Junction Box Angle PullConductors #4 AWG and larger
Where conductors size #4 AWG and larger enter a pull box on one side
and exit through an adjacent side, then there are two rules which apply to
determine the size of the box.
First, in any angle pull the distance from the side where the raceway with
conductors enters to the opposite wall must be at least six times the trade size
in inches of the raceway.
Second, the distance between raceways containing the same conductors must be
at least six times the trade size of the largest raceway.
These rules both apply to every box. Each calculation is made. Then the
largest dimension is used to select the box. This is one of the most overlooked
code rules. Although the box size determined by this method is NEC, most
electricians do not know about it. Skinned knuckles result when trying to
install large conductors in too small a box. Ten pounds in a five pound bag is
always a problem. Better to try ten pounds in a fifteen pound bag. Admittedly
some of the boxes sized in accordance with this article will seem huge, but code
is code.
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