Another PSU terminal cover
thingiverse
This terminal cover has holes in it for a DPDT on / off switch, a PC cable fused socket and a gland for the cable exit. Instructions When I first built my Reprap I was concerned about uncovered terminals on my 29A DC power supply. If I was going to have it running for 8+ hours at a time I wanted to have them covered. The holes for the M3 nuts are a little tight but a bit of work with a knife will allow them to be fitted and still keep them nice and snug.
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