box fill ques ?

[wireman1]

when calculating box fill does each switch and receptable count as 2 wires or only the dimming switches and gfi receptables which are a lot bigger and broader and would require a lot more room inside the box .is there a chart for this or just the explation in the code book.

 

[busman]

Each yoke counts as two allowances for the largest conductor connected to the device on that yoke. The exception is large devices (think range and dryer receptacles that need a two-gang box) that count at 2 yokes (four allowances).

Mark