On 11/21/2013 8:45 AM, Danny D'Amico wrote:
On Wed, 20 Nov 2013 19:58:37 -0600, Nightcrawler® wrote:

There is adequate space in your meter-main to add another neutral bus.

Then you have to figure out how to connect the second bus to the first one.


Is the general consensus that lug corrosion is what actually caused the
huge wires to overheat?

What would be other reasons? Or, is that the only reason a neutral would
overheat, when no other wire appears to be overheated?


What I remember is the set screw looked like it rusted. That suggests
that the screw is steel. Steel has a rather different expansion rate
than aluminum, and thermal cycling can cause a loose connection. Was the
lug rated for aluminum? Expansion rate is one of the problems with aluminum.

What were the instructions for installing the lug? Did the manufacturer
want the wire to be wire brushed and antioxide paste used?

Connections for large aluminum wires are generally reliable if the right
lugs are used.

Could be it wasn't tightened adequately.