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  1. Thread: Contactor

    by GoldDigger
    Replies
    2$$
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    27

    The simplest thing to use would be the same...

    The simplest thing to use would be the same circuit that you would use for a push button motor start, and just leave out the stop button.
    The contactor would not normally be used to operate the...
  2. All he was saying was that using those methods...

    All he was saying was that using those methods alone does not meet a code or contract requirement to use "conduit", not that they cannot be combined.
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    15$$
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    258

    Since the load tests are completed automatically...

    Since the load tests are completed automatically in seconds, they can put a 20A 120V load inside and not have it overheat.
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    29$$
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    604

    Only one of each pair of travelers gets counted...

    Only one of each pair of travelers gets counted as a CCC. Beyond that, count everything but the EGC and the neutral of an MWBC.
    And yes, the distance for VD calculation can get large.
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    10$$
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    296

    Without specific contract provisions i think it...

    Without specific contract provisions i think it would only be a problem if your work caused his final to fail OR if your work was substantial enough to require its own permit.
    If the GC rather than...
  6. Replies
    15$$
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    258

    Unless the circuit length is so great that you...

    Unless the circuit length is so great that you have to upsize the CCCs, the standard size EGC will work fine, and the resistance will vary with the circuit capacity.
    And if you upsize the CCCs for...
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    14$$
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    199

    If running wire through the air vent would be...

    If running wire through the air vent would be allowed, I could at least see the inspector requiring a pipe wiring method rather than cable.
    Run properly through the access door frame seems to work...
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    4,763

    I did not know that was what PE stood for. :)...

    I did not know that was what PE stood for. :)
    This Forum is so educational.
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    6$$
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    155

    A good way to see the reasoning behind the wye...

    A good way to see the reasoning behind the wye limitation is to look at a 240V primary and a center tapped 120/240 secondary.
    The primary protection must allow full load current at 240V, but that...
  10. Replies
    15$$
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    271

    I would worry about the oil if the motor were a...

    I would worry about the oil if the motor were a universal type with brushes and a commutator though.
  11. You cannot treat it as two separate busses for...

    You cannot treat it as two separate busses for either 100% or 120% rule. Regardless of the physics, you must keep the sum of the center main and both end sets of breakers (or the sum of first...
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    15$$
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    434

    That sounds good, but it also have implies that...

    That sounds good, but it also have implies that the table is "grounded" as well as connected to the welder return wire. And that is what creates the parallel path which will carry greater current if...
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    13$$
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    303

    The reason that your article got lost is that the...

    The reason that your article got lost is that the NEC "lost" it too. Not sure what year that happened.
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    5$$
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    172

    The AFCI requirement is based more on protecting...

    The AFCI requirement is based more on protecting against wiring faults than equipment faults, so the protected location of the AC units does not mean much.
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    15$$
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    463

    It could not be most of the circuits in that...

    It could not be most of the circuits in that thread since we know that a constant hot goes to all light sockets and I suspect that the lights are not all switched at once.
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    20$$
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    598

    I wish that I could. The first thing required...

    I wish that I could.
    The first thing required is a definition.
    I suspect that soil scientists have a workable definition, probably something related to percent moisture. But I do not know what it...
  17. Some dryers may also have an air flow sensor that...

    Some dryers may also have an air flow sensor that locks out starting the gas burner if the air is blocked or the fan is not running. Modern gas furnaces definitely do that
  18. Replies
    20$$
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    598

    The depth below the ground to the permanent...

    The depth below the ground to the permanent moisture level will not vary by more than an inch or two between a point just outside the overhang versus hard against the footing of the house.
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    16$$
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    332

    I suspect that he was not thinking of the...

    I suspect that he was not thinking of the breakers as bus mounted since there was no obvious panel cover.
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    6$$
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    128

    It is not so much that the continuous motor...

    It is not so much that the continuous motor requires bigger wires (for a particular amperage) than any other continuous load. It is that the 5 minute motor can use smaller conductors because the...
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    9$$
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    210

    The flat face or the ball face? I want to make...

    The flat face or the ball face?
    I want to make sure I get it exactly right. :)
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    6$$
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    173

    It definitely will defeat the ides of high output...

    It definitely will defeat the ides of high output lamps.
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    15$$
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    463

    That allowed them to use shorter distance of hot...

    That allowed them to use shorter distance of hot wire to feed all of the lights and run the more complicated path to each switch using the neutral wire which did not need as careful handling. The...
  24. Replies
    15$$
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    434

    Make sure that the operator is connecting the...

    Make sure that the operator is connecting the return lead to the workpiece rather than the table if possible.
    As stated, there will only be current on the supply EGC if there is an extra connection...
  25. Replies
    16$$
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    332

    The answer to how you provide power to the...

    The answer to how you provide power to the equipment is:
    1. Find the installation instructions and nameplate.
    2. Try to figure out where the incoming wires landed where it was previously installed....
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