In my apt., I have a 100 amp service, single phase, where the 3 main wires (2 hot, 1 neutral) running from the building into my panel are aluminum.
There are 6 breakers total, running horizontal, which is the max (2- 20 amp, 4- 15 amp).
The 20's are on the far left and right side of the row of 6 breakers.
The neutral bus runs horizontally on top of the 6 breakers.
One of the cables leading into the box contains a black, white and red wire, the rest just have the black and white.
From the cable that contains the black/white/red wire, the black connects to the far left 20amp breaker, and the red connects to the 15 amp breaker that is 4th from the left, while the white goes into the neutral bus.
The remaining breakers are connected simply black to breaker, whites to the neutral bus.
Thats the layout of this panel.
The problem I am having is that the main neutral wire is heating up to the point of melting the wire insulation (mostly at the lug and a bit more beyond it). This happens typically when I have the A/C on (a/c is on its own circuit), but have noticed it happening with other applicances on.
I have been told that I need a new panel, an 8/16.
I have been told that I need to balance the electrical load.
Looking for some insight on what the problem could be (besides the fact that the wire is aluminum-- all connections have already been tightened).
BTW- SquareD breakers.
Very old and small panel.
Thanks for you help.
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