So my wife and I are both pretty confident that Electric cars are here to stay, if not the absolute way of the future. We have agreed to purchase our first Tesla (Model S) in the next few months and since her car is still fairly new we are making plans to purchase the family's Model X likely in 2020. As we plan things out and look at what is realistic we realise that there is a high likelyhood that our oldest son may end up with a Model 3 (or maybe the Model Y) sometime around 2024 (only 8 years out....wow). We currently live in Chicago, which means all of the kitchen and the dryer run off natural gas. This means that the number of 220 lines in the home are pretty scarce. So we will be hiring an electrician in the next few weeks to install a new panel box and run the lines. So here is the question. Considering we may be looking at Three electric cars in the next 8 years, all being powered from the garage what sort of Amp ratting should we tell the installer to build the system to handle? Run three separate lines at 80 amp each? Or run one massive line for all three cars? Thoughts?