Just a case, with a cover, some holes...
I needed a case for a static relay to commute lights for a recifal aquariums.
Before that I was using a power socket with embedded timer that was supposed to mecanically switch on and off the lights, but the high power LEDs were probacly demanding high currents, resulting in a spark beween the contacts for the switch, which would remain stuck. And often the lights would not go off, which can result in burning the corals.
A static relay is totally electronic, there is no mobile contacts, no spark.
Here is the design:
Here is the printed object with the relay (this one is not yet wired), with the hole for the low tension alimentation, one hole for power-in wire, and 2 holes for power out wires.
2,9mm scews are a perfect fit for the cover
And once wired:
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