3 phase harmonics test??

[emc-p...@ieee.org]

 I perform the Harmonics test item with EUT supplied with 3 phase Power source
but  the Power source of EUT has not N phase.
 
in this case. Is it applicabel to the Harmonics test item even without the N
phase?
        
why I think of above question is that tthere isn't the reference of Impedence