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IEC Motor Data Calculator - Schneider Electric
IEC Motor Data Calculator – Schneider Electric

Three Phase and Single Phase Motor

IEC Motor Data Calculator is based on the NEC 2011.

For three-phase motor according to inputs (Voltage and Horse Power) and TeSys U Self-Protected Starters selection table following motor data is calculated:

  1. Full Load Amps (FLA)
  2. Wire Size
  3. Time-Delay Fuse Rating (Amps)
  4. PowerPact MCP Size (Amps)
  5. IEC Contactor Cat #
  6. IEC Overload Relay Cat #

For single-phase motor input is Horse Power and following information is calculated for both voltages 115V and 230V:

  1. Full Load Amps (FLA)
  2. Wire Size
  3. Time-Delay Fuse Rating (Amps)
  4. PowerPact Breaker Size (Amps)
  5. IEC Contactor Cat #
  6. IEC Overload Relay Cat #

Wire and Conduit Data

Wire Size AWG/kcmil selection is based on Appendix C – Tables C1 and C1A for copper and alluminium.

Ampacity of conductors based on 30 C ambient. Conduit sizes for aluminum based on the use of compact conductors. Where a major portion of the load consists of nonlinear loads, the neutral is considered to be current carrying.

On 4-wire applications, derate the ampacity to 80% per note 8 and note 10© of the NEC ampacity tables.

Software:IEC Motor Data Calculator – Schneider Electric
Developer:Schneider Electric
Size:101 KB
Download:Right here | Video Courses | Membership | Download Updates
IEC Motor Data Calculator
IEC Motor Data Calculator

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More Information


  1. raj
    Oct 21, 2022


  2. policarpio.jb
    Nov 27, 2018

    These are NEC, ANSI motors? Title of this seems misleading and I am looking for IEC motors.

  3. saman
    May 30, 2014

    power engineer and control system

  4. atanu.dasgupta
    Jul 20, 2013

    For unprotected sheet, the file is asking for a password. Can you please let me know the password??

    • Edvard
      Jul 20, 2013

      Almost all spreadsheets are free to download and use, but not for modification. Some of them, developed by mr. Jignesh Parmar can be purchased.

    Jun 16, 2013

    Your site is vey useful. I like it.

  6. Mohammed Bajubair
    May 27, 2013

    is it necessary to sign up in the box website, because every time I click on Download there is no response and when I try to register in box website there is an error tells me that the page expired, could please help me.

  7. Kamyar
    May 27, 2013

    hi how can download this software ?
    i dont now
    please help me

    • Edvard
      May 27, 2013

      You must register Kamyar, follow the ‘Register’ link at the top-right of portal.

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