Pset_ElectricDistributionBoardOccurrence Properties that may be applied to electric distribution board occurrences. IfcElectricDistributionBoard IfcElectricDistributionBoard IsMain Identifies if the current instance is a main distribution point or topmost level in an electrical distribution hierarchy (= TRUE) or a sub-main distribution point (= FALSE). Is Main IsSkilledOperator Identifies if the current instance requires a skilled person or instructed person to perform operations on the distribution board (= TRUE) or whether operations may be performed by a person without appropriate skills or instruction (= FALSE). Is Skilled Operator