A metal device box contains one fixture stud two internal cable clamps and two grounding conductors spliced together. To allow for these fittings and conductors a maximum number of conductors allowed in the box by the NEC tables must be reduced by:

A metal device box contains one fixture stud two internal cable clamps and two grounding conductors spliced together. To allow for these fittings and conductors a maximum number of conductors allowed in the box by the NEC tables must be reduced by:

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