I have an older house with a pushmatic load center. I want to replace it this summer but for now I just need to know how to turn a circuit on and off. Obviously it's called pushmatic because you push it some way or another. I just don't want to end up electrocuted by doing something stupid. I'm replacing my dishwasher and I need to hardwire it. Obviously I need to shut off power to that circuit. Do I just push the breaker to turn it off and then push it again to turn it on? I have a voltage sensor to test the wires before I do anything. But considering I've always had modern type circuit panels I'm at a loss as to how a pushmatic works.