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In box fill, how do all of the equipment grounding conductors in a box count?

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  1. One volume for each EGC
  2. As a single conductor volume in total
  3. They do not count at all

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References

  1. EC&M: NEC Requirements for Sizing Outlet Boxes www.ecmweb.com/code-basics/nec-requirements-sizing-outlet-boxes Checked 2026-10-10.

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