Plastic terminal boxes use ABS plastic, a wireless-transparent material that helps minimize the signal blocking or interference associated with metal enclosures, so routers and other wireless equipment can operate inside the box. Mounting options and cable knockouts help position equipment and manage connections while keeping the installation organized.

Compare the number and placement of knockouts, including top, bottom, and end openings, along with compatibility with electrical boxes and access for power or cable entry. Also review mounting points, rear tracks or grids, depth-alignment features, trim rings, and space for shelves or platforms to match the enclosure to the equipment and installation method.

Choose a plastic terminal box by comparing the equipment’s footprint and depth with the enclosure’s usable space, while allowing room for cable routing, power access, ventilation, and mounting hardware. Select a larger enclosure when installing multiple devices, shelves, or power components, or when you expect future expansion beyond a single router, modem, or switch.

When integrating plastic terminal boxes with electrical boxes, review the available top, bottom, and end knockouts, confirm the box type and cable path, and account for the wall depth during installation. For shelves or mounting accessories, verify the enclosure size and mounting locations, allow room for routers, modems, switches, or power devices, and plan cable management before securing the accessories.