mentioned a three wire delta, I did...

    Since the OP mentioned a three wire delta, I did not consider line to neutral loads. Yes, that case could get above 200A on the ungrounded lines, but would give you zero if you include the neutral....
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    11$$
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    395

    If you originate branch neutrals in a bar in the...

    If you originate branch neutrals in a bar in the pull box, wouldn't you have to run all of the hots and the neutral feeder through the same nipple to avoid inductive effects from unbalanced currents?...
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    10$$
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    126

    The answer to that question is given in part by...

    The answer to that question is given in part by the knowledge that if the source voltages are balanced the maximum unbalanced current with loads with the same displacement power factor but worst case...
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    10$$
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    183

    From the description, I suspect that the unit has...

    From the description, I suspect that the unit has unswitched pass through protection (15A) as well as a switched output. But if that is the case it apparently does not interrupt the neutral the way a...
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    10$$
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    200

    I still think that the "fried" breaker would have...

    I still think that the "fried" breaker would have to result from a stray voltage on the ungrounded conductor OR the neutral pigtail from the breaker not being solidly landed, allowing the neutral...
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    10$$
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    126

    I guess the question is whether you want to be...

    I guess the question is whether you want to be able to measure the maximum possible zero sequence current or just detect a fairly low level current and not worry about saturating at the maximum...
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    10$$
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    200

    In the advanced formatting bar the capital letter...

    In the advanced formatting bar the capital letter A is the button for changing the font color for the selected text.
    Or you can look at the result and just type in the appropriate HTML tags for the...
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    6$$
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    177

    Even ones that used to have no delay may be...

    Even ones that used to have no delay may be "improved" at any time. :)
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    9$$
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    158

    It also sounds like you want to get some idea...

    It also sounds like you want to get some idea whether the service is really too small for the calculated and real load or else the service is not delivering what it should in terms of amps and...
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    10$$
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    183

    At least they provide a good indication of...

    At least they provide a good indication of reasons for using the switch, including when the first outlet (well to avoid arguments we will say the first device) on an existing branch is a switch.
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    20$$
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    500

    But if you close too many of the air infiltration...

    But if you close too many of the air infiltration sources, you may increase the internal negative pressure to the point that flame sources like furnace, wood stove, or water heater do not get enough...
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    3$$
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    193

    Yes, for some people frequent is at least once. :)

    Yes, for some people frequent is at least once. :)
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    2$$
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    123

    Do you really need the extra ampacity that badly?

    Do you really need the extra ampacity that badly?
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    3$$
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    193

    Depends in part on whether the installation...

    Depends in part on whether the installation instructions for the case allow cord and plug connection, as well as whether the case will be moved (for cleaning, etc?)
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    24$$
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    497

    Nor is a car, nor an airplane.... Is a portable...

    Nor is a car, nor an airplane....
    Is a portable generator a structure, or is the ground rod just required by the instructions?
  20. "Too indirect of a connection", as for example...

    "Too indirect of a connection", as for example that a single line fault in the motor side would effectively be driven by all three supply lines in parallel? Not to mention the energy storage in the...
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    10$$
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    200

    "When an AFCI is used the circuit fries the...

    "When an AFCI is used the circuit fries the breaker."
    That sounds like the breaker is being back fed when off, leading to a shunt trip type coil carrying a constant current rather than a momentary...
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    25$$
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    391

    But you would be OK with an irreversible crimp...

    But you would be OK with an irreversible crimp and tap which produced the same geometry, yes?
  23. IMHO the 10'/10% exception does not say anything...

    IMHO the 10'/10% exception does not say anything about the reason that one section has a lower calculated ampacity than the other. So you can use it for fill, for bundling, for roof temperature, etc....
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    11$$
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    448

    Absolutely. What the iron/steel core adds is a...

    Absolutely. What the iron/steel core adds is a many times higher inductance for the same wire configuration. It also greatly improves the coupling between two windings when they are wound on a common...
  25. The code is not really clear on what you have to...

    The code is not really clear on what you have to do when different adjustments and corrections apply to different parts of the same circuit, but common sense would say that if the area of the...
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