According to Table 314.16(A), what is the maximum number of 14 AWG THWN copper conductors in a four-inch by 1.5-inch octagonal box?

To determine the maximum number of 14 AWG THWN copper conductors that can fit in a four-inch by 1.5-inch octagonal box, it is essential to refer to Table 314.16(A) of the National Electrical Code (NEC). This table provides the conductor fill capacity for various box sizes based on the gauge of the conductors used.

A four-inch by 1.5-inch octagonal box has a specific cubic inch volume that allows for a certain number of conductors, which can differ depending on the conductor size and type. For 14 AWG copper conductors, the code specifies a maximum fill to ensure safety and functionality.

Looking at the calculations presented in Table 314.16(A), it is determined that a four-inch octagonal box can accommodate up to seven 14 AWG THWN copper conductors. This total accounts for the space required not only for the conductors themselves but also for any necessary wire insulation, ensuring that all conductors can fit securely and safely without risk of overheating or damage.

Therefore, the maximum number of 14 AWG THWN copper conductors suitable for a four-inch by 1.5-inch octagonal box is indeed seven, making it the correct answer