ORD 1869 - Laserfiche WebLink

tions with a maximum system voltage over 600 volts shall comply with Article 690, Part I. (D) Circuits Over 150 Volts to Ground. In one- and two- family dwellings, live parts in photovoltaic source circuits and photovoltaic output circuits over 150 volts to ground shall not be accessible to other than qualified persons while energized. FPN: See 110.27 for guarding of live parts, and 210.6 for voltage to ground and between conductors. (E) Bipolar Source and Output Circuits. For 2-wire circuits connected to bipolar systems, the maximum system voltage shall be the highest voltage between the conductors of the 2-wire circuit if all of the following conditions apply: (1) One conductor of each circuit is solidly grounded. (2) Each circuit is connected to a separate sub array. (3) The equipment is clearly marked with a label as fol- lows: Warning-Bipolar Photovoltaic Array. Discon- nection of neutral or grounded conductors may result in over voltage on array or inverter. 690.8 Circuit Sizing and Current. (A) Computation of Maximum Circuit Current. The maximum current for the specific circuit shall be computed in accordance with 690.8(A)(1) through (A)(4). (1) Photovoltaic Source Circuit Currents. The maximum current shall be the sum of parallel module rated short-circuit currents multiplied by 125 percent. (2) Photovoltaic Output Circuit Currents. The maxi mum current shall be the sum of parallel source circuit maximum currents as calculated in 690.8(A)(1). (3) Inverter Output Circuit Current. The maximum cur rent shall be the inverter continuous output current rating. (4) Stand-Alone Inverter Input Circuit Current. The maximum current shall be the stand-alone continuous inverter input current rating when the inverter is producing rated power at the lowest input voltage. 69