Most Important Electrical Symbols and Diagrams


If you are an electrical engineering student, teacher, or professional, then you must know the most important and basic electrical symbols everywhere used. You must know the symbols of electrical components, machines, circuits, connections. Otherwise, you can not able to read any electrical drawings, wiring diagrams, circuit diagrams, connection procedure manuals, etc. Here, we have given some important symbols related to electrical engineering. These are very basic and important symbols and are used everywhere such as electrical drawings, wiring diagrams, circuit diagrams, etc. So, remember these symbols forever.


Here the list of electrical symbols you must know,
  • Electrical Wire, Line, or Conductor
  • Resistor
  • Inductor
  • Capacitor
  • Electric Motor
  • Electric Transformer
  • Switch
  • Fuse
  • Circuit Breaker

Other important symbols are given below.

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Most Important Electrical Symbols and Diagrams, Electrical engineering symbols




Symbol of Electrical Wire or Line

electric wire or line symbol



Generally, the Electrical line or wire is symbolized by a simple single straight line. It is very important to know.



Symbol of Resistor in Electrical

resistor symbol


The resistor is a passive component used in almost all electrical and electronic circuits. So you must know the Resistor Symbol. It helps you to find out where the resistor is connected in a circuit. The main function of a resistor is to oppose the flow of electric current. There are various types of resistor available, but you must know the common one which used everywhere.


Symbol of Inductor

inductor symbol



The inductor is also a passive component. It is made by a coil of wire. The main function of an inductor is to oppose the changes in current flowing through it. Generally, the inductor is not so effective for DC supply but it is more effective for AC Supply. So, you must know the basic inductor symbol used everywhere.


Symbol of Capacitor

capacitor symbol



The Capacitor is also a passive element or component. The main function of a capacitor is to store the electrical energy in form of an electric charge. The use of capacitors is everywhere in electrical or electronic circuits for filtering, power factor correction, energy storing, etc. There are various types of capacitors available. But you must know the basic capacitor symbol first and remember it forever.





Symbol of Electrical Grounding

electrical grounding symbol



Grounding is a very important safety measure in electrical engineering. You must know the electrical grounding symbol and should not be forgotten. This helps you to find out if electrical equipment or system is electrically grounded or not by seeing its diagram only.


Symbol of Fuse

Electric Fuse Symbol



Fuse also a very important electrical safety or protective device. There are different types of fuse available and they are categorized by voltage level, safety level, etc. Anyway, you should know the basic fuse symbol used everywhere.





Symbol of Switch

Switch Symbol



The switch is an arrangement by which we can start or stop the flow of electrical current. There are various types of mechanical, electrical, electromechanical, and electronic switch are there. Here the symbol of a simple switch is given.


Symbol of Relay

Relay Symbol



Relay is an electrically operated electromechanical or electronic device. Relay is also used in so many electrical and electronic control circuits. There are so many types of relays are available. But you must know the symbol of a simple relay.





Symbol of Electrical Motor

electrical motor symbol



Electric Motor is a machine that converts electrical energy into mechanical energy. The applications of electric motors are everywhere from domestic to industrial, traveling, etc. So, you must know the symbol of the electric motor.



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Most Important Electrical Symbols and Diagrams Most Important Electrical Symbols and Diagrams Reviewed by Author on 7/14/2021 Rating: 5
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