Originally Posted by aquenne
6" should be fine if you are mounting a standard 1/16 pid (like the aubers).
they are around 4" deep.
So just watch your component placement behind the pid (leave adequate spacing of a few inches for door swing) and you should be fine.
I got 3 auberins 1/16 PIDs, a contactor, 2 SSRs, DIN rail breakers, a safe start relay, 6 selector switches (some with double stacked contact blocks), and a 110 duplex receptacle in a 12x12x6.
I don't have a photo handy, but the basic gist of the layout is something like this. Divide into 3 rows. Top left, the power comes in. Remainder of the top is the SSRs and relays for the heating elements. Middle 3rd is the three PIDs. All of their wiring routes to the inside surface of the faceplate, then into the enclosure in 2 bundles (one for power wiring, one for the controls wiring). Bottom row has the breakers and DIN terminal blocks, switches on the faceplate, outlet mounted through the side.
Power to the elements is routed out the top right via a watertight conduit to a pair of boxes for the element plugs.