安規測試提問

HI-POT test  條件如下:
1414Vdc or 1000Vac, 10mA for 60 sec between Primary to Ground circuit and Chassis.
2828Vdc or 2000Vac, 10mA for 60 sec between Primary to Secondary circuit (not include earth
pin)
問題一﹕Primary to Ground是指大地還是二次地﹖
問題二﹕Primary to Secondary 次級是否包含二次地還是僅為輸出正極端﹖
問題三﹕初次地與二次地相連一起﹐上述條件是否合理﹖
是否有相關文件解釋上述三個問題﹖
我已經查過UL1310﹑GB4943無法解釋上述三個問題﹐請大蝦支招.