Thank you for the details . I have adopted ERIC principle from IPEM report number 97- Regarding guide to Electrical safety testing of medical equipment. ERIC principle are memorised words to carry out systematic electrical safety test for medical devices. here in East Sussex , most medical engineers adopt it.
If safety testing using test equipment is appropriate, then the order in which the three basic sets of tests are carried out is important for the safety of the tester. the safe order can be summarised as : Earth Resistance, Insulation and leakage Currents.
IPEM suggest the acronym ER-IC to describe and help newbies engineer to remember this important safety point.
Hope that this help?