Yes and no, the Service Breakers in your home panel are there for safety yes. However when you sign up for Services you sign up for a given Amp level of servi

Yes and no, the Service Breakers in your home panel are there for safety yes. However when you sign up for Services you sign up for a given Amp level of service, the Power company then has the expectation to be able to supply you with that level of current at that location Most residential Homes have either 100 or 200amp service. 100amp service would probably be enough to run about 50 cards (assuming each card running at at 250w power draw that may be high no idea)