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20.20.028 692.31 Wiring Systems. All raceway and cable wiring meth- ods included in Chapter 3 of this Code and other wiring systems and fittings specifically intended and identified for use with fuel cell sys- tems shall be permitted. Where wir- ing devices with integral enclosures are used, sufficient length of cable shall be provided to facilitate re- placement. V. Grounding 692.41 System Grounding. For a fuel cell system output circuit, one conductor of a 2-wire system rated over 50 volts and a neutral conductor of a 3-wire system shall be solidly grounded by either 692.41(A) or (B). (A) Stand-Alone Systems. Grounding and bonding shall be in accordance with 250.30. (B) Other Than Stand-Alone Sys- tems. (1) Two-Wire Systems. One con- ductor shall be terminated at the grounded circuit conductor terminal of the premises wiring system. (2) Three-Wire Systems. The neu- tral conductor shall be terminated at the grounded circuit conductor terminal of the premises wiring system. 692.44 Equipment Grounding Con- ductor. A separate equipment-grounding conductor shall be installed. 692.45 Size of Equipment Grounding Conductor. The equipment-grounding conductor shall be sized in accordance with 250.122. 692.47 Grounding Electrode System. Any supplementary grounding elec- trode(s) required by the manufacturer shall be connected to the equipment- grounding conductor specified in 250.118. VI. Marking 692.53 Fuel Cell Power Sources. A marking specifying the fuel cell system, output voltage, output power rating, and continuous output current rating shall be provided at the dis- connecting means for the fuel cell power source at an accessible loca- tion on the site. 692.54 Fuel Shut-Off. The location of the manual fuel shut- off valve shall be at the location of the primary disconnecting means of the building or circuits supplied. 692.56 Stored Energy. A fuel cell system that stores elec- trical energy shall require the follow- ing warning sign, or equivalent, at the location of the service discon- necting means of the premises: 710-35 (Pleasanton April 2003)