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.