As temp goes up wire resistance increases too, increasing heat, increasing resistance, etc - and I find breakers trip more easily at hotter temps too. /kc On Wed, Oct 11, 2017 at 01:08:33PM -0400, Zachary Winnerman said:
That's a good point, though if you are running your breakers that close I think you have bigger problems, as a power outage, however unlikely, could cause your equipment to not come back up at all. Software updates that reboot several servers in quick succession could also cause a breaker to trip under those circumstances. Unfortunately, there's no way to tell how close a breaker is to tripping without tripping it. Breakers may have amp meteres and a rated size, but the actual load before tripping is +-20% for common models, meaning a 20A breaker may trip as low as 16A.
-- Ken Chase - math@sizone.org Guelph Canada