1. Forum
  2. Usenet
  3. REC.CRAFTS.METALWORKING

  • 208-230 vs 230

    From Bob La Londe@21:1/5 to All on Mon May 1 18:54:41 2023
    I am looking at motors right now and notice some are labeled 208-230 and
    some are labeled just 230.

    I do not need a lecture on the difference between star and delta. I am
    aware that tap to tap is 230(ish) on delta, and tap to tap is 208(ish)
    in star services. I've worked on both. When I was a kid we converted
    our grocery store (when we expanded it) to star because my dad believed
    is was more efficient and cost less to operate if we kept the load
    pretty well balanced. I don't know if he was right or not. I'm just
    familiar with the practical applications. I was the one maintaining our refrigeration equipment by my mid teens.

    What got me is that most of the 208-230 labeled single phase motors are
    cheaper than the 230V labeled single phase motors. This makes no sense
    to me. 208-230V motors would need to be able to operate at slightly
    higher current which could theoretically mean marginally larger windings
    and/or better cooling. Why would they be priced lower? Why would
    anybody with 3 phase be running a single phase compressor anyway other
    than maybe as an emergency backup.

    Your typical single phase or more accurately split phase small shop or
    home shop in the US will have 230V(ish) from L1 to L2. My service runs
    about 234-236.


    --
    Bob La Londe
    CNC Molds N Stuff

    --
    This email has been checked for viruses by AVG antivirus software.
    www.avg.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Joe Gwinn@21:1/5 to All on Tue May 2 11:34:08 2023
    On Mon, 1 May 2023 18:54:41 -0700, Bob La Londe <none@none.com99>
    wrote:

    I am looking at motors right now and notice some are labeled 208-230 and
    some are labeled just 230.

    I do not need a lecture on the difference between star and delta. I am
    aware that tap to tap is 230(ish) on delta, and tap to tap is 208(ish)
    in star services. I've worked on both. When I was a kid we converted
    our grocery store (when we expanded it) to star because my dad believed
    is was more efficient and cost less to operate if we kept the load
    pretty well balanced. I don't know if he was right or not. I'm just >familiar with the practical applications. I was the one maintaining our >refrigeration equipment by my mid teens.

    What got me is that most of the 208-230 labeled single phase motors are >cheaper than the 230V labeled single phase motors. This makes no sense
    to me. 208-230V motors would need to be able to operate at slightly
    higher current which could theoretically mean marginally larger windings >and/or better cooling. Why would they be priced lower? Why would
    anybody with 3 phase be running a single phase compressor anyway other
    than maybe as an emergency backup.

    Your typical single phase or more accurately split phase small shop or
    home shop in the US will have 230V(ish) from L1 to L2. My service runs
    about 234-236.

    Probably determined by relative sales volumes.

    Joe Gwinn

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Clare Snyder@21:1/5 to All on Wed May 3 21:28:10 2023
    On Tue, 02 May 2023 11:34:08 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Mon, 1 May 2023 18:54:41 -0700, Bob La Londe <none@none.com99>
    wrote:

    I am looking at motors right now and notice some are labeled 208-230 and >>some are labeled just 230.

    I do not need a lecture on the difference between star and delta. I am >>aware that tap to tap is 230(ish) on delta, and tap to tap is 208(ish)
    in star services. I've worked on both. When I was a kid we converted
    our grocery store (when we expanded it) to star because my dad believed
    is was more efficient and cost less to operate if we kept the load
    pretty well balanced. I don't know if he was right or not. I'm just >>familiar with the practical applications. I was the one maintaining our >>refrigeration equipment by my mid teens.

    What got me is that most of the 208-230 labeled single phase motors are >>cheaper than the 230V labeled single phase motors. This makes no sense
    to me. 208-230V motors would need to be able to operate at slightly
    higher current which could theoretically mean marginally larger windings >>and/or better cooling. Why would they be priced lower? Why would
    anybody with 3 phase be running a single phase compressor anyway other
    than maybe as an emergency backup.

    Your typical single phase or more accurately split phase small shop or
    home shop in the US will have 230V(ish) from L1 to L2. My service runs >>about 234-236.

    Probably determined by relative sales volumes.

    Joe Gwinn
    My thoughts exactly. Also the 208/230 motor is likely a different
    manufacturer than the 230

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)