Main breaker is overheating and tripping. checked connections and slight discoloration at power connection from street. appears to be overheating internally. I am a mechanical contractor by trade and would like to replace as I have seen this happen with subcircuit breakers. recommendations?
I would take an ampere reading first, looking for balance and load. If the load is not balanced, correct it. If the load is balanced and is less than eighty percent of the rating of the equipment, I would check the lugs for tightness, and if the load is over eighty percent of the equipment rating, then I'd be afraid tightening may strip the lux threads and would have to replace the load center with the next size but with current existing protection ratings or value.
Heat softens metal and can loose tightness. Retoghtening the softened metals can strip the threads. I offer the consequences as well as my services to complete the equipment servicing.
Pull the meter and tighten screws on main breaker
http://waterheatertimer.org/See-inside-main-breaker-box.html
http://waterheatertimer.org/How-to-replace-circuit-breaker.html
SOURCE: Siemens Main Breaker 125 Amp gets warm and trips
sounds like a loose connection ,or possibly a weak main breaker.
SOURCE: I have a Siemens model
you will have to get the branch breaker and a breaker holder kit to do this these breakers are not convertable
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