9.7.7.2 Verification of correct performance in the case of hazardous live protective conductorSubclause 9.7.7.2 is only applicable for IC-CPDs classified according to 4.4.2. The IC-CPDs shall comply if the following conditions are fulfilled:– they do not close if the protective conductor is hazardous live, or– if they do close they shall re-open in a time not exceeding 300 ms, either automatically, or when closed on the rated residual current flowing in any terminal which is live.IC-CPDs shall be connected in turn as in Figures 4a) to 4j), as applicable. With S1 in closed position, the IC-CPD initiating the closing shall be operated in each position.If the contacts do not close, the unit complies.If the contacts close then by use of S2, a further test is made with a resistor connected from the protective conductor load terminal to the supply protective conductor. The resistor value shall be adjusted to produce rated residual current (Ue/I∆n for LNSE types, Ue/I∆n or Ue/2 divided by I∆n for LLSE dependant on the connection).9.7.7.3 Verification of correct performance in case of open neutral (LNSE / LNE and LLLNSE / LLLNE) and open line (LLSE / LLE) The required performance of IC-CPDs should take place under the following conditions: