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Type: Posts; User: Jraef

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  1. Replies
    17$$
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    297

    Yes but the drive must be designed for that, it's...

    Yes but the drive must be designed for that, it's called a "flange mount" option; you can't just rig up some brackets for a regular drive. It's a great idea though because the heat sinks out the back...
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    17$$
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    297

    +1 on the previous comments, this supplier is...

    +1 on the previous comments, this supplier is using gross rules of thumb that may or may not apply. One of those that floats around a lot is that if you take the size of the manufacturer's NEMA 1...
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    28$$
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    1,147

    I did a startup on a 600HP blower with a soft...

    I did a startup on a 600HP blower with a soft starter. I built the soft starter, so my contract included the startup. The same thing happened to that 600HP motor, big blue flame came right out of the...
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    28$$
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    1,147

    Temperature extremes just from being in...

    Temperature extremes just from being in California? How hot do you think it gets here? :lol:
    Most modern motors use class H insulation, but even if it was class F, the max temperature in storage or...
  5. Replies
    28$$
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    1,147

    "High leg" means absolutely nothing with regard...

    "High leg" means absolutely nothing with regard to the phase-to phase voltage, so if feeding a single phase 230V rated motor, it can ONLY be phase to phase. You CANNOT get anything higher than that....
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    12$$
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    374

    In theory if it was a 240V corner grounded delta...

    In theory if it was a 240V corner grounded delta and A was the grounded phase, the B to ground would be 240V. But so would C to ground, so it would be odd to word the sign like that. Maybe it was...
  7. Measured where to where? Phase to phase it's the...

    Measured where to where? Phase to phase it's the same. Phase to the Wye point will be 58% (1/1.732).
  8. Replies
    24$$
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    1,561

    Chances are everything in there is actually 120V...

    Chances are everything in there is actually 120V loads, but even if not, it will be electronic and most modern electronics now use switching power supplies that will not care, with the newest being...
  9. From an Arc Flash hazard risk standpoint...

    From an Arc Flash hazard risk standpoint (different from the risk of shock), once the door is open and there is anything live in that box, you are exposed to the danger, so your PPE is required.
    ...
  10. Replies
    5$$
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    188

    They all MUST be the same size. I don't think...

    They all MUST be the same size.
    I don't think that the added ampacity at 110C will be of use anyway; there is no 110C column in the NEC.
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    2$$
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    155

    If it's in front of a Main CB, I agree, that's...

    If it's in front of a Main CB, I agree, that's pretty much the only reason to do it.
  12. Thread: New Lugs....

    by Jraef
    Replies
    10$$
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    786

    I agree though, cable bending radius is mentioned...

    I agree though, cable bending radius is mentioned in the video as in how the cable is affected, but they never mention the effect this might have on equipment clearances. A lot of equipment is...
  13. Replies
    6$$
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    316

    Yeah, really. Not sure if you were told something...

    Yeah, really. Not sure if you were told something or thought you read something in the 2014 code that changed anything, but it looks exactly the same to me. 408.3 is the only place where it mentions...
  14. My friend who is a housing inspector (in MPLS)...

    My friend who is a housing inspector (in MPLS) says that for them, the issue is indeed related to "finished living spaces", and their big concern there is that landlords are renting, or allowing sub...
  15. Thread: EGO Lawnmower

    by Jraef
    Replies
    5$$
    Views
    421

    About 5 years ago Black and Decker was closing...

    About 5 years ago Black and Decker was closing out a 36V battery powered mower for $150, I bought one for my small lawn. It's holding up great and has plenty of power for tall grass when I forget to...
  16. Thread: What is this?

    by Jraef
    Replies
    13$$
    Views
    1,141

    I was thinking an emergency exit light, on a DC...

    I was thinking an emergency exit light, on a DC circuit originally battery powered. I saw some places from the 50s with something similar. Someone may have given up on having to maintain the battery...
  17. Replies
    3$$
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    287

    Interesting that you caught the almost exact...

    Interesting that you caught the almost exact duplicate post that linked to a different supplier of the same Chinese part. But in addition to that, the poster has only made one other post, including a...
  18. Replies
    26$$
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    1,071

    adamscb, Eutectic melting alloy OL relays are...

    adamscb,
    Eutectic melting alloy OL relays are being phased out because they are now illegal in most of the world under the RoHS (Reduction of Hazardous Substances) rules. There are metal compounds...
  19. Replies
    4$$
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    215

    First, did you make absolutely sure the motor...

    First, did you make absolutely sure the motor nameplate data entered into the VFD parameters is correct? Autotune has to start off with correct motor nameplate data, it does not do that for you. Even...
  20. Replies
    26$$
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    1,071

    Just FYI. They changed that last year. Fewer...

    Just FYI. They changed that last year. Fewer switches, more ports per switch (10, 20 or 30), but now the switches consume unit space, where before they were in the wireway of each section. Still, I...
  21. Replies
    3$$
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    211

    And that's why God created Dollar Stores... I...

    And that's why God created Dollar Stores...

    I knew a woman in the 90s who worked as a buyer, briefly, for Costco. She bought a boatload of portable work lights from China and although they...
  22. Replies
    26$$
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    1,071

    LOL, as I think about your response, it makes me...

    LOL, as I think about your response, it makes me realize that I am trying to help another customer through an issue right now wherein their experienced electricians are aging out and the city won't...
  23. Replies
    26$$
    Views
    1,071

    Most likely they will be on the Upside column. If...

    Most likely they will be on the Upside column. If you've ever gone onto the forum at Control.com, their motto at the top of the page is "Nerds in control". They live for that... :p

    I suppose it's...
  24. Replies
    26$$
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    1,071

    Opinions on "Intelligent MCCs"

    I am in the midst of a project where we are proposing, and promoting, the use of "Intelligent MCCs", i.e. with an Ethenet network inside, connected to all starters (with smart OLs), VFDs, Soft...
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    3$$
    Views
    299

    It's a decision made by NEMA when the entire...

    It's a decision made by NEMA when the entire concept of standard NEMA sizes arose so that if a US equipment mfr sent machinery to Canada, or a Canadian mfr sent something to the US, the starter sizes...
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