The device attaches to the neutral buss bars in the electrtical panel. It captures unused current from the neutral buss bars and cuts down on the kw demand. I wanted to see if it was a code violation to place it inside of the electrical panel. We all have our views on certain subjects I wanted to read in the NEC or from a panel manufacturer what they had to say on this subjuct. It's over 40 panel makers and I would think the NEC would touch on the subject. In some cases it is much easier to place the device inside the panel I just want to do what the code suggest. Thanks for all the positive input on this subject. I'm not here to debate on the function of the device we can take that up at some other time. Thanks Carlos