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Licensed Electrical Cont.
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There is NO "standard" size. Exactly what box are you using.

WHY are you using #10, and why are there so many?
 

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A "Handy Husband"
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14,118 Posts
using 10 gauge for a run of 350 ft. with 5 receptacles. Using a carlon fs box E979DFN.
That box is not large enough, it is 19 Cu in.

For 9 #6 you need a minimum of 22.5 cu in plus 5 cu in more if the box has a receptacle.
 

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35 Posts
Discussion Starter · #7 ·
So, is this correct for box fill calculations?

Each 10 ga wire counts as one or 2.5 cubic inches
Multiple ground wires only count as one or 2.5 cubic inches
Each single outlet counts as two or 5.0 cubic inches
 
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