Michigan residential appliance installer license prep class download the last version for apple3/21/2024 However, 99.9% of all other derating questions, multiply the correction factor. In order to increase the ampacity requirement of the wire, divide by 0.75 correction factor to increase the ampacity from 155 to 206 A. Step_2: Per Table 310.15(B)(1)(1) apply the temperature correction factor for 117 degrees F, calculate 155 A / 0.75 = 206.67 A.
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