tonype
Senior Member
- Location
- New Jersey
Discoloration of busbar components
- Thread starter tonype
- Start date
- Status
ptonsparky
Tom
- Occupation
- EC - retired
Exposure to dust contamination during construction. Sheet rock dust on cheap bus alloys.
I don't like the discoloration of the top lug going to the 215 cb. Do a FOP test on that one. Looks like heat.
Corrosive atmosphere will do it as well.
ptonsparky
Tom
- Occupation
- EC - retired
Looks like you have multiple brands of CBs in there as well. What panel is it?
tonype
Senior Member
- Location
- New Jersey
Bad breaker to bus connection at the top at some point in the past- that definitely has overheated. Agree with ptonsparky about the likely hood dust/corrosion on the other places and there is one of those breakers ( the 15 in the middle on the left) that appears to be a different brand.
At the very least those affected spaces especially that top should be blanked off and marked unusable. The references applcable here are
110.12(B)-Integrity of electrical equipment and connections as far as damaged bus and 110.3(B) Installation and use- for any breakers not being listed for use with that panel .
There are only 2 brands shown bottom one is GE, middle one is a old style GE (1960's?) & the 15A 2 pole is a ITE or Siemens depending on the age.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Seems a little odd that the vertical section of bus is clean and so is one of the horizontal segments. The top one is definitely the worst, and at first glance one might expect a weak breaker to bus connection caused it, but then why similar though not as bad on the others, with clean vertical bus tying them together?
I think contaminants may be at work here more so then bad connections, exception may be the top pole.
I think contaminants may be at work here more so then bad connections, exception may be the top pole.
- Status