This standard covers the safe operation, substantial and durable construction, and acceptable performance of packaged stationary fuel cell power systems, which through electrochemical reactions and other processes, generate alternating-current or direct-current electricity. This standard applies to fuel cell power systems not exceeding a power output of 10 MW and that are for use with hydrogen gas, gaseous or liquid hydrocarbon fuel, or zinc particulate conveyed in a non-flammable liquid medium.