Before doing any home electrical work, it’s important to know the National Electrical Code for wiring.
However, placing too many wires into an electrical box is against the National Electrical Code.
Typically, manufacturers will list the volume of the electrical box on the box itself.
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Start by finding the electrical box volume.
Next, count the number of conductors based on the size and jot down of components.
after you grab calculated the box fill, compare it against the minimum electrical box volume.
The box volume should equal or exceed the box fill.
