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Type: Posts; User: fifty60

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  1. Replies
    24$$
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    1,264

    I agree the wetting current should be taken into...

    I agree the wetting current should be taken into consideration, but what I am hearing from other Engineers "15 years of experience" is that for these types of applications it is not important. ...
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    10$$
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    551

    I will make a better effort at offering up...

    I will make a better effort at offering up conclusions to my posts. Generally, I get the answers I need from the post and other research/resources and drive on. I understand how this can make it...
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    10$$
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    551

    Generally after I get a lot of feed back I am...

    Generally after I get a lot of feed back I am torn between responding "Thanks everyone" and not saying anything. I was kind of under the impression that a "Thanks everyone" would needlessly bump the...
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    7$$
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    398

    Thanks everyone, this was very helpful. I will...

    Thanks everyone, this was very helpful. I will look at all of the provided references. It is for wire that is already installed, trying to choose between replacing or leaving it as is. The answer...
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    10$$
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    551

    TRANSFORMER LOADED VS UNLOADED

    I have two transformer branch circuits. One is a redundant fan motor for the other one, so that only one fan will be active at a time. There are no other loads on the respective transformer...
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    4$$
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    252

    Voltage Too Low--Damaged Relay

    Can low voltage damage a relay? I have a 120VAC relay, but the actual control voltage was 100VAC. The relay is a big HP rated ice-cube relay, which should handle 1/2HP and 16A, which is well within...
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    7$$
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    398

    Control Circuit 208V--Wire Gauge

    Is it ok to use 16AWG on a contactor coil that is 208VAC? Or, will I have to use 14AWG even though it is just a contactor coil?
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    3$$
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    254

    Oxford Dictionary?

    I know I have read somewhere that the terminology used inside the NEC are defined by the definitions in the Oxford dictionary. Am I remembering this correctly? Or, is it a different dictionary that...
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    4$$
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    285

    Standard RS-485 Port

    What is the standard RS-485 port? Is it an RJ-11? Or, is there not a standard and there could be a DB-9, DB-25, or RJ-11?
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    10$$
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    331

    Thanks, this was all very helpful. What does CPT...

    Thanks, this was all very helpful. What does CPT stand for?
  11. Replies
    10$$
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    331

    Industrial Control Transformer

    Is there any problem with using an Industrial Control Transformer to supply a single phase fan load only? I normally only use general purpose transformers for this, but there are some space...
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    5$$
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    231

    Installing a surge protector similar to this...

    Installing a surge protector similar to this should prevent this right?
    https://www.dehn-international.com/en/node/2377527
  13. Replies
    5$$
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    231

    Why would it only affect two components on the...

    Why would it only affect two components on the panel, and not other similar components?
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    5$$
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    231

    Did Lightning Do This?

    I have a control panel that was operating correctly for over a year. There were bad thunderstorms, and then the control panel stopped working correctly. The fuse protecting the control panel has...
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    1$$
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    184

    Non-metallic Tubing

    Anyone know what the trade name is for non-metallic tubing that has smoother ribbing than this:
    12412

    It looks exactly like the ribbed tubing above, but ribs are much more smooth...
  16. Replies
    3$$
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    244

    Basically the question is when I have a mixed...

    Basically the question is when I have a mixed inductive and resistive load, when sizing a contactor should I base the entire inductive rating off of the full FLA of the machine, or only the inductive...
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    3$$
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    244

    Contactor Sizing

    I am trying to size a contactor to apply/remove power from the entire equipment. The equipment consists of heaters, a transformer, three-phase refrigeration compressors, and a single phase air...
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    5$$
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    291

    "Shall Be Permitted"

    Is "shall be permitted" intended to be all inclusive, or is meant to be open ended? I know "shall" is mandatory, but when the code reads "shall be permitted" does that mean that it is defining all...
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    5$$
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    245

    Would periodical insulation resistance or voltage...

    Would periodical insulation resistance or voltage withstand testing prevent this type of failure?
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    0$$
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    165

    Pendant Station Safety

    Is there a specific OSHA or NFPA document that lays out the minimum safety requirements for Machines operated from a Pendant Station?
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    5$$
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    245

    GFCI and Branch Circuit Protection

    There is equipment that uses open a nichrome wire heating heating elements. I am being told by an NRTL that the wire on the heater failing is a "normal part of the heater life cycle" and that I...
  22. Is type X purge an accepted method for making a...

    Is type X purge an accepted method for making a Class 1 Div 2 location unclassified? NEC says that purging make Class 1 Div 1 unclassified, but it does not clarify if the same is true for class 1...
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    4$$
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    503

    Lock-Out Tag-Out

    Is it the OEM's responsibility to place lock-out tag-out labels on the equipment, or is it the end users responsibility to add this labeling?
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    17$$
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    375

    Not sure what I am missing here...where will I...

    Not sure what I am missing here...where will I find the fill chart for a 10 X 8 X 4 junction box?
  25. Replies
    17$$
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    375

    What if I have a 10" box, 314.16(A) only covers...

    What if I have a 10" box, 314.16(A) only covers up to 4" boxes..
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