I have four story office building, being serviced by a 1600 amp switchboard with protected by a 1600 amp circuit breaker with ground fault protection. The main tripped for the third time this year. Twice because of a faulty compressor in a roof top unit and once from a light switch.
What is bothering me is the last tripping of the main. The facility maintenance man was "fixing" a switch that had become loose. He was working on it hot and was tightening the terminals (that's his story). Anyway..."poof" the whole building goes down again.
Building owner is looking for solutions to eliminate the main from tripping. He was told that the GFP is doing exactly what its suppose to do. But that is not good enough, he fails to believe that a light switch can take down the whole building.
What is bothering me is the last tripping of the main. The facility maintenance man was "fixing" a switch that had become loose. He was working on it hot and was tightening the terminals (that's his story). Anyway..."poof" the whole building goes down again.
Building owner is looking for solutions to eliminate the main from tripping. He was told that the GFP is doing exactly what its suppose to do. But that is not good enough, he fails to believe that a light switch can take down the whole building.