Motors

Everything you need to know about motors and motor controls, including selection, installation, operation, maintenance, performance, repair, and standards

Highlights

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EC&M Tech Talk Video — Code Requirements for Disconnecting Means

March 1, 2023
Randy Barnett reviews the many of the more requirements in the NEC, NFPA 79, and NFPA 70B in Episode 24.
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Motor

The Apprentice’s Intro Guide to Motors

Feb. 9, 2023
How to apply NEC Art. 430 for motors, motor circuits, and controllers in the field
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Technician With Air Handler Blower Motor Maintenance

NEC: Air Conditioning and Refrigerating Equipment — Part 3

Jan. 3, 2023
Article 440, Part 3 provides the requirements for the branch-circuit short-circuit and ground-fault protection used in HVAC and refrigeration equipment.
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Industrial Chiller Motor Maintenance

NEC: Air Conditioning and Refrigerating Equipment — Part 2

Dec. 6, 2022
Requirements for the disconnecting means of HVACR hermetic motors
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EC&M Asks Video — Can the Main Grounding Electrode Conductor Be Spliced?

Nov. 28, 2022
Randy Barnett answers reader-submitted questions regarding grounding and bonding topics.
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Technician With Air Handler Blower Motor Maintenance
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Questions Marks Electrical Troubleshooting Quiz Motors
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Motors At Factory Maintenance Repairs
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Motors In Manufacturing Plant Maintenance Repairs
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Motors At Factory Maintenace And Repair

NEC: Motors — Part 11

Oct. 4, 2022
Be aware of additional hazards with higher-voltage motors
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Water Pump Motors For Factory

NEC: Motors — Part 10

Sept. 20, 2022
Sizing conductors of adjustable-speed drive systems
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Motors In Industrial Plant Maintenance And Repair

NEC: Motors — Part 9

Sept. 6, 2022
A disconnect location depends on whether it is for the controller or the motor.
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Motors In Plant

NEC: Motors — Part 8

Aug. 16, 2022
The code requirements for motor control centers