So I was called because a bank of heat lamps melted down at the junction box above the lamps. This is a set of three hatco lamps, 120 volt, two with double elements and 1 single shorty one. From the looks of it, the connection at one of the neutrals melted down and took down the rest of what was in the box. So I fixed the wiring, fixed the breakers, and doubled up the neutral because the total amp draw of the 3 lamps is about 34 amps. So when all was said and done and I went to test it with the amp clamp on the double neutral. As I turned on the 5 elements one by one, the amp draw went up accordingly......except for the last one. With 4 elements running, I was at 29 amps, when I turned on the last one, instead of going up to 34 amps, it went DOWN to 25 amps! But all the elements were running! I tried a different meter, and the same reading happened. I talked to several other techs about it and they had never seen such a thing. Anyone?? Is one of them leaking to ground because electricity takes the shortest path??
Never saw anything like it.