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(2) Nominal operating ac frequency <br />(3) Maximum ac power <br />(4) Maximum over current device rating for ac module pro- <br /> tection <br /> <br />690.53 Photovoltaic Power Source. <br /> <br />A marking, specifying the photovoltaic power source rated <br />as follows, shall be provided by the installer at the site at an <br />accessible location at the disconnecting means for the <br />photovoltaic power source: <br /> <br />(1) <br />(2) <br />(3) <br />(4) <br /> <br />Operating current <br />Operating voltage <br />Maximum system voltage <br />Short-circuit current <br /> <br />FPN: Reflecting systems used for irradiance enhancement <br />may result in increased levels of output current and power. <br /> <br />690.54 Interactive System Point of Interconnection. <br /> <br />All interactive system(s) points of interconnection with <br />other sources shall be marked at an accessible location at <br />the disconnecting means as a power source with the <br />maximum ac output operating current and the operating ac <br />voltage. <br /> <br />690.55 Photovoltaic Power Systems Employing Energy <br />Storage. <br /> <br />Photovoltaic power systems employing energy storage shall <br />also be marked with the maximum operating voltage, <br />including any equalization voltage and the polarity of the <br />grounded circuit conductor. <br /> <br />690.56 Identification of Power Sources. <br /> <br />(A) Facilities with Stand-Alone Systems. Any structure or <br />building with a photovoltaic power system that is not <br />connected to a utility service source and is a stand-alone <br />system shall have a permanent plaque or directory installed <br />on the exterior of the building or structure at a readily <br />visible location acceptable to the authority having jurisdic- <br /> <br />80 <br /> <br /> <br />