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In this tutorial, we explain what a one-line diagram is, its advantages, and the information it contains. A single line diagram is one of the most widely used electrical tools due to its simplicity and usefulness. A one-line diagram (also known as a single-line diagram) is a simplified graphical representation of an electrical power distribution system. It … Read more
In this tutorial, we explain how to calculate the current of three-phase and single-phase motors. Power motor calculation. Learn to determine the amperage a motor consumes, which depends on the horsepower (HP), motor efficiency, power factor, and operating voltage. We recommend using an Excel file for various calculations, including motor calculations, available on the Hotmart … Read more
This article explains NEC electric motor protection, specifying where in the NEC the information is located so that any doubts can be addressed by reviewing each section in more detail. The National Electrical Code (NEC) establishes that electric motors must be protected against overload, short circuits, and ground faults. This is primarily addressed in Article 430, which covers … Read more
In this article, we explain the smallest conductor sizes of copper and aluminum conductors permitted by the National Electrical Code (NEC), depending on their applications, the current they carry, and specific restrictions that apply. This guide covers key aspects of conductor selection, including ampacity ratings and safety considerations, ensuring compliance with NEC standards. It is … Read more
The symbol for a fuse is one of the most widely used elements in electrical and electronic diagrams. Fuses are used in electronics with low voltages (a few volts), low-voltage systems (120/220V), and even in medium (over 13,000 V) and high-voltage (over 60,000 V) applications. In this article, we’ll show some of the most common … Read more
In this article, we explain the voltage drop calculation, one of the most crucial calculations in electrical engineering. Here, we outline the formula used to determine voltage drop, which is based on factors like operating voltage, wire gauge, conductor material, load distance, current (amperage), etc. We also include several exercises for calculating voltage drop. We … Read more
Understanding and Example of a One-Line Diagram for an Electrical Substation (PDF Download Available, in Spanish) This article explains what a one-line diagram is and provides an example of an electrical substation’s one-line diagram in PDF format for download and further analysis. The substation is a pole-mounted type featuring a 75 KVA transformer and a … Read more
This article presents the symbolism for electric motors. The electric motor symbol, in practice, there is a wide variety of electric motors, which means there are many symbols to represent them. You can use whichever you prefer; just remember to describe the symbol in the legend. Most symbols consist of a circle with the letter … Read more
In this article, we will calculate the appropriate fuse for a transformer. To do this, we only need to calculate the primary amperage and allow a certain margin to the fuse capacity to prevent it from blowing during startup surges. A fuse is designed to blow (open), which means it will disconnect the circuit when … Read more
The symbol of a fuse is one of the most commonly used elements in electrical and electronic diagrams. Fuses are used in electronics involving a few volts, as well as in low voltage (120/220V) circuits, and are even employed in medium voltage (over 13,000V) and high voltage (over 60,000V) systems. This article showcases some of … Read more