Three Phase & Single Phase Motors
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Motors
Part 7 – Sizing Motor Branch Circuit Protection and OCPDs
How to Select OCPDs and Right Size Breaker / Fuse for Motor Overcurrent Protection? Sizing Branch Circuit Protection for Motors The sizing of overcurrent protection devices (OCPDs) for motor branch-circuit…
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Motors
Part 6 – Sizing Motor Feeder Conductors and Cables
How to Determine the Correct Wire Size for Feeder Supplying Multiple Motors? In previous sections on motor circuit calculations, we determined conductor sizing, overcurrent protection, and overload protection with solved…
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Motors
Part 5 – Sizing Motor Branch Circuit Conductors and Cables
How to Determine the Correct Wire Size for Motor Branch Circuit? Sizing Motor Branch Circuit Conductors Sizing the conductors for motor branch circuit is selected at 125% of the motor…
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Motors
Part 4 – Calculating Locked Rotor Current (LRC) for Motors
How to Determine the Value of Locked-Rotor Current (LRC) for Induction Motors? What is Locked-Rotor Current (LRC)? Locked-rotor current (LRC) is the maximum starting current drawn by an electric motor…
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Motors
Part 3 – Understanding NEMA Motor Nameplate Data and Marking
How to Read NEMA Motor Nameplates Data Printed on It for Motor Circuits? What is NEMA? NEMA (National Electrical Manufacturers Association) is a U.S.-based trade association that develops and publishes…
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Motors
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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Motors
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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Motors
How to Run a Three-Phase Induction Motor on a Single-Phase Power Supply?
Running a 3-Φ Induction Motor on a 1-Phase Supply – 3 Methods According to the type of AC power supply, induction motors are classified into two types; three-phase induction motor…
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Motors
Types of Electric Motors – Classification of AC, DC & Special Motors
Classification of Different Types of Electrical Motors An Electrical Motor is a machine that converts electrical energy into mechanical energy. It is used for generating torque to lift loads, move…
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Motors
Cable Size Calculation for LT & HT Motors
How to calculate the Cable size for LT & HT Motors? Selecting the right cable size for the motor is an important parameter for the Industry whether it’s during Installation…
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