A string box is a collection box for DC cabling, in which the strings are secured by means of pin fuses. The string boxes provide extra protection in the event of a short circuit in the DC side, or the event of a lightning strike. With larger strings, reverse current can occur. Therefore it is necessary (according to NEN 1010) to provide solar panel installations with 3DC strings or more with fuses. View the string safety boxes of HIS and Conduct below in the product range.