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Questions And Answers

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Question If I Use Foot Grounders (on Both Feet) Do I Need Any Other Grounding Device (e.g. Wrist Strip) for Full Grounding Protection? Anonymous, Oklahoma City, Oklahoma
Answer Yes, using foot grounders on both feet may be adequate if the following conditions are met:1) the floor you are walking on is an ESD floor (conductive and grounded) 2) you never have both feet off the ground (i.e., sitting) 3) the foot grounders have been tested and proven functional. 

Re-reading the answer we just wanted to make it clear that you might think that we answered it is OK even if sitting. Per S20.20: "When personnel are seated at ESD protective workstations, they shall be connected to the common point ground via a wrist strap system." and "ESD protective flooring, used with approved footwear, may be used as an alternative to the wrist strap system for standing operations."

From S20.20 paragraphs: 6.2.2. Personnel Grounding 6.2.2.1. Personnel Grounding Requirements - All personnel shall be bonded or electrically connected to ground or contrived ground when handling ESD sensitive items. When personnel are seated at ESD protective workstations, they shall be connected to the common point ground via a wrist strap system. NOTE: The Organization must be aware of local safety laws and/or codes when grounding personnel while working with energized equipment.6.2.2.2 Personnel Grounding Guidance The personnel grounding system in all cases includes the person, the control item(s) and connection to ground. A log should be maintained which verifies that personnel have tested their personal grounding devices. Personnel should check constant monitoring devices (when used) to ensure that they are functional and operating before ESDS products are handled. In addition, constant monitoring devices should be functionally checked periodically to ensure that they are operating as designed. ESD protective flooring, used with approved footwear, may be used as an alternative to the wrist strap system for standing operations. Footwear includes foot grounders, shoes or booties. When equipment ground or auxiliary ground systems are not available, bonding or electrical connections (contrived ground) may be used.
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