We had lots of problems with the main breaker tripping due to impact. After changing it's orientation and cushioning it, the problem of impact was gone. We did, however, trip the breaker due to current: We were alone in the mid-field (thus, no chance of impact), with 2 drill motors, 2 chapuia, 2 seats, the light and the compressor on. Will never happen again, but it is indeed possible to trip it by current.
