Today my main breaker circuit in my house was melted, four days after installing 3 antminers secured after a 16 amp breaker (1 pointed to kano, 1 to slush, 1 to mining-dutch) . No lights in house, it took two hours before the called mechanic from the electricity company installed a new main fuse, the old broken one of 25 amp was replaced by a heavier 35 amp. Problem is here in the Netherlands you can not see or look yourself at the main breaker fuse, so I assumed it was already 35 amp, the current standard. Wrong guess, old house, old main fuse. Will cost me 2 days mining to pay him.