A grounding electrode conductor must connect the service neutral conductor to the grounding electrode at any accessible location, from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral, up to and including. A grounding electrode conductor must connect the service neutral conductor to the grounding electrode at any accessible location, from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral, up to and including. Correct grounding of services depends upon understanding the definition and role of the grounded conductor. The neutral conductor is typically the grounded conductor connected to the system's neutral point, carrying current under normal operation. Grounding electrode conductors must be connected at. A sub panel is a secondary distribution point that receives power from the main service panel, allowing for the extension of electrical service to a remote area of a building or a separate structure like a garage or shed. The basic rule achieves this through an equipment grounding jumper; four exceptions allow other methods. In addition, four installation rules warrant the continuity of the equipment. Resistance Rule: If the resistance to ground of a single rod measures more than 25 ohms, a second rod must be installed.