Here is the start of my PID controller. Only thing missing is the controller, thermocouple and relay (ordered from Auberins.com but not yet delivered) Saw where the relay can get hot so I ordered it with a heat sink and decided to put in a small fan.( I have tons of computer "junk" laying around.) Will use this to control a 1250 w element. Fun little project so far, assuming nothing burns down. I went with 12 ga wire except for the plug coming in, it is 14 ga. I realize this is probably the weak link but shouldn't come close to pulling 15 amps. Fan and little green light work. So far so good. Plan is for the green light to be power on (it works) and the red light to be when the element circuit is on.