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Type: Posts; User: GoldDigger

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  1. What I should have said is that you can smell...

    What I should have said is that you can smell hydrogen sulfide at levels well below the toxic level, while with sulfur dioxide the two levels are much closer.
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    Yes, it would, but it would have to carry the...

    Yes, it would, but it would have to carry the full power of the machine just to provide the control power in a form the machine expects.
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    Instantaneous surge is more likely to be a...

    Instantaneous surge is more likely to be a problem when restarting a motor that has not yet coasted to a full stop or in shorter terms has not had time for the induced field to decay.
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    The NEC provides requirements for protection of...

    The NEC provides requirements for protection of the primary side, whether high or low voltage. If these are met, then the transformer will be protected.
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    Notice that the voltage selection taps are on the...

    Notice that the voltage selection taps are on the H side. If the transformer is very tightly designed, then it is important to have the taps on the input side to avoid potential core saturation.
    In...
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    It used to be below the last post. And I suspect...

    It used to be below the last post. And I suspect that I have seen it recently in a post other than the last one, but I cannot swear by that.
  7. I think it is important to distinguish between...

    I think it is important to distinguish between surge (limited time event such as nearby lightning, VAR switching, failure that bridges lines until OCPD kicks in)
    and voltage overload (i.e. wrong tap...
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    I agree with your point. The earlier sections...

    I agree with your point.
    The earlier sections of 210.8 specifically apply to only 15 and 20 amp circuits, but the section on residential boat hoists (i.e. dwelling unit locations) does not have any...
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    If you only have to interface with the 240V...

    If you only have to interface with the 240V secondary of an existing transformer, there is no difference from a 240V service. If you are installing the MV transformer, then it is a lot different.
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    Basically it is a function of the relationship...

    Basically it is a function of the relationship between the per length capacitance and per length inductance. It has no DC component. You change the characteristic impedance by changing the size of...
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    Just as a side note, the connectors are not just...

    Just as a side note, the connectors are not just sized to fit the mechanical characteristics of the cable, they are also internally designed for a transmission line impedance of either 50, 75 or 90...
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    Some posts now contain a large Mike Holt ad on...

    Some posts now contain a large Mike Holt ad on the right side of the screen. If you have ads blocked all you will see is that the text is squished up on the left.
    I have no problem with MH ads being...
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    OK, some of us lost track of the high leg delta...

    OK, some of us lost track of the high leg delta specification.
    Even easier for that case, a simple 120-0-120 autotransformer between A and C will supply the neutral that equipment requires for...
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    Well, it mentioned "internet company". If the...

    Well, it mentioned "internet company". If the provider wants broadband cable internet connectivity, then 75 ohm would be appropriate. But it is not clear from the OP that that was what was intended.
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    RG-8 is also a 50 ohm cable and can be used for...

    RG-8 is also a 50 ohm cable and can be used for longer distances than RG-58.
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    There are two different commonly used types of...

    There are two different commonly used types of coaxial cable. One type (including RG-6), used for CATV, video and most RF purposes has a characteristic impedance of 75 ohms.
    The other type,...
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    Well, the big question is whether installing the...

    Well, the big question is whether installing the CB with the line on the inverter side would be legal since there would occasionally be power flowing just into the GTI and the "load" side would...
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    If this was a series arc across the contacts...

    If this was a series arc across the contacts there would be no excess current to blow the fuse.
    If it was a parallel arc to ground, it was ahead of the fuses in the circuit, so again they would not...
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    It would be a violation if you actually grounded...

    It would be a violation if you actually grounded the center point. But you would be creating a derived neutral and that neutral will not be bonded to ground, since the hot leads are already ground...
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    I think that to visibly melt the metal of the...

    I think that to visibly melt the metal of the door (at least it looks like that to me from the photo) you would need an arc and not just a hot spot.
    Never mind, that is just blistered paint.
    I do...
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    Another principle that may or may not be...

    Another principle that may or may not be practical is to insert a metal shim an inch or two into the cable, between the inner conductors and the sheath, and cut with a knife until you hit that shim....
  22. Thread: bonding

    by GoldDigger
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    Currently (2011 and 2014), there is no .56 and...

    Currently (2011 and 2014), there is no .56 and .53 says that if a rod electrode is used it must be supplemented by one of a list of types which specifically does not include an underground water...
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    I think it is pretty clear from the picture that...

    I think it is pretty clear from the picture that the arc was located either at the left hand switch contact or the upper left hand fuse clip.
    Based on the handle being jammed and looking at the...
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    But to use it safely you need to know what phase...

    But to use it safely you need to know what phase the equipment connects its control power source to. It must not be the high leg, since the neutral is only a neutral with respect to the A and C phase...
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    I do not know of any GFCI or AFCI breaker that is...

    I do not know of any GFCI or AFCI breaker that is rated for backfeed. The fact that the electronic circuitry in the breaker consumes power and is connected on the line side of the contacts makes for...
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