19.3 The voltage drop in a protecti

19.3 The voltage drop in a protective grounding system is measured after applying a test current of 200% of the rating of the overcurrent protection device rating, for a duration corresponding to 200% of the time-current characteristic of the overcurrent protection device. If the duration for 200% is not given, a point closest on the time-current characteristic is to be used. The overcurrent protective device limits the fault current in the protective grounding system, and is either provided in the EESS or external to the EESS and specified in the installation instructions. The supply used to provide the test current is to have a no load voltage not exceeding 60 Vdc.19.4 The voltage drop measurement is made between any two conductive parts of the grounding system.19.5 The resistance shall be calculated from the measured voltage drop and current. The determined resistance shall be less than or equal to 0.1 Ω.19.6 To check the continuity of the bonding connections, the resistance can be measured between two points on the bonding connections using a milli-ohmmeter. The measured resistance between any two bonding connections shall be less than or equal to 0.1 Ω.