Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

World Indusrial Voltages

What voltage and frequency will I find in "some other" country? by jraef
Posted: 15 Oct 05

A frequent question in this forum and others is, what is the "standard" voltage in one country or another. This FAQ will attempt to collect this information in one place. Since there are many easy to find websites showing residential voltages, this will be primarily for industrial voltages. If there is enough demand (and time) in the future, I may add residential as well.

This is meant to be a collaborative effort of many members, and requires input of anything that you don't see here, or correction if you see a glaring error. Keep in mind however; just because you have not seen something in your country does not mean it does not exist, someone else may have contributed it. I will not challenge any input up front, but if a preponderance of evidence shows me that someone's suggestion was in error, I will edit it accordingly. As the originator, I will be the only one able to edit, but I am not a benevolent dictator, just a facilitator. To send a comment for inclusion or modification, use the link at the end of this FAQ to "Send a comment to the author". I will take care of formatting.
Remember, this is always a work in progress.

3 phase Low Voltage
USA: All 60Hz
    Official / Common: (quasi-official, it can vary from one utility to another)
  • 480Y277*
  • 480 delta*
  • 240/120 4wire center tap ("red leg") delta*
  • 208Y120*
  • 240 delta
    Defacto / Legacy:
  • 600V delta (isolated areas)
  • 480V corner gounded delta
  • 440 delta
  • 200Y115
  • 240 open delta
  • 240 corner grounded delta
3 phase Medium Voltage
USA: All 60Hz
    Official / Common: (quasi-official, it can vary from one utility to another)
  • 34500Y/19920*
  • 24940Y/14400*
  • 13,800 delta*
  • 12,470Y7200*
  • 13,200Y7620*
  • 4160V delta*
  • 4160Y2400
  • 2400V delta
    Defacto / Legacy:
  • 34500 delta
  • 23000 delta
  • 22860/13200
  • 20780Y/1200
  • 8320Y/4800
  • 6900 delta
  • 4800 delta
*Recommended system voltages per ANSI, C84.1

Back to Electric power & transmission & distribution FAQ Index
Back to Electric power & transmission & distribution Forum

My Archive


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close