of the following:

(1) Nonmetallic jacketed multiconductor cables

(2) Conductors installed in raceways, or

(3) Conductors listed and identified as Photovoltaic (PV) Wire installed as exposed, single conductors.

(E) The photovoltaic power system direct-current circuits shall be permitted to be used with ungrounded battery systems complying with 690.71(G).
(F) The photovoltaic power source shall be labeled with the following warning at each junction box, combiner box, disconnect, and device where energized, ungrounded circuits may be exposed during service:
WARNING ELECTRIC SHOCK HAZARD.
THE DC CONDUCTORS OF THIS PHOTOVOLTAIC SYSTEM ARE UNGROUNDED AND MAY BE ENERGIZED.
(G) The inverters or charge controllers used in systems with ungrounded photovoltaic source and output circuits shall be listed for the purpose.

V. Grounding

690.41 System Grounding. For a photovoltaic power source, one conductor of a 2-wire system with a photovoltaic 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.

Exception: Systems complying with 690.35.

690.42 Point of System Grounding Connection. The dc

circuit grounding connection shall be made at any single point on the photovoltaic output circuit.
FPN: Locating the grounding connection point as close as practicable to the photovoltaic source better protects the system from voltage surges due to lightning.

Exception: Systems with a 690.5 ground-fault protection device shall be permitted to have the required grounded conductor-to-ground bond made by the ground-fault protection device. This bond, where internal to the ground-fault equipment, shall not be duplicated with an external connection.

690.43 Equipment Grounding. Exposed non-current- carrying metal parts of module frames, equipment, and conductor enclosures shall be grounded in accordance with250.134 or 250.136(A) regardless of voltage. An equipment grounding conductor between a PV array and other equipment shall be required in accordance with 250.110.

Devices listed and identified for grounding the metallic frames of PV modules shall be permitted to bond the exposed metallic frames of PV modules to grounded mounting structures. Devices identified and listed for bonding the metallic frames of PV modules shall be permitted to bond the exposed metallic frames of PV modules to the metallic frames of adjacent PV modules.
Equipment grounding conductors for the PV array and structure (where installed) shall be contained within the same raceway or cable, or otherwise run with the PV array circuit conductors when those circuit conductors leave the vicinity of the PV array.
690.45 Size of Equipment Grounding Conductors. Equipment grounding conductors for photovoltaic source
and photovoltaic output circuits shall be sized in accor-
dance with 690.45(A) or (B).

(A) General. Equipment grounding conductors in photo- voltaic source and photovoltaic output circuits shall be sized in accordance with Table 250.122. Where no overcur- rent protective device is used in the circuit, an assumed overcurrent device rated at the photovoltaic rated short- circuit current shall be used in Table 250.122. Increases in equipment grounding conductor size to address voltage drop considerations shall not be required. The equipment grounding conductors shall be