I consider myself pretty much an IC2 veteran (except crops, never bothered with crops). I STILL accidentally forget to put in a transformer or rotate a block instead of remove it or accident place a cable wrong etc. and end up blowing up a machine or two. Sometimes expensive ones. It would be even better if items were crafted having a fuse in place. To me that would completely solve the problem of exploding machines being a bit TOO much of a penalty for bad wiring.