Confirmation required for compliance to ER Section 6 Part B3 Cl 7.3.1.1 in particular the following:(i)Wherever two circuit breaker compartments are provided in the same vertical section, insulating barriers and shrouds shall be provided in the rear cable compartment to avoid accidental touch with the live parts of one circuit while working on the other.(ii)After isolation of power and control circuit connections, it shall be possible safely carry out maintenance in a compartment with the busbar and adjacent circuit live.