ORD 1869 - Laserfiche WebLink

Standard values of supplementary over current devices allowed by this section shall be in one-ampere size incre- ments starting at one ampere up to and including 15 amperes. Higher standard values above 15 amperes for supplementary over current devices shall be based on the standard sizes provided in 240.6(A). (D) Direct-Current Rating. Over current devices, either fuses or circuit breakers, used in any do portion of a pho- tovoltaic power system shall be listed for use in do circuits and shall have the appropriate voltage, current, and inter- rupt ratings. (E) Series Over current Protection. In series-connected strings of two or more modules, a single over current pro- tection device shall be permitted. 690.10 Stand-Alone Systems. The premises wiring system shall be adequate to meet the requirements of this Code for a similar installation connected to a service. The wiring on the supply side of the building or structure disconnecting means shall comply with this Code except as modified by 690.10(A), (B), and (C). (A) Inverter Output. The ac inverter output from a stand- alone system shall be permitted to supply ac power to the building or structure disconnecting means at current levels below the rating of that disconnecting means. (B)Sizing and Protection. The circuit conductors between the inverter output and the building or structure dis- connecting means shall be sized based on the output rating of the inverter. These conductors shall be protected from over currents in accordance with Article 240. The over current protection shall be located at the output of the inverter. (C) Single 120-Volt Supply. The inverter output of a stand- alone solar photovoltaic system shall be permitted to supply 120 volts to single-phase, 3-wire, 120/240-volt service equipment or distribution panels where there are no 240- volt outlets and where there are no multi-wire branch 72