"Limp Arbor" wrote in message
...
Do I have this right?

Three 12/2 NM cables going into a plastic box with an outlet

conductors 6
grounds 1
Oulet 3

Total 10
10 times 2.25 = 22.5 cubic inch box needed.


Wayne gave you the math. Personally I just read the numbers printed on the
boxes. For the last 20 years or more they tell you right on the box how
many and what size wire. Actually I think it is stamped inside the box.

Pigtails that start and end in the box do not count.

I recall from memory that a standard switch box can only handle 2-3 wire
cables. I think the deeper box can handle 3.


--
Colbyt
Please come visit http://www.househomerepair.com