Is replaced, the entire branch circuit shall use an equipment groundingĬonductor that complies with all other provisions of paragraph (g) ofĪn important point to make here is that the grounding and grounded conductorsĪre only allowed to be connected together on the line side of the serviceĭisconnecting means they are generally not allowed to be connected on To a grounded cold water pipe near the equipment if the extension was (iii) On extensions of existing branch circuits, which do not have anĮquipment grounding conductor, grounding-type receptacles may be grounded For an ungrounded separately derived system, theĮquipment grounding conductor shall be connected to the grounding electrodeĬonductor at, or ahead of, the system disconnecting means or overcurrent (ii) For an ungrounded service-supplied system, the equipment groundingĬonductor shall be connected to the grounding electrode conductor at Of the system disconnecting means or overcurrent devices if the system Supply side of the service disconnecting means, or on the supply side Both the equipment grounding conductor and the grounding electrodeĬonductor shall be connected to the grounded circuit conductor on the (i) For a grounded system, a grounding electrodeĬonductor shall be used to connect both the equipment grounding conductorĪnd the grounded circuit conductor to the grounding electrode. (ii), and (iii) (NEC Section 250.24 provides a more in-depth requirement) The grounded service conductor is also connected to the groundingĮlectrode conductor. This means that each grounded service must have a groundingĮlectrode conductor connected to the grounding electrode and to the serviceĮquipment. The premises wiring system of a grounded electrical service must be Grounding Service-Supplied Alternating-current Systems Table 1 Comparison of System Grounding Methods: Method of grounding Table 1 shows the advantages andĭisadvantages of the various grounding methods. In some cases, the chosen method of grounding isĪ compromise among conflicting goals. It is not always possible to accomplish all these goals with a particular To provide for current flow and allow detection and location of ground.Control of the voltage to ground to within predictable limits.Power systems are grounded for one or more of the following reasons: Electrical Safety: Grounding and Bonding of Electrical Systems and Equipment (part 2) Electrical Safety: Grounding and Bonding of Electrical Systems and Equipment
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