If the building has large motors, driving such things as fans, pumps, elevators, etc., these should also be on the multipoint grid. 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