what size box to use

i need to know what size box to use .all the wire entering the box is 12 gauge.12-2 entering for the power,12-3 going to ceiling fan and 12-2 going to feed a receptacle

Reply to
dean9691
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Assuming no devices (this is a j box?)

7 current carrying conductors 1 for the grounds 8 total x 2.25" = 18cu/in box

if there are 2 clamps in the box add 4½ more inches.

Reply to
gfretwell

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