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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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21 Comments


  1. graham banda
    Dec 05, 2020

    domestic wiring and motor control


  2. Heri
    Sep 27, 2020

    Hay bos, thanks to this articles, btw can i reshare this with my language?


  3. Johnny
    Jan 04, 2019

    Knowledge of basic single- and three phase electrical systems including basic AC and DC motor control and safety measures on electrical equipment.


  4. Joseph
    Nov 02, 2018

    Really helpful

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