This standard applies to equipment used for the detection and optionally the interruption of electric d.c. arcs in photovoltaic (PV) system circuits. The standard covers test procedures for the detection of serial arcs within PV circuits, and the response times of equipment employed to interrupt the arcs. The standard defines reference scenarios according to which the testing shall be conducted. This standard covers equipment connected to systems not exceeding a maximum PV source circuit voltage of 1500 V d.c.. The detection of parallel circuit arcs is not covered in this document. This standard is not applicable to d.c. sources or applications other than PV d.c. sources. NOTE Parallel arc detection is under consideration for a future edition.