Currently within the cluster:
The cabinet doors are Acrylic sheets that are cut to size and then we drilled holes into them for the hinges, magnet mounts, etc.
The wood for the shelving is 1/4" thick particle board that is not treated/coated in any way. In the 3 years I have been working in the cluster, we have had zero issues with any kind of fire hazard.
Wiring and cables: We have one 12 outlet power strip per cabinet (running 11 machine) that we use for the power supplies of our Beagle Bone boards. The power and usb cables for the machines are bundled together, tied to the metal framing of the cabinets, and fed through a small gap between the center of two cabinets (back to back). Those plug directly into more power strips and network hubs that are mounted on the tops of the cabinets.
There are small heat sensors mounted inside the cabinets in different areas to monitor and track temperature levels, 24/7.
Currently, the cluster has it’s own HVAC system the takes air out of the cluster through an outside exhaust and a separate vent that continuously pulls fresh air in. There have been no issues with ABS fumes with our current system in place. However, we are starting to explore ideas for direct ventilation from the cabinets, for the future.
I hope I was able to answer all your questions and if you have any more, I’ll be happy to answer them to the best of my abilities.