Article 692 Fuel Cell Systems
Informational Note: Some fuel cell systems can be interactive with other electrical power production sources, are stand-alone, or both. Some fuel cell systems are connected to electric energy storage systems such as batteries. Fuel cell systems can have ac output(s), dc output(s), or both for utilization.
Informational Note: In the case of sites that have series-or parallel-connected multiple units, the term output circuit also refers to the conductors used to electrically interconnect the fuel cell system(s).
Where all terminals of the disconnecting means may be energized in the open position, a warning sign shall be mounted on or adjacent to the disconnecting means. The sign shall be clearly legible and shall have the following words or equivalent:
ELECTRIC SHOCK HAZARD.
DO NOT TOUCH TERMINALS.
TERMINALS ON BOTH THE LINE AND LOAD SIDES MAY BE ENERGIZED IN THE OPEN POSITION.
The danger sign(s) or label(s) shall comply with 110.21(B).
The warning sign(s) or label(s) shall comply with 110.21(B).