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Type: Posts; User: GoldDigger

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  1. Replies
    1$$
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    18

    Some do. Some are standalone. Some are wireless...

    Some do.
    Some are standalone.
    Some are wireless (Wi-Fi).
    Some networked systems use twisted pair Ethernet (CAT), others use proprietary communication links.
  2. Thread: 911 phone

    by GoldDigger
    Replies
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    It can be either a special line which...

    It can be either a special line which automatically selects 911 at the central office or a special phone which autodials 911 when it goes off hook. In the latter case the line will also be restricted...
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    With PVC plumbing pipe (extensive irrigation...

    With PVC plumbing pipe (extensive irrigation systems) I have had three broken joints and every one of them, by the color of the separated pipe, had no primer and almost no cement.
    The proper cement...
  4. If you do not have a disconnect with OCPD, the...

    If you do not have a disconnect with OCPD, the wires remain service wires and must be sized for the full total load. Depending on how far the group of meters extends, an AHJ may have a problem with...
  5. If raceways are a wet location, presumably the...

    If raceways are a wet location, presumably the inside of the pole is too.
  6. Special relativity tells us that nothing material...

    Special relativity tells us that nothing material can be perfectly rigid or incompressible, else you would have pressure waves traveling faster than the speed of light and other paradoxes. :)
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    Chances are that the potential for the broken...

    Chances are that the potential for the broken ground path is much less than 1 volt because of the parallel metallic neutral path. You can calculate the approximate voltage knowing the current and the...
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    Since you have only the neutral, you would need...

    Since you have only the neutral, you would need to install a GES for the building and also bond the neutral to the ground/ EGC to provide a fault clearing path.
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    And except in a thermal hot springs area, the...

    And except in a thermal hot springs area, the ground temperature will be less than the air temperature in the summer.
    The cooling effect on the wires will be almost as good as free air.
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    1. You say a couple of speakers. Is that one...

    1. You say a couple of speakers. Is that one stereo pair or are you looking at putting two speakers in parallel on one output? If the latter, make sure you receiver/amplifier can handle a 4 ohm load...
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    Since the equipment (motor) was described as 240V...

    Since the equipment (motor) was described as 240V three-phase, it seems unlikely that it includes any L-N 120V loads in its design.
    Now that could be 240 delta or 240Y that it needs. But far more...
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    If you are limited to standard values, not using...

    If you are limited to standard values, not using adjustable equipment, you would end up using a 15 breaker, to comply with both min and max, and maybe suffer some nuisance trips.
  13. 1. Inspection of US wiring usually includes...

    1. Inspection of US wiring usually includes either random or every receptacle device testing with a plug in tester that will indicate reversed hot/neutral.
    2. Two breakers with tied handles will not...
  14. Replies
    36$$
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    IMHO a motor load which does not have a duty...

    IMHO a motor load which does not have a duty cycle specified is still not a continuous load as that multiplier does not apply to motors. Maybe to appliances, but for motors it has already been...
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    "BUZZ" :)

    "BUZZ" :)
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    But beware that the dimmer manufacturer may have...

    But beware that the dimmer manufacturer may have made some "improvements" to their product since the compatibility tests were made.
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    Was one of the choices to pull out the damaged...

    Was one of the choices to pull out the damaged wire and replace it?
    Other than that you pretty much need to add a junction box of some sort unless the original wiring is K&T.
  18. Thread: Signs

    by GoldDigger
    Replies
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    296

    Poll: I voted for in sight of controller only not...

    I voted for in sight of controller only not because the language was clear but because the intent was discernible. It did not hurt that that the Handbook explicitly supports this view and restates...
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    125$$
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    Which would not explain either the non-AFCI...

    Which would not explain either the non-AFCI breakers switching off as well or the handles going to the off instead of tripped position.
    Not to mention that the arc signature recognition is gated by...
  20. Thread: 555.3

    by GoldDigger
    Replies
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    388

    To me the critical distinction is that each...

    To me the critical distinction is that each circuit needs protection *before* it enters the dock area.
  21. If the isolation monitor uses less than 5ma...

    If the isolation monitor uses less than 5ma current (maybe changing a current limiting resistor?), or uses a slowly rather than rapidly switched pulsed DC it would not set off the GFCI.
    Similarly...
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    595

    It is the effect that running a wire through a...

    It is the effect that running a wire through a ferrous ring or sleeve creates a single turn iron core inductor (also called a choke). That inductance will restrict current flow and create a voltage...
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    What are the ratings of the branch breakers in...

    What are the ratings of the branch breakers in the original panel? If they are also high you have another indication that you need to get an actual available short circuit current calculation.
  24. When the building has a panel with a feeder, the...

    When the building has a panel with a feeder, the single branch circuit allowance is often interpreted so as to allow a three way outdoor light circuit originating at the house to have its garage-end...
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    595

    If you cut a slot from one hole to another and...

    If you cut a slot from one hole to another and then screw on a ferrous nut that bridges the cut slot you might see extra heating in the locknut, probably only at very high current.
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