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根据UL498要求，6个连接器应当按表93.1要求的插头连续插拔10次插入拔出无孔插脚后，按表93.1要求，一个重3磅（13N）力施加于垂直结合面对插头在保持一分钟后，位移不应当大于2mm。
根据表93.1要求，5-20R，应当使用5-20P和1-15P插头测试。测试时，地线脚需移除。
93.3 Each of six devices is to be subjected to ten conditioning cycles of insertion and withdrawal of a standard solid-blade attachment plug that has American National Standard detent holes in accordance with Wiring Devices – Dimensional Specifications, ANSI/NEMA WD6, in rigidly mounted blades, following which the plug is to be fully reinserted into the device. The mating plugs are to have the configuration indicated in Table 93.1. A pull of 3 lbf (13 N) in a direction perpendicular to the plane of the face of the cord connector and tending to withdraw the plug from the device is then to be applied to the plug for 1 minute. The displacement of the plug shall not be greater than 0.079 inch (2 mm).
| Device under test | Mating plug | No. of devices tested |
| 1-15R | 1-15P | 6 |
| 5-15R | 1-15P | 6 |
| 5-20R | 1-15P 5-20P(a) | 3 3 |
| 6-15R | 2-15P | 6 |
| 6-20R | 2-15P 6-20P(a) | 3 3 |
| a Shall have the ground blade removed. |
Exception: Connectors may instead be subjected to the Retention of Blades Test, Section 111.2 and 111.3 (conditioning and 3 lb retention).
