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20.20.027 <br />crystalline and multi-crystalline <br />silicon modules, the rated open-cir- <br />cuit voltage shall be multiplied by <br />the correction factor provided in <br />Table 690.7. This voltage shall be <br />used to determine the voltage rating <br />of cables, disconnects, over current <br />devices, and other equipment. Where <br />the lowest expected ambient tempera- <br />ture is below -40°C (-40°F), or <br />where other than crystalline or multi- <br />crystalline silicon photovoltaic mod- <br />ules are used, the system voltage <br />adjustment shall be made in accor- <br />dance with the manufacturer's in- <br />structions. <br />Table 690.7 Voltage Correction Factors for Crystalline and Multi-crystalline Silicon <br />Modules <br />Ambient <br />Temperature <br />(°C) <br />25 to 10 <br />9 to 0 <br />-1 to -10 <br />-11 to -20 <br />-21 to -40 <br />1.06 <br />1.10 <br />1.13 <br />1.17 <br />1.25 <br />Ambient <br />Temperature <br />(°F) <br />77 to 50 <br />49 to 32 <br />31 to 14 <br />13 to -4 <br />-5 to -40 <br />(B) Direct-Current Utilization Cir- <br />cuits. The voltage of do utilization <br />circuits shall conform with 210.6. <br />(C) Photovoltaic Source and Output <br />Circuits. In one and two-family <br />dwellings, photovoltaic source cir- <br />Correction Factors for <br />Ambient Temperatures <br />Below 25°C (77°F) <br />(Multiply the rated <br />open-circuit voltage by <br />the appropriate <br />correction factor shown <br />below.) <br />cuits and photovoltaic output circuits <br />that do not include lampholders, fix- <br />tures, or receptacles shall be permit- <br />ted to have a maximum system volt- <br />age up to 600 volts. Other installa- <br />tions with a maximum system volt- <br />age over 600 volts shall comply with <br />Article 690, Part I. <br />(Pleasanton April 2003) '] 1 Q_ 1 g <br />