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primary source(s) of electricity, the requirements in 705.14, <br />705.16, 705.32, and 705.43 shall apply. <br /> <br />690.4 Installation. <br /> <br />(A) Solar Photovoltaic System. A solar photovoltaic system <br />shall be permitted to supply a building or other structure in <br />addition to any service(s) of another electricity supply <br />system(s). <br /> <br />(B) Conductors of Different Systems. Photovoltaic source <br />circuits and photovoltaic output circuits shall not be <br />contained in the same raceway, cable tray, cable, outlet <br />box, junction box, or similar fitting as feeders or branch <br />circuits of other systems, unless the conductors of the <br />different systems are separated by a partition or are <br />connected together. <br /> <br />(C) Module Connection Arrangement. The connections to a <br />module or panel shall be arranged so that removal of a <br />module or panel from a photovoltaic source circuit does not <br />interrupt a grounded conductor to another photovoltaic <br />source circuit. Sets of modules interconnected as systems <br />rated at 50 volts or less, with or without blocking diodes, <br />and having a single over current device shall be considered <br />as a single-source circuit. Supplementary over current de- <br />vices used for the exclusive protection of the photovoltaic <br />modules are not considered as over current devices for the <br />purpose of this section. <br /> <br />(D) Equipment. Inverters or motor generators shall be <br />identified for use in solar photovoltaic systems. <br /> <br />690.5 Ground-Fault Protection. <br /> <br />Roof-mounted do photovoltaic arrays located on dwellings <br />shall be provided with do ground-fault protection to reduce <br />fire hazards. <br /> <br />(A) Ground-Fault Detection and Interruption. The ground- <br />fault protection device or system shall be capable of <br />detecting a ground fault, interrupting the flow of fault cur- <br />rent, and providing an indication of the fault. <br /> <br />66 <br /> <br /> <br />