Nest Protect Adapter

thingiverse

While replacing a smoke detector with a new Nest Protect battery powered smoke detector, I discovered that the holes in the mounting plate don't align with the holes in the electrical box, prompting me to design this adapter in Fusion 360. Holes one and two line up perfectly with the holes in the Nest mounting plate, while holes one and three match up with the holes in the electrical box. This adapter is specifically designed for US electrical boxes that have a distance of 3.28 inches (83.3mm) between holes, but it might also work for Canada and Mexico. I printed this adapter using PETG, but you can use PLA or ABS instead. If it gets hot enough to deform, your house is likely on the verge of being severely damaged. If your electrical box is metal, the screws for holes one and three will require machine screws; otherwise, you can use the screws that came with the Nest. Installation: Insert a screw through hole one into the electrical box. I temporarily installed a screw in hole three to align the adapter; remove it now if you've done this. Next, install a screw through one of the holes in the mounting plate, then through hole three and into the electrical box. Finally, insert a screw through the mounting plate and into hole two of the adapter. You can now continue with the rest of the Nest installation instructions.