So technicians will not get electrocuted…?
My mats are insulators and they had better be “normal” considering the money I paid for them. I am a bit rusty, but as I recall static electricity, which has very large voltage potentials can flow with a minuscule current on a rubber, etc. surface to a grounding point (otherwise rubber or glass rods would not attract—as I recall--bits of paper when rubbed with wool/charged-up). Conductive mats and mats that are conductive on one side and nonconductive on the other side, which can be used with either side up depending on the desired kind of dissipation, are available also; however, the discharge rates for conductive/metallic mats are much faster and the surge can damage circuit boards, etc. From the name of your organization, I would think that you might find an engineer or even a professor there to answer the question in more (perhaps excruciating) detail. Here’s some stuff on the subject: http://www.school-for-champions.com/science/staticexpl.htm. Larry