Junction Box Angle Pull

Conductors #4 AWG and larger

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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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