Which NEC section addresses a situation where a box selected to meet minimum volume may be too small for device installation?

Which NEC section addresses a situation where a box selected to meet minimum volume may be too small for device installation?

• A. Section 314.24
• B. Nothing
• C. Section 314.19
• D. Section 406.2

Answer: (A)

Box fill isn’t just about meeting a minimum for how many wires need to fit; a device itself also takes space in the box. Sometimes a box chosen to meet the minimum volume for conductors ends up being too small once the device (its yoke, screws, and internal connections) is installed. Section 314.24 specifically addresses this situation, guiding you to upsize the box or choose a different type so there’s enough cubic inches to comfortably and safely install the device. The other sections cover related topics like general box fill calculations or receptacle/switch requirements, but they don’t address this particular scenario of a device not fitting in a box sized only for minimum conductor fill.

Box fill isn’t just about meeting a minimum for how many wires need to fit; a device itself also takes space in the box. Sometimes a box chosen to meet the minimum volume for conductors ends up being too small once the device (its yoke, screws, and internal connections) is installed. Section 314.24 specifically addresses this situation, guiding you to upsize the box or choose a different type so there’s enough cubic inches to comfortably and safely install the device. The other sections cover related topics like general box fill calculations or receptacle/switch requirements, but they don’t address this particular scenario of a device not fitting in a box sized only for minimum conductor fill.