Dimensions of a 22-position recessed electrical box

A 22-position recessed electrical box is typically a large multi-gang box, with dimensions depending on manufacturer and depth, often exceeding 6 feet in width for wall-mounted configurations.

General Sizing Principles

Electrical boxes are sized according to the number of device positions (gangs) they accommodate. A 22-position box is considered a very large multi-gang box, often used in commercial or industrial applications for multiple switches, outlets, or control devices. Standard multi-gang boxes scale linearly: each gang typically occupies about 2 inches in width and 3–4 inches in height, with depth varying from 3.5 to 4 inches or more depending on wire fill requirements and recessed mounting .

Estimated Dimensions

For a 22-gang recessed box:

• Width: Approximately 44–48 inches (22 gangs × ~2 inches per gang, plus spacing and wall thickness)
• Height: Typically 3–4 inches per row; if arranged in a single row, height may be around 4 inches; multiple rows increase height proportionally
• Depth: Standard recessed depths range from 3.5 to 4.5 inches for residential/commercial boxes; deeper boxes may be required for high wire counts or conduit entry
• Internal Volume: Must comply with NEC wire-fill guidelines; larger boxes provide sufficient space for conductor splicing and cover installation

Considerations for Recessed Installation

• Wall Thickness: Ensure the box depth accommodates the wall cavity and allows flush mounting of the cover
• Wire Fill: A 22-position box will require careful planning to avoid overcrowding; deeper boxes or multiple rows may be necessary
• Manufacturer Variations: Exact dimensions vary by brand; always consult the technical drawing or datasheet before ordering
• Custom Options: For very large multi-gang recessed boxes, manufacturers often provide custom enclosures to meet specific layout and wiring requirements

Summary

While there is no universal standard for a 22-position recessed electrical box, expect a width of roughly 44–48 inches, a height of 4 inches or more depending on row configuration, and a depth of 3.5–4.5 inches or greater. Always verify with the manufacturer's specifications to ensure compliance with wiring codes and installation requirements .