×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Nominal voltage

Nominal voltage

Nominal voltage

(OP)
I understand that nominal voltage means that it can vary depending on system, supply source etc. My question is why is there such a variation in THE stated nominal voltage ? In other words, why does one appliance say 110 volts and another reference say 115, and another say 120 in another thread mentioned 125 ? What is the history or reason here ?
Thanks
Pete

RE: Nominal voltage


For the US, there are ~35 Nominal System Voltages, where each has generally six limits, termed Maximum Utilization and Service Voltage (two ranges) / Minimum Service Voltage (two ranges) / Minimum Utilization Voltage (two ranges)/

Suggest obtaining the standard and reviewing the entire text—including the document Foreword for historical evolution.  There are a lot of details, making it difficult and impractical to adequately explain here.
  

RE: Nominal voltage


Aside—Its title is ANSI Standard C84.1-1995 [reaffirmed 2001] ELECTRIC POWER SYSTEMS AND EQUIPMENT - VOLTAGE RATINGS (60 Hz) and available through sites like ANSI.org or global.ihs.com.  {It is not an IEEE publication}
  

RE: Nominal voltage

(OP)
Thanks Mr Busbar,
That standard had everything I needed. Thanks for the quick responce too.
Pete

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources