Figure 5-29. - Duplex receptacle electrical connection with the grounding system.
ground does not normally carry current. The only time it does is when there is a fault in the circuit. At all outlet boxes that require grounding according to the NEC, the equipment-grounding conductor must be fastened to the box with either a grounding clip or a grounding screw, as shown in figure 5-30.
When we speak of installing a device, we should be aware that, according to the NEC, a device is the part of an electrical system that is intended to carry, but not use, electrical energy; for example, switches and receptacles are devices. The grounded duplex receptacle comes equipped with a green hex-head screw to be used for connecting the ground wire. When more than one receptacle is connected in a circuit, the NEC requires that these receptacles be connected to the grounding wire in such a way that the continuity of the circuit equipment ground is not broken if the receptacle is removed This grounding method is accomplished as
Figure 5-30. - Grounding clip and grounding screw.Continue Reading