No. The clip is just to make better contact with a grounded box.
If the box is not grounded by a ground wire or metal conduit it is just a box.
A simple test to see if the box is grounded, is to use a multi meter between hot and box. A grounded box should read ~120 volts, an ungrounded box should read 0 volts.
Most people are familiar with static electricity. They&#;ve heard the crackling when removing clinging fabrics from the dryer, or they&#;ve felt a slight electric shock when touching a door knob or other metal object after walking across a carpeted floor. During the winter, or when the air is very dry, the effects of static electricity are more noticeable. But, did you know static discharge is also a major cause of industrial fires and explosions?
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In the United States, nearly 300 incidents are reported annually. In one incident, a simple task of filling a bucket with toluene caused a significant fire. The operator hung a metal bucket with a wire bail and plastic handle on a globe valve during dispensing and stood back while the bucket filled. Suddenly, the toluene ignited, leaving the operator unable to extinguish the fire with a small hand-held extinguisher. He left the scene to grab a larger fire extinguisher, but the fire was too large when he returned. He could no longer access the valve to shut off the toluene supply, providing the fuel for the large blaze. It resulted in major property damage.
Investigators identified a spark caused by static discharge started the fire. The ungrounded bucket&#;s plastic handle insulated it from the piping system. This led to a difference in charge between the two but could have been prevented with proper bonding and grounding procedures.
Friction between different types of material creates static electricity. When contact is made, electrons may transfer from one material to the other. This creates an imbalance of electrical charges. Transferring or pouring flammable liquids also generate energy, increasing the risk of static electricity.
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