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Home / Download Center / Electrical Engineering Books and Technical Guides / Electrical engineering guides / Basic wiring for motor control – Technical data guide

Wiring diagrams

Wiring diagrams show the connections to the controller. Wiring diagrams, sometimes called “main” or “constructiondiagrams, show the actual connection points for the wires to the components and terminals of the controller.

Basic wiring for motor control - Technical data
Basic wiring for motor control – Technical data

They show the relative location of the components. They can be used as a guide when wiring the controller. Figure 1 is a typical wiring diagram for a three-phase magnetic motor starter.

Typical Wiring Diagram
Figure 1 – Typical Wiring Diagram

Line diagrams show circuits of the operation of the controller

Line diagrams, also called “schematic” or “elementarydiagrams, show the circuits which form the basic operation of the controller. They do not indicate the physical relationships of the various components in the controller. They are an ideal means for troubleshooting a circuit.

Figure 2 shows a typical line or schematic diagram.

Typical Line or Schematic Diagram
Figure 2 – Typical Line or Schematic Diagram

Standardized symbols make diagrams easier to read

Both line and wiring diagrams are a language of pictures. It is not difficult to learn the basic symbols. Once you do, you are able to read diagrams quickly, and can often understand a circuit at a glance. The more you work with both line and wiring diagrams, the better you will become in analyzing them.

The American Standards Association (ASA) and the National Electrical Manufacturers’ Association (NEMA) are the agencies which are responsible for setting up and maintaining the symbol standards.

Because of these standards, you will be able to read all diagrams that come across your workbench.

Title:Basic Wiring for Motor Contol – Technical Data // EATON
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Basic Wiring for Motor Contol
Basic Wiring for Motor Contol

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22 Comments


  1. Daniel Asare
    Jul 12, 2018

    Wow. Fantastic stuff here.


  2. Jim Curtis
    May 04, 2018

    Should have a fuse on control circuit and possibly show a transformer for control circuit in which more often than not one is used


  3. Daniel Amare
    Mar 09, 2018

    Really is the best college for practical knowledge base learning


  4. Christopher mwengwa
    Mar 07, 2018

    It is good keep it up


  5. siwema gama
    Mar 07, 2018

    thanks a lot, truly it’s helpful


  6. Devindraferreira
    Oct 15, 2017

    Thank you the information is very useful


  7. zaid nazik
    Aug 10, 2017

    i feel so appreciated for your efforts


  8. manoj sadh
    Jul 30, 2017

    thank you for this service its very useful for me


  9. Venkat
    Apr 12, 2017

    Good information


  10. Courage Agbenyeke
    Feb 10, 2017

    Thank you very much I really enjoyed it


  11. Muhammad imran shoukat
    Jan 29, 2017

    it is a good knowledge for learning.


  12. nelson laguna
    Mar 04, 2016

    I’ve known the control but the question is how do you actually connect the 3 wires coming from overload relayinto the connection box of the motor if it has 3 leads or 6 leads?

    Thanks..


    • Esteban Mariscal
      Apr 02, 2017

      Depending on your motors application (low or high voltage).
      In a 480vac application you’d wire the wires inside of the box 4-7 5-8 6-9… The 3 phases coming into the box from your overload would pair with wires 1,2,3 inside of the box.


    • Shafiq muavia
      Feb 27, 2018

      Best site for learning


  13. vivek pingal
    Jul 11, 2015

    thanks , its really help full for me . please help me to understand more circuits on panels


  14. Sandbhor Vishal
    Oct 11, 2013

    thank u very much


  15. PhP
    Oct 07, 2013

    Thank you so much!! This is helpful!! I am glad to be part of this site!!

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