2003 APRIL - Laserfiche WebLink

20.20.027 on-site assembly, where listed for such use, shall be permitted for on- site interconnection of modules or other array components. Such fittings and connectors shall be equal to the wiring method employed in insula- tion, temperature rise, and fault- current withstand, and shall be capa- ble of resisting the effects of the environment in which they are used. located behind modules or panels shall be installed so that the wiring contained in them can be rendered accessible directly or by displace- ment of a module(s) or panel(s) secured by removable fasteners and connected by a flexible wiring sys- tem. V. Grounding 690.33 Connectors. 690.41 System Grounding. The connectors permitted by Article 690 shall comply with 690.33(A) through (E). (A) Configuration. The connectors shall be polarized and shall have a configuration that is non-interchange- able with receptacles in other electri- cal systems on the premises. (B) Guarding. The connectors shall be constructed and installed so as to guard against inadvertent contact with live parts by persons. (C) Type. The connectors shall be of the latching or locking type. For a photovoltaic power source, one conductor of a two-wire system with a system voltage over 50 volts and the reference (center tap) conductor of a bipolar system shall be solidly grounded or shall use other methods that accomplish equivalent system protection in accordance with 250.4(A) and that utilize equipment listed and identified for the use. 690.42 Point of System Grounding Connection. The do circuit grounding connection shall be made at any single point on the photovoltaic output circuit. (D) Grounding Member. The ground- FPN: Locating the grounding con- ing member shall be the first to make nection point as close as practica- and the last to break contact with the ble to the photovoltaic source mating connector. better protects the system from voltage surges due to lightning. (E) Interruption of Circuit. The con- nectors shall be capable of interrupt- 690.43 Equipment Grounding. ing the circuit current without hazard to the operator. Exposed non-current carrying metal parts of module frames, equipment, 690.34 Access to Boxes. and conductor enclosures shall be grounded in accordance with 250.134 Junction, pull, and outlet boxes or 250.136(A) regardless of voltage. 710-25 (Pleasanton April 2003)