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E270U
Simplified Short-Circuit Calculations (Audio Version)

Thomas Mason, P.E.

This course offers a simplified method of calculating available short-circuit current on a 480V commercial or industrial power distribution system. This calculation is required by the National Electric Code (2008 NEC 110.9, Interrupting Rating). It is also required by OSHA (CFR 1910.132) in order to prepare a detailed Arc-Flash warning label with j/sq-cm and personal protective equipment level.

The course is a set of look-up tables prepared with commercial electrical system modeling software and accompanied by coaching on how to use the tables correctly.

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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