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PVC Single Gang Box 22 cu.in.

Extra capacity PVC single gang box for complex residential wiring.

22.5

cu.in. Volume

11

Max 14 AWG

10

Max 12 AWG

3" x 2-1/4" x 4-1/4"

Dimensions

Conductor Capacity per NEC 314.16

Maximum number of conductors that can fit in this 22.5 cu.in. box based on wire gauge (not accounting for devices, clamps, or grounds).

Wire GaugeVolume EachMax Conductors*
18 AWG1.5 cu.in.15
16 AWG1.75 cu.in.12
14 AWG2 cu.in.11
12 AWG2.25 cu.in.10
10 AWG2.5 cu.in.9
8 AWG3 cu.in.7
6 AWG5 cu.in.4

*Theoretical maximum for conductors only. Actual capacity will be less when including devices, clamps, and grounding conductors.

Common Applications

Multiple circuit residential
Kitchen circuits
Bathroom GFCIs

Calculate Box Fill for PVC Single Gang Box 22 cu.in.

Use our free calculator to verify your PVC Single Gang Box 22 cu.in. meets NEC 314.16 requirements.

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Similar Box Types

4" Square x 1-1/4" Deep

4" x 4" x 1-1/4" • 18 cu.in.

4" Square x 1-1/2" Deep

4" x 4" x 1-1/2" • 21 cu.in.

4" Square x 2-1/8" Deep

4" x 4" x 2-1/8" • 30.3 cu.in.

4-11/16" Square x 1-1/4" Deep

4-11/16" x 4-11/16" x 1-1/4" • 25.5 cu.in.

About the PVC Single Gang Box 22 cu.in.

The PVC Single Gang Box 22 cu.in. provides 22.5 cubic inches of volume for electrical connections. This pvc box is commonly used for multiple circuit residential, kitchen circuits, bathroom gfcis. With dimensions of 3" x 2-1/4" x 4-1/4", it offers adequate space for most residential and light commercial applications.

Box Fill Calculation Example

For a typical installation using 14 AWG conductors:

  • Box volume: 22.5 cu.in.
  • 14 AWG conductor volume: 2.00 cu.in. each
  • Maximum conductors (theoretical): 11

Remember to account for devices (2× conductor volume each), internal clamps (1× conductor volume), and equipment grounding conductors (1× conductor volume for all grounds combined).

Practical Example: Receptacle Installation

Installing a duplex receptacle with two 14/2 NM cables in this box:

  • 4 × 14 AWG conductors = 4 × 2.00 = 8.00 cu.in.
  • 2 × grounds (count as 1) = 1 × 2.00 = 2.00 cu.in.
  • Internal clamps = 1 × 2.00 = 2.00 cu.in.
  • 1 × receptacle = 2 × 2.00 = 4.00 cu.in.
  • Total: 16.00 cu.in.

Result: 16.00 cu.in. ≤ 22.5 cu.in. = COMPLIANT

Related Resources

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