名称: UL498图123.2地线孔连接测试针|UL插座地线孔量规|Figure123.2 Test pin B|Grounding Contact Test Gauge
标准： UL498-2012 Attachment Plugs and Receptacles（或最新版）要求；
使用说明: Each device is then to be tested for electrical continuity between the receptacle grounding contact and the fully inserted test pin B, Figure 123.2. There shall not be a loss of contact while the pin is moved by hand, without exerting undue pressure, so as to touch all internal walls and surfaces. The stop ring of the pin is to remain continuously in contact with the face of the receptacle. An indicating device, such as an ohmmeter, a battery-and-buzzer combination, or other similar device, is to be used.