Box Selector

NEC 2020

Enter your fill — see which boxes from Table 314.16(A) legally fit.

Fill

§314.16(B)

Conductors

2.00 in³ ea.

2.25 in³ ea.

Pigtails under 6" that don't leave the box are not counted per NEC 314.16(B)(1).

Other Fill — §314.16(B)

Device yokes

Gang count

Internal clamps

Support fittings

EGCs

Ring / Extension — §314.16(A)

Ring volume

in³

Volume marked on plaster ring or extension ring.