Search:

Type: Posts; User: fifty60

Page 1 of 8 1 2 3 4

Search: Search took 0.92 seconds.

  1. Replies
    10$$
    Views
    273

    Looks like their MJN line will work...

    Looks like their MJN line will work...
  2. Replies
    10$$
    Views
    273

    Thanks for the information everyone, as always...

    Thanks for the information everyone, as always extremely helpful. If anyone can recommend a 230V single pole ice cube relay that has a HP rating o 1/3HP, I would greatly appreciate it. My usual...
  3. Replies
    10$$
    Views
    273

    The relays are definitely rated to make and break...

    The relays are definitely rated to make and break the load, yet they are still turning black after less than a year of use. Is it normal for the relays to turn black after only a years use?

    I...
  4. Replies
    10$$
    Views
    273

    The relays actually have a 2500VA interrupt...

    The relays actually have a 2500VA interrupt rating. For an inductive load this would still be the measured current multiplied by the voltage. My load is 2.9A at 230V gives me 667VA...
  5. Replies
    10$$
    Views
    273

    HP Rated Relays

    What is the difference between inrush ratings of a relay and HP rating. Would the HP rating have to be used to confirm that you can break the inductive load, while the in rush is just to cover the...
  6. Replies
    14$$
    Views
    479

    Thanks for reminding me of that. For a typical...

    Thanks for reminding me of that. For a typical wall outlet, that has 1 line at approximately 110V to a ground reference, and the other line at approximately 0V to ground reference, is it technically...
  7. Replies
    14$$
    Views
    479

    So can a true technical Neutral only exist in a 3...

    So can a true technical Neutral only exist in a 3 wire system, as the 4th grounded conductor?
  8. Replies
    14$$
    Views
    479

    Phase to Neutral 110V

    I understand that the 110V that enters an American household is actually half of a single 220V phase. The 110V is derived from the grounded center tap of a transformer before it enters the home. Is...
  9. Replies
    14$$
    Views
    340

    I believe it reads or as well. The motor does...

    I believe it reads or as well. The motor does not have an internal overload, I am not sure why.
  10. Replies
    14$$
    Views
    340

    I have it mostly figured out except for the fact...

    I have it mostly figured out except for the fact that it is a 1.25 service factor motor, which allows 125% rounded down, but its temperature rise is above 40 C, so I would have to go to 1.15%. Is...
  11. Replies
    14$$
    Views
    340

    It is an automatic start motor. It will be an...

    It is an automatic start motor. It will be an air circulator motor inside of a refrigeration/oven chamber. Refrigeration equipment itself is not a general purpose equipement. Would the motor...
  12. Replies
    14$$
    Views
    340

    430.32(1) says "Motors with a marked temperature...

    430.32(1) says "Motors with a marked temperature rise 40 C or less 125%". I would get this information from the insulation rating right? In this case it is Class F insulation. The temperature...
  13. Replies
    14$$
    Views
    340

    So a dual element fuse or a thermal magnetic...

    So a dual element fuse or a thermal magnetic breaker would qualify, even though it would be serving the dual purpose of short circuit protection and overload protection?
  14. Replies
    14$$
    Views
    340

    I've read through section III of article 430 (NEC...

    I've read through section III of article 430 (NEC 2011) and do not see the exception that allows you to use a single thermal-magnetic breaker or dual element fuse as short circuit AND overload...
  15. Replies
    14$$
    Views
    340

    I seem to remember reading that a single thermal...

    I seem to remember reading that a single thermal magnetic circuit breaker could be used in place of the short circuit OCPD and separate overload....
  16. Replies
    14$$
    Views
    340

    Overloads for Motors

    Is it a requirement that motors have overloads? I understand why motors have overloads. The branch OCPD is only providing short circuit protection, and without it there is absolutely no overload...
  17. Thread: BX Connector

    by fifty60
    Replies
    9$$
    Views
    391

    I am trying to comply with a standard (IEC-61010)...

    I am trying to comply with a standard (IEC-61010) and it states:

    "A compression bushing shall not be used as a cord anchorage unless it is suitable for use with the MAINS supply cord supplied...
  18. Thread: BX Connector

    by fifty60
    Replies
    9$$
    Views
    391

    BX Connector

    Are BX connectors considered compression bushings?
  19. Replies
    19$$
    Views
    495

    I am getting the 50mm^2 from the attached chart. ...

    I am getting the 50mm^2 from the attached chart. This is giving me the cross sectional area (47mm^2), which is much different than the 171.6mm^2 given in table 5. Anyone know why this is?
  20. Replies
    19$$
    Views
    495

    This is what is confusing me. I have 4...

    This is what is confusing me. I have 4 conductors that are each 50mm^2. I times this by 4 and get 200mm^2. I refer to table 4 in chapter 9 and see that for over 2 wires, 40 % fill, 1 1/4 conduit...
  21. Replies
    19$$
    Views
    495

    Sizing Conduit---Metric

    I normally have four #1AWG THHW conductors that I run through 1 1/4" EMT. I would like to size this to the equivalent metric. The closest standard metric size to #1AWG is 50mm^2. Four 50mm^2 wires...
  22. Replies
    58$$
    Views
    1,993

    I have an intrinsically safe RH...

    I have an intrinsically safe RH transmitter/sensor. The transmitter will be installed in the unclassified location and the RH sensor will be installed in the Class I Div II location. It would not...
  23. Replies
    3$$
    Views
    182

    Would the resistance method work for measuring...

    Would the resistance method work for measuring transformer winding temperature? The transformer is a small 1KVA industrial control transformer. Can I use a standard issue fluke multimeter?
  24. Replies
    3$$
    Views
    182

    Derating Transformers

    I have a transformer that is rated for an ambient of 40 C. My ambient is getting to about 46 C. I am not using the full capacity of the transformer. Since I am not operating the transformer at...
  25. Replies
    14$$
    Views
    438

    The Appleton cable gland strain relief that I...

    The Appleton cable gland strain relief that I have accepts cables with an outside diameter of up to .75 inches. .75 inches converts over to 19.05mm. All of the 4 core steel wire armoured cable that...
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4