The average speeds are given in Table 5-6. Ten tests were run on asphalt concrete (AC) surfaces and four on portland cement concrete (PCC). All tests cut to a 1-inch (2.5-cm) depth. The installation of the cable requires the forming of the loop size including the leads to terminal end with some spare, cutting the cable, and immediately sealing the terminal ends to prevent absorption of moisture by the mineral. Typical installation details are shown in Figure 5-25. Figure 5-24. Standard pull box. 1 inch = 2.5 cm Figure 5-25. Pull box installation detail. Rubberized asphalt appears to be the sealant of choice, particularly for asphalt pavements. Preformed loops are usually encased in a protective jacket or conduit to mechanically and electrically isolate the coil and lead-in wires.