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20.20.027 <br />photovoltaic system shall have a per- <br />manent plaque or directory providing <br />the location of the service discon- <br />necting means and the photovoltaic <br />system disconnecting means, if not <br />located at the same location. <br />VII. Connection to Other Sources <br />690.60 Identified Interactive Equip- <br />ment. <br />Only inverters and ac modules listed <br />and identified as interactive shall be <br />permitted in interactive systems. <br />690.61 Loss of Interactive System <br />Power. <br />An inverter or an ac module in an <br />interactive solar photovoltaic system <br />shall automatically de-energize its <br />output to the connected electrical <br />production and distribution network <br />upon loss of voltage in that system <br />and shall remain in that state until <br />the electrical production and distribu- <br />tion network voltage has been re- <br />stored. <br />A normally interactive solar photo- <br />voltaic system shall be permitted to <br />operate as a stand-alone system to <br />supply loads that have been discon- <br />nected from electrical production and <br />distribution network sources. <br />690.62 Ampacity of Neutral Conduc- <br />tor. <br />If a single phase, 2-wire inverter <br />output is connected to the neutral <br />and one ungrounded conductor (only) <br />of a 3-wire system or of a 3-phase, <br />4-wire way-connected system, the <br />maximum load connected between <br />the neutral and any one ungrounded <br />conductor plus the inverter output <br />rating shall not exceed the ampacity <br />of the neutral conductor. <br />690.63 Unbalanced Interconnections. <br />(A) Single Phase. Single-phase <br />inverters for photovoltaic systems <br />and ac modules in interactive solar <br />photovoltaic systems shall not be <br />connected to 3-phase power systems <br />unless the interconnected system is <br />designed so that significant unbal- <br />anced voltages cannot result. <br />(B) Three Phase. Three-phase <br />inverters and 3-phase ac modules in <br />interactive systems shall have all <br />phases automatically de-energized <br />upon loss of, or unbalanced, voltage <br />in one or more phases unless the in- <br />terconnected system is designed so <br />that significant unbalanced voltages <br />will not result. <br />690.64 Point of Connection. <br />The output of a photovoltaic power <br />source shall be connected as speci- <br />fied in 690.64(A) or (B). <br />(A) Supply Side. A photovoltaic <br />power source shall be permitted to be <br />connected to the supply side of the <br />service disconnecting means as per- <br />mitted in 230.8(5). <br />(B) Load Side. A photovoltaic power <br />source shall be permitted to be con- <br />nected to the load side of the service <br />(Pleasanton April 2003) '] 10_28 <br />