What is the ampacity of four 14-2 NM cables routed through wood framing filled with caulk?

To determine the ampacity of four 14-2 NM cables routed through wood framing filled with caulk, it is essential to consider the National Electrical Code (NEC) guidelines and the characteristics of the cable being used.

For 14 AWG conductors, the standard ampacity is typically 15 amperes when grouped together in a typical installation scenario. However, it’s crucial to account for derating factors when multiple cables are installed close together, as seen with the use of four NM cables. According to NEC regulations, when three or more conductors are grouped, the allowable ampacity must be adjusted to avoid overheating.

In this case, four conductors would require applying a derating factor. Generally, when more than three conductors are in a raceway or cable assembly and not exposed to cooling air (as they are insulated and enclosed in caulk), their ampacity must be reduced. The NEC specifies these derating factors to ensure safety and reliability.

Despite this adjustment, typical installations of 14 AWG cable, where you have four cables grouped as described, would still result in a standard rating of 15 amps after accounting for derating adequately. Given that the choices included, 15 Amps becomes the most applicable answer based