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Question I usually wear one foot grounder, but have been told to wear two, one on each foot. Why? - Anonymous, Boston, MA
Answer The foot grounder only works properly when worn correctly and in conjunction with a conductive or dissipative floor. The act of walking is a perfect example of triboelectric generation. If your properly worn foot grounder is in contact with an ESD floor, then all charges on your body (skin) are drained to ground so the net difference (voltage) between you and ground is zero. But, as soon as that foot with the foot grounder is lifted into the air, your body becomes charged again, either through induction from your clothing or triboelectric generation from the contact and separation of your foot (feet). If you were to wear two foot grounders, one on each foot, then you further minimize the chance you have of holding a net charge much greater than a few volts (typically 2,000 - 5,000 Volts) because you are increasing your time in a grounded state. We recommend wearing a foot grounder on each foot or a pair of ESD shoes when you go mobile.
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