Yet another electronics junction box

Fully customizable wall top / in wall box for whatever you need. When mains are inside and most of materials are flammable, use it in / on non flammable wall and surrounding. Typically concrete basement far from wood etc. Or choose non flammable / self extinguishing material.
Fine customization such as mounting holes or openings do in code by [un]comment particular parts.
Print lid upside down.