Universal Electrical Box Spacer - Outlet and Switch Leveling Aid (parametric)

Introduction

This 3D-printable spacer is designed to solve common issues with recessed or loose electrical outlets and switches. It fits between the device (outlet or switch) and the electrical box, ensuring a secure, flush installation.

Key features

• Universal fit for US and US-compatible electrical boxes
• Prevents sunken outlets and switches
• Improves device stability
• Easy to install

Perfect for both professional electricians and DIY enthusiasts, this spacer helps achieve a clean, professional-looking finish in electrical installations. Use it to:

• Level misaligned outlets or switches
• Provide additional support for devices
• Compensate for shallow electrical boxes
• Ensure a tight fit against wall surfaces

Compatible with standard US electrical boxes and devices, including single-gang and multi-gang configurations.

Usage

Simple

Download one of the pre-made STLs. They are 3.2mm (~ 1/8" thick). Print multiples and stack them as needed, or scale on the Z-axis with your slicer (every 100% scaling on the Z-axis will add 3.2mm (~1/8') to the thickness of the spacer.

Advanced (Parametric)

Open the model in OpenSCAD and adjust the following parameters as needed:

numberOfGangs specifies the number of slots in the electrical box (should select ≥ 1 to as many as your printer and/or wall box support!)

spacerThickness specifies the thickness of the spacer in millimeters

For example,

numberOfGangs = 3;

spacerThickness = 15;

will build a 15mm thick spacer for a 3-gang electrical box.