Basic Wiring for Motor Control - Technical Data
Basic Wiring for Motor Control – Technical Data (photo by

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.

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
Size:946 KB
Download:Right here | Get Download Updates | Get Technical articles
Basic Wiring for Motor Contol
Basic Wiring for Motor Contol

Shape Up Your Knowledge //

Want to be a better electrical engineer? Subscribe to professional technical articles. Sharpen up your knowledge in field of electrical engineering now!

Subscribe Now

Page edited by E.C. (Google).


  1. 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?


  2. vivek pingal
    Jul 11, 2015

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

  3. Sandbhor Vishal
    Oct 11, 2013

    thank u very much

  4. PhP
    Oct 07, 2013

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

Leave a Comment

Tell us what you're thinking... we care about your opinion!