Electrical Capstone Practical Exam. Polarity. Correct Installation verification / Fault Find

Tutorial and tips for fault finding polarity.
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Error: 7:46 Me testing the phase sequence of the 3Phase outlet.
The reason I had a reading was due to my main switch being switched on and having my phases bridged on the Lineside . Once I switched off my main switch at 8:56 I was able to test individually Red to L! White to L2 Blue to L3.
Sorry I'm not perfect guys I had a bit of a DohL moment there.
Two ways to test Polarity:
Individually test: A-A N-N E-E L1-L1 L2-L2 L3-L3 using continuity method.
Use Resistance leads -If you are using Trailing leads remember to test the resistance of your trailing lead and incorporate that trailing lead resistance into your expected resistance reading for each combination your testing.