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  1. I find it easier to work with whole numbers... So...

    I find it easier to work with whole numbers... So let's take a 120 watt incandescent light bulb. It draws 1 amp on a 120 volt circuit. (P=VI). It also has 120 ohms of resistance. (V=IR).

    those...
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    Also missing is the type of load, and whether or...

    Also missing is the type of load, and whether or not its continuous.
  3. Your installation may be covered more by the NESC...

    Your installation may be covered more by the NESC than the NEC.
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    Is this in a dwelling? Even if so, the exception...

    Is this in a dwelling? Even if so, the exception does not mention trusses. You cannot form a single closed ceiling cavity where trusses are involved without extra work. If the HVAC guy is closing off...
  5. Thread: GFCI quiz

    by JFletcher
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    To add to the list, engine block heaters. there...

    To add to the list, engine block heaters. there has been two or three threads just in the last month about these tripping GFCI.

    I do not have an answer for the battery chargers.
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    Welcome to The Forum. 210.8 B, other than...

    Welcome to The Forum. 210.8 B, other than dwelling units.
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    Welcome to The Forum. There are no NEC code...

    Welcome to The Forum.

    There are no NEC code sections or requirements on the three points to which you inquired. Job spec is an entirely different animal, and may require such provisions.

    To...
  8. Trouble lamps, or fixtures like you provided a...

    Trouble lamps, or fixtures like you provided a picture to, are not going to fly on a commercial or industrial site. They are a clear violation of 590.4 (D).

    However, if said light is plugged into...
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    Another possible alternative: using multiple...

    Another possible alternative: using multiple fixtures with lower intensity LEDs... Or having the ability to turn them on remotely, thus avoiding the shock of going from full darkness to gas station...
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    The pigtail to the box is connected to the EGC in...

    The pigtail to the box is connected to the EGC in the cable serving it. If there were a fault to the box, like an ungrounded conductor popping out of a backstab, or melting its insulation, and it...
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    He is correct. I wonder if line-of-sight can...

    He is correct.

    I wonder if line-of-sight can be accomplished (code wise) with permanently mounted mirrors...
  12. Thread: Generators

    by JFletcher
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    :jawdrop: I didn't realize Brazil made...

    :jawdrop:

    I didn't realize Brazil made generators. I got to agree with Don's post.

    Is there any reason to go with a single phase generator of that size, other than they got a good deal on it?
  13. Regarding Autotransformers, see if they comply...

    Regarding Autotransformers, see if they comply with 210.9, 450.4, and 450.5.
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    A most unique and novel install, if not...

    A most unique and novel install, if not completely ridiculous.

    A dwelling is not a dwelling without a kitchen, and, of all places Florida, I would not expect her configuration would pass building...
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    Also very cool to learn. I have never worked with...

    Also very cool to learn. I have never worked with knob and tube, about the oldest I see is the old armored BX cable, maybe remnants of an old k&t system... Old porcelain insulators in the attic.
    ...
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    Very cool. I am guessing that was not even made...

    Very cool. I am guessing that was not even made on an assembly line; the busbars do not intersect at perfect right angles.

    The little rubber disconnect are in remarkable shape for being a hundred...
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    :thumbsup: The other thing that I like to do...

    :thumbsup:

    The other thing that I like to do on those older wires, which are almost always very short, is to put a Wago on them, tail in new wire pigtails, then push the old wire to the back of...
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    I agree with Larry, it is usually much worse at...

    I agree with Larry, it is usually much worse at light boxes due to heat of the fixture.

    If it is super brittle and cannot easily be replaced, I use a heat shrink kit for electrical wiring that...
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    Excellent point. I'd forgotten about that. if...

    Excellent point. I'd forgotten about that. if someone has gone from switched to unswitched, it's usually done one of two ways... First being just tying together the switched leg and the permanent hot...
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    Just a few things more... Your price on the...

    Just a few things more...

    Your price on the panel is for a MCB panel. Square D qo that I looked up was about the same. A MLO panel is about $250.

    Looking at the way the conduits come into the...
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    In short, figure out the entire scope of work....

    In short, figure out the entire scope of work. What the customer wants, what the customer needs, what upgrades or changes are needed to accomplish this, and what existing code violations must be...
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    Me either. Never seen a local disconnect for one...

    Me either. Never seen a local disconnect for one either, so I presume they don't need one. Come to think of it, I don't even remember seeing a breaker lock on a dishwasher circuit. Maybe it's a...
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    I am having a hard time envisioning the extension...

    I am having a hard time envisioning the extension cord and jumper set up... Could you post a picture?

    If you ran a ground wire to an effective ground, and it did not trip the GFCI, then the...
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    This will certainly work, however it does still...

    This will certainly work, however it does still leave a circuit with parallel neutrals, and if the breakers are of different amperages, it would be wise to remove the wire from the higher amp...
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    You can put a 50 amp range receptacle on a...

    You can put a 50 amp range receptacle on a circuit anywhere from 40 to 50 amps. There are also exceptions for things like welders.

    15 and 20 amp duplex receptacles have the same pass-through...
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