Posted by Geo-TH,In on June 14, 2016 at 13:06:58 from (172.79.83.198):
In Reply to: 3 Phase Question posted by John M on June 14, 2016 at 05:49:59:
JohnM, Bad breakers and defective buss bars where breaker connects can cause heat and trip breakers.
One place with high ambient temperature, we had to blow cold air inside the box to keep from tripping breakers.
Bottom line both excessive temps and bad contacts where breaker connects to line and cause problems too. Not to mention excessive currents. I can't remember the exact amount but you don't push a breaker much past 80%.
Use an IR thermometer and look for a hot spot and measure current. geo
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