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E674
Motor Branch-Circuit Conductor Sizing

David A. Snyder, PE

This course describes how to properly size the power conductors and associated equipment grounding conductor (collectively called the motor branch-circuit) to be run from a motor starter (typically in a motor control center) to a single motor in an indoor or outdoor installation. This course also attempts to explain why there are usually differences between the myriad motor branch-circuit conductor sizing tables that are available. The calculations and limiting factors are explained so that the Reader can create their own motor cable schedules based on any ambient temperature and conductor insulation type.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.


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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

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