Quick Answer
To measure for a 4G light switch plate, first measure the width and height of the drywall opening, then check the distance between screw holes. For a standard 4-gang box, the opening is typically about 4.5 inches wide and 4.1 inches tall, but always measure your specific box. Use a tape measure and record dimensions to the nearest 1/16 inch.
What You'll Need
Before you start, gather a tape measure (preferably with 1/16-inch increments), a pencil, and a piece of paper or a phone to record measurements. A spirit level is optional but helpful if you want to check that the box is square.
Understanding 4-Gang Switch Plate Dimensions
A 4-gang switch plate is designed to cover a four-gang electrical box. The plate itself is larger than the opening, typically around 5.5 inches wide and 4.5 inches tall, but the critical dimensions are the drywall opening and the screw hole spacing. Standard screw spacing for a 4-gang box is about 3.5 inches horizontally between the outer screws, but this can vary by box brand and type.
How to Measure for a 4G Light Switch Plate: Step by Step
- Measure the Drywall Opening Width: Use your tape measure to measure the horizontal distance across the drywall cutout from left to right. Measure at the top, middle, and bottom of the opening. Record the smallest measurement. Common mistake: measuring only at one point. The opening may be uneven, so use the smallest width to ensure the plate covers the gap.
- Measure the Drywall Opening Height: Measure the vertical distance from the top edge to the bottom edge of the drywall opening. Again, take measurements at the left, center, and right sides. Record the smallest height. Checkpoint: If the opening is not square, the plate may not sit flush. Use the smallest height to avoid gaps.
- Measure Screw Hole Spacing: Measure the distance between the center of the top screw hole and the center of the bottom screw hole on one side. Then measure the horizontal distance between the left and right screw holes. Record both dimensions. Common mistake: assuming screw spacing is standard. Always measure your specific box, as spacing can vary.
- Check the Box Depth: Measure how deep the electrical box is from the front edge to the back. This ensures you have enough room for the switch modules and wiring without the plate bowing. Checkpoint: If the box is too shallow, you may need a box extender or a different switch module. Standard depth is 1.5 inches, but verify.
- Verify the Plate Size: Compare your recorded measurements to the plate specifications. The plate should be at least 1/4 inch wider and taller than the drywall opening on each side to cover any rough edges. For a 4G plate, typical overall dimensions are about 5.5 x 4.5 inches. Final step: If your opening is larger than the plate, you may need a larger plate or a mud ring to adjust the box.
Product Facts
- 4G Light Switch Plate - Brass: The 4G Light Switch Plate in Brass provides a polished, timeless backdrop for up to four switch modules, letting you tailor the look and function of your space. Warm brass finish adds classic elegance to any room. Durable stainless‑steel construction ensures long‑lasting performance. Four‑gang (4G) layout accommodates four separate switches or outlets. Designed to work with Plank Hardware’s interchangeable switch… When you measure for a 4G switch plate, you want a plate that not only fits the box but also complements your decor. The brass finish and stainless-steel construction of this plate offer durability and a classic look that works in many interiors.
