two optional wiring diagrams are provided fig 1 is the diagram as recommended in DOD-Handboook -263 (Ref 4). Note that the wrist strap and the table mat are connected in series to ground, while the floor mat, through to ground. in effect, this diagram provides 2 Mohms of resistance to ground for the person wearing the wrist strap and 1MOhm of resistance to ground form both the table mat and floor mat.