 However, they should not be on segments of the grid that will service equipment such as audio amplifiers, small signal radio circuits, computer networks, sensitive electrical instrumentation, etc.Since building two grids into the same building may be prohibitively expensive, a good compromise is to connect the low frequency, high current equipment to the grid at or near the ground rods and entrance transformers, in such a way that their load 
will not flow across the segment of the grid connected to the low current equipment.Thus the system is still an electrically continuous unit, but motor noise does not impinge directly into signal paths.