Originally Posted by Arazcamaro
I just burnt both of my electric BK elements and need help figuring out what happened.
I just built a 8 gallon electric BK using two 1500 watt elements from Home Depot. I bought 14 gauge wire for each element that runs a receptacle that I fashioned onto a length of 10/3 wire that I already had (didn't use the red wire).
I installed a 30 amp / 125 volt plug on the 10/3 and plugged it in to a 30 amp outlet on the side of my house for RV hook-up. The kettle worked great for about a hour and then the top element burnt out (melted). I had a spare and put it in and within an hour it burned out along with the bottom element.
The outlet is working fine and I have no idea why these things are melting.
Just a WAG at this but it sure looks like you have 240V going to those heaters. If they are 120v heaters there is no way they could burn up like that if they are designed for 120 and your providing 120. The resistance of the heaters wouldn't allow the current to get high enough to destroy them (designed for 120).
If you hit them with 240V, you double their output and they pull current they are not designed for. 120V heaters are ROUGHLY 1/2 the resistance of a 240V heater.
Edit: You could burn up the heaters if you are providing them with 120 if they are not submerged.