Factors that impact conductor sizing include not only conductor ampacity and equipment terminal temperature rating, but also the conductor insulation temperature rating. In this video we discuss Table 310.4(A) which provides information on conductor insulation properties such as letter type, maximum operating temperature, application, insulation, and outer cover properties.
This video is an extract from Mike Holt’s Electrical Calculations Training Library, based on the 2020 NEC. For more information about this product visit https://www.MikeHolt.com/examprep or call 888.632.2633.
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