One company I worked at used ESD smocks. I would tend to agree that not grounding the smock along with the wrist strap could limit its effectiveness in dissipating static charges. All materials have a property of electrical conductivity ranging from pure insulator to pure conductor. Any material can and will hold a charge. The better the insulator the harder it is to dissipate that charge. The ESD smock, if ungrounded, could develop a charge and thus propose a threat to sensitive devices. Blair -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon Sent: Thursday, February 01, 2007 10:27 AM To: [log in to unmask] Subject: [TN] FW: January 2007 ESD Systems.com Newsletter Technetters: Does any body have an opinion on grounded Smocks? Ramon From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Banana Jack Sent: Tuesday, January 23, 2007 2:30 AM To: Lusby, Jack R. Subject: January 2007 ESD Systems.com Newsletter Here is the latest ESD news from ESD Systems.com: http://www.ESDSystems.com/Newsletters/v10issue1.html ******************************************************************* This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.Hubbell.com - Hubbell Incorporated --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------