The width of a standard light switch plate varies depending on the number of switches or outlets it is designed to cover, commonly referred to as "gangs." Therefore, there isn't a single exact width for "a light switch," but rather standard widths for the plates covering them based on the number of openings.
According to the reference provided, which details sizes for regular switchplates, the width is determined by the number of gangs. These dimensions are for the visible plate installed on the wall, covering the electrical box and the switch mechanism.
Standard Switch Plate Widths by Number of Gangs
The width measurement changes significantly based on how many switches are installed side-by-side in one box and covered by a single plate.
Here are the standard widths based on the number of gangs, as specified by the reference:
| Number of Gangs | Width (Fractions of an Inch) | Width (Decimal Inches) | Width (Millimeters) |
|---|---|---|---|
| One Gang | 2-3/4" | 2.75" | 69.9 mm |
| Two Gangs | 4-9/16" | 4.56" | 115.8 mm |
This table clearly shows that a plate covering two switches is significantly wider than one covering a single switch. Sizes for plates with more than two gangs would be progressively wider.
For context, the reference also provides other standard dimensions for these regular switchplates:
- Height: 4-1/2" (4.5" or 114.3 mm)
- Depth: 5/32" (0.16" or 4.0 mm)
These dimensions represent common sizes, although decorative or specialized plates may have slightly different measurements. The information is based on standard sizes as referenced from www.kyleswitchplates.com.
