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Difference Between NEMA and IEC Motor Starters & Contactors
Comparison Between NEMA and IEC Contactors, Controllers and Motor Starters Motor starters, controllers, and contactors are essential components used to control electric motors in industrial, commercial, and general electrical systems.…
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Part 14 – How to Size Star-Delta Starter for Motors?
Sizing a Star-Delta Starter with Contactors for a 3-Phase Motor A Star-Delta starter is used to reduce the inrush current when starting large three phase motors. The starting current of…
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Part 13 – How to Size DOL Starter for Three-Phase Motors?
Sizing Direct-On-Line Starter with Contactor, Fuse, Circuit Breaker and Overload Relay for 3-Phase Motors – NEC & IEC DOL Starter A DOL starter (also known as Direct-On-Line or across the…
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Part 12 – Sizing Motor Starter & Contactor – NEMA – NEC
How to Size a Motor Starter, Contactor and Controller? NEMA – NEC Motor starters and controllers are a combination of devices in a single unit to safely start, run and…
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Part 11 – Sizing Disconnecting Means for Motor & Controller
How to Size Disconnecting Switch, Fuse & Breaker for Motors and Controllers Disconnecting Means for Motors & Controllers Although we know that the motor disconnecting means can be sized based…
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Part 10 – Overcurrent Protection for Motor Control Circuits
How to Size Short Circuit and Overload Protective Devices for Motor Control Circuit Conductors? According to 430.75(A), motor control circuit must have a disconnect. If the motor control circuit conductors…
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Part 2 – NEC Requirements for Motor Circuits
General Requirements for the Design, Installation, and Protection of Motors, Motor Circuits, Controllers, and Disconnects – 2023 NEC Article 430 As discussed in part 1, motor circuits differ significantly from…
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Part 1 – Motor Load Circuits: NEC Terms and Terminologies
NEC Terms and Basic Terminologies Used in Motor Load Circuits Before designing an effective motor circuit that operates as expected based on analysis and calculations, it is important to understand…
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Why is the Ground Wire Size Smaller than the Hot Wire?
Why is the Size of the Ground Conductor Smaller than the Line Conductor? The ground wire does not always have to be the same size as the power (phase or…
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Ukraine to Unleash an Army of Robotic Dogs on the Battlefield
Ukraine to Deploy a Swarm of Robotic Dogs for the 1st Time on its Front Lines Ukraine is preparing for a technological breakthrough on the battlefield. For the first time,…
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