Mike Holt's 2017 NEC Code Graphic and Question of the Day

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NEC® Code Quiz Question of the Day

Where more than two Type NM cables are installed through the same opening in wood framing that is to be sealed with thermal insulation, caulk, or sealing foam, the allowable ampacity of each conductor shall be _____.

(a) no more than 20A

(b) adjusted in accordance with Table 310.15(B)(3)(a)

(c) limited to 30A

(d) calculated by an engineer