NFPA 110-2002 Standard for Emergency and Standby Power Systems

NFPA 110-2002 Standard for Emergency and Standby Power Systems. 5.6.4.2.1 A complete cranking cycle shall consist of an auto- matic crank period ofapproximately 15 seconds followed by a rest period of approximately 15 seconds. Upon starting and running the prime mover, further cranking shall cease. 5.6.4.2.2 Two means ofcranking termination shall be utilized so that one serves as backup to prevent inadvertent starter engagement. 5.6.4.2.3 Otto cycle prime movers of15 kW and lower and all diesel prime movers shall be permitted to use continuous cranking methods. 5.6.4.3* Number of Batteries. Each prime mover shall be pro- vided with both ofthe following: (1) Storage battery units as specified in Table 5.6.4.2 (2) Astorage rack for each battery or battery unit 5.6.4.4* Size ofBatteries. The batteryunit shall have the capac- ity to maintain the cranking speed recommended by the prime mover manufacturer through two complete periods ofcranking limiter time-outs as specified in Table 5.6.4.2, item (d). 5.6.4.5 Type of Battery. The battery shall be of the nickel- cadmium or lead-acid type. 5.6.4.5.1* Lead-acid batteries shall be furnished as charged when wet. Drain-dry batteries or dry-charged lead-acid batter- ies shall be permitted. 5.6.4.5.2 When furnished, vented nickel-cadmium batteries shall be filled and charged and shall have listed flip-top, flame arrestor vent caps. 5.6.4.5.3 The manufacturer shall provide installation, opera- tion, and maintenance instructions and when shipped dry, electrolyte mixing instructions. 5.6.4.5.4 Batteries shall not be installed until the battery charger is in service. 5.6.4.5.5 All batteries used in this service shall have been de- signed for this duty and shall have demonstrable characteris- tics ofperformance and reliability acceptable to the authority having jurisdiction. 5.6.5.3 Engines equipped with a maintaining shutdown de- vice (air shutdown damper) shall have a set of contacts that monitor the position ofthis device, with local alarm indication and remote annunciation in accordance with Table 5.6.5.2. 5.6.5.4 The control panel in 5.6.5.2(4) shall be specifically approved for either a Level 1 or a Level 2 EPS consistent with the installation. 5.6.5.5 The cranking cycle shall be capable ofbeing initiated by any ofthe following: (1) Manual start initiation as specified in 5.6.5.2(2)(a). (2) Loss of normal power at any automatic transfer switch considered a part of the EPSS. Prime mover shall start upon closing ofaremote switch or contacts and shall stop, after appropriate time delays, when switch or contacts are opened. (3) Clock exerciser located in an automatic transfer switch or...