Proper Method to Ground an Old Electrical Fuse Box Inside the Fuse Box: A neutral bar (a metal strip with terminals for various connections) receives the bare ground wire, connecting the power supply to the ground rod. Another wire should connect the neutral bar to the neutral wire of the main power supply. Grounding Outlets. Old fuse box electrical systems were installed with ungrounded outlets. Short Circuit vs. Ground Fault A ground fault is a type of fault in which the unintentional pathway of the straying electrical current flows directly to the earth (to ground). Here, too, the circuit is "short," in that it has bypassed the circuit wiring, so a ground fault can technically be defined as one type of short circuit. Where do you connect the ground cable to a fuse box? - Quora Green ground (earth ground) connects to earth at the power pole (ground connected to center tap of secondary). Also, the neutral connects to the center tap and physically continues to your house. When the neutral and 2 hot wires from either side o..