I know it varies per outlet, fuse, circuit and machine but GENERALLY, how many pins can be safely connected to a typical, residential electrical circuit? I'm assuming it doesn't matter so much if they're all plugged into ONE outlet (via surge protector) or in multiple outlets -if they're all still drawing power from the same circuit, how many pins can I run at the same time? I have a 150amp (residential) box. Just wondering, because as the collection grows, should too should my power supply? Thanks for any insight!