Ground Merging Interference Diagrams Common design specifications prohibit dirty and clean grounds from being riveted together. If the difference between the high and low ground currents exceeds 1/5, the two ground circuits cannot be riveted together. Note, however, that this is a fairly conservative design specification, and the two loops can be riveted together if a thorough analysis is done. It can be known from the above analysis that in order to reduce the interference caused by riveting as much as possible, the value of L1 should be reduced as much as possible, that is, the resistance between the riveting point and the ground should be reduced. Therefore, the riveting point should be as close as possible to the ground plate, and if necessary, the wire diameter of this section should be increased.