I have a project where I will be putting a 180W PSU (80+) and a bunch of N-Channel TO-220 MOSFETS, a few PWM PCBs, and an ESP8266-based controller in a wall cavity for a ≤150W LED lighting system.
If I don't want to PCB-mount the MOSFETs (since this is a one-time design and I'd love to get good heatsinking for the FETs), what material/bar/whatever should I mount them to? Since IIRC I can't mount all to a metal strip since that'd be shorting them all together on their ground side.
This is a new space with decent room in the cavity (≥ 2m^3), so waste heat can go in there, so is there a project box that's OK to receive 110VAC, output lots of 12VDC, and not give an inspector fits?
I'm comfortable with conventional 110V wiring (outlets, switches, fixtures, etc) and I'm comfortable with wiring up ≤10W PCB-based systems (like ESP8266 work), but this combo of house voltage and (marginally) higher wattage is a bit out of my comfort zone and I want to do it safely.
I'm OK with (indeed would prefer) an access panel through the drywall, but would want any fans out the back if possible because of noise. Preferably fans that are heat-activated.
I have a 3d printer and could print something, but I suspect melty thermoplastics are no bueno in this case.
Thanks in advance!