W-C-596H/GEN
4.6.8 Insulation resistance (see 3.6.7). The insulation resistance shall be measured between mutually insulated terminals and if applicable between each terminal and the metal shell of the connector except where the terminal is electrically continuous with armor or shell. Measurements shall be made by means of a megohm bridge or other approved method at a direct current potential of at least 500 volts to determine conformance to 3.6.7.
4.6.9 Isolated ground (isolated ground receptacles only) (see 3.1 and 3.6.8). Connectors shall be mounted to a metal outlet box and a metal box cover or metal wall plate attached. The resistance between the grounding contact and the outlet box cover shall be measured as specified in 4.6.8.
4.6.10 Heat resistance (see 3.6.9). Connectors shall be placed in an oven maintained at 85°C ±2°C (185°F ±4°F) for a period of at least two hours. After removal from the oven the connectors shall be examined for conformance to 3.6.9.
4.6.11 Mechanical shock (plugs and cable outlets only) (see 3.6.10).
4.6.11.1 Devices rated 15 and 20 amperes. Samples of the connectors shall be assembled to .25 inch (6.35 mm) braided nylon line of a length suitable for mounting as illustrated on figure 5. The line and connector shall be supported at point A so that when hanging freely, the plug takes the position (1). A moving member shall lift the line and connector assembly to the position B and then released so that it falls freely and strikes the impact board C. This constitutes one cycle of the test. Each sample shall be subjected to the above test for 1,300 cycles then tested for dielectric withstanding voltage and insulation resistance as specified in 4.6.7 and 4.6.8 respectively. The samples shall be considered acceptable if each sample completes not less than 500 cycles and the average number of cycles completed for all plugs tested is not less than 1,000. Samples shall be inspected every 50 cycles after completion of the first 450 cycles.
4.6.11.2 Devices rated 30 amperes and above. The unwired connector shall be dropped 50 times with random orientation through a vertical distance of three feet (914.40mm) (upon a steel plate at least .25 inch (6.35 mm) thick. At the completion of this test, the connector shall be examined for conformance to
3.6.10 and then tested for dielectric withstanding voltage and insulation resistance as specified in 4.6.7 and 4.6.8 respectively. Bent blades shall not be cause for rejection if they can be straightened without breaking at the end of the test.
4.6.12 Crushing (plugs and cable outlets only) (see 3.6.11). The connector shall be wired in accordance with 4.6.4 and placed between two parallel hardwood slabs, each at least .50 inch (12.7 mm) thick, with the major axis of the device parallel with the flat surfaces of the slabs. A compressive force shall be applied to the connector at right angles to the major axis and shall be increased to 75 pounds and maintained at that value for one minute. The connector shall be observed during the test and examined after the test for conformance to 3.6.11. For hospital grade, the compressive force shall be 500 pounds.
4.6.13 Strain relief (plugs and cable outlets only (see 3.5.4 and 3.6.12). The cable employed in the strain relief test shall have a smooth surface of the minimum diameter the plug is designed to utilize, and it shall be secured to the plug by means of the strain relief only. The conductor leads shall not be connected to terminals. When strain relief screws are provided, they shall be tightened to a maximum torque acceptable without stripping, but not to exceed 14 inch-pounds. With the plug held securely in place a mechanical force shall be applied to the cable in a direction tending to withdraw the cable from the plug. The force shall be increased to 30 ± 1 pounds and held at the value for one minute. Movement of the outer jacket shall not exceed the value specified in 3.6.12.
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