I've tried searching for this, but haven't found anything that definitively (for me, at least) answers the question.
I'm planning on using a 12" x 12" x 6" plastic junction box
. I've got 2 40A SSR's and heatsinks from Auber, which will send power to each leg of a 4500W ULWD element. This element will be used in a combination MLT/BK, for mash heating and boiling.
The SSR's will reside in the control box with a row of 5 DIN-rail circuit breakers (one a double pole), a row of DIN-rail terminal blocks, and the back side of an Auber PID, 5 SPST switches, a 220V outlet, and 4 110V outlets.
I understand that putting the heatsinks on the outside of the box (by mounting the SSR's and heat sinks to opposite sides of an aluminum plate with silicone grease, which is mounted in a hole in the plastic box) is the technically ideal method. However, I'd really like to keep everything within the box itself, mostly due to space concerns (and, to a lesser extent, aesthetics).
Any and all suggestions are welcome. Thanks!