DITEK’s 100-640 Grounding Bar Kit is a 5-position grounding buss used for making good mechanical and electrical connections when terminating multiple grounding conductors. This method is preferred over using a wire nut to bond multiple grounding conductors together. We recommend that the ground from the DITEK surge suppressor be terminated to an open position on the ground bus. Then, using a larger gauge grounding conductor, bond the ground buss to an appropriate ground. NEC requires a ground to be 25 Ohms or less impedance. IEEE recommends 5 Ohms or less for optimum ground performance.