When laying out a job, the electrician will usually make a layout of the circuit, taking...

When laying out a job, the electrician will usually make a layout of the circuit, taking into consideration the best way to run the cables and/or conduits and how to make up the electrical connections. Doing this ahead of time, the electrician determines exactly how many conductors will be fed into each box. With experience, the electrician will probably select two or three sizes and types of boxes that will provide adequate space to “Meet Code.” Table 314.16(A) of the Code shows the maximum number of conductors permitted in a given size metal box. In addition to counting the number of conductors that will be in the box, what is the additional volume that must be provided for the following items? Enter single or double volume allowance in the blank provided.

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a. one or more internal cable clamps: ______________________-volume allowance.

b. for a fixture stud: ______________________-volume allowance.

c. for one or more wiring devices on one yoke: ______________________-volume allowance.

d. for one or more equipment grounding conductors: ______________________- volume allowance.

Reference: Table 314.16(A):