# Difference Between Schematic Diagram And Wiring

By | September 26, 2023

## Difference Between Schematic Diagram And Wiring

A schematic diagram and a wiring diagram are two essential tools for electrical engineers and hobbyists alike. Both diagrams provide a visual representation of how electrical components are wired together, but they serve different purposes. A schematic diagram shows the _electrical_ connections between components, while a wiring diagram shows the _physical_ connections. This means that a schematic diagram is more abstract than a wiring diagram, as it does not show the actual size or shape of the components. Schematic diagrams are used to design and troubleshoot electrical circuits. They are also used to create bill of materials (BOMs) for electrical projects. Wiring diagrams, on the other hand, are used to physically wire a circuit together. They are also used to service and repair electrical circuits.

### Schematic Diagrams

Schematic diagrams are typically drawn using standard symbols to represent electrical components. These symbols are defined by the [IEEE Standard 91-2007](https://ieeexplore.ieee.org/document/4600967). The following is a list of some of the most common electrical symbols used in schematic diagrams: *

### Battery:

A battery is represented by two parallel lines with a plus sign (+) and a minus sign (-) in the middle. *

### Resistor:

A resistor is represented by a zigzag line. *

### Inductor:

An inductor is represented by a circle with a dot in the middle. *

### Capacitor:

A capacitor is represented by two parallel lines with a plus sign (+) and a minus sign (-) in the middle. *

### Transistor:

A transistor is represented by a triangle with a line through it. *

### IC:

An integrated circuit (IC) is represented by a rectangle with the company logo inside. Schematic diagrams can be used to represent both simple and complex electrical circuits. The following is an example of a simple schematic diagram for a light bulb circuit: This schematic diagram shows that the light bulb is connected in series with a battery and a switch. When the switch is closed, electricity flows from the battery through the light bulb and back to the battery. This causes the light bulb to light up.

### Wiring Diagrams

Wiring diagrams are more detailed than schematic diagrams. They show the actual size and shape of the electrical components, as well as the physical connections between them. Wiring diagrams are typically used to physically wire a circuit together. The following is an example of a wiring diagram for a light bulb circuit: This wiring diagram shows that the light bulb is connected to a power outlet. The power outlet is connected to a switch, which is connected to the light bulb. When the switch is turned on, electricity flows from the power outlet through the switch and into the light bulb. This causes the light bulb to light up.

### Differences Between Schematic Diagrams and Wiring Diagrams

The following table summarizes the key differences between schematic diagrams and wiring diagrams: | Feature | Schematic Diagram | Wiring Diagram | |---|---|---| | Purpose | To show the electrical connections between components | To show the physical connections between components | | Level of detail | Abstract | Detailed | | Usefulness | Design and troubleshooting | Physical wiring and servicing |

### Conclusion

Schematic diagrams and wiring diagrams are both essential tools for electrical engineers and hobbyists. They serve different purposes, but both are essential for understanding and working with electrical circuits.

* [IEEE Standard 91-2007](https://ieeexplore.ieee.org/document/4600967): The IEEE standard for electrical symbols * [SparkFun Learn: Light Bulb Circuit](https://learn.sparkfun.com/tutorials/light-bulb-circuit): A tutorial on how to build a light bulb circuit * [Electronics Tutorials: Wiring Diagrams](https://www.electronics-tutorials.ws/wp/circuits/wiring-diagrams.html): A tutorial on how to read and create wiring diagrams

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