Energy Storage Systems Outdoor Installation Requirements

The ESS is installed on electric utility property = Condition (1) The ESS is installed in a dedicated use ESS building as defined in section 4.4.2.2 = Condition (2) There is controlled access to the property provided by fencing, locked facilities, or manned guard stations = Condition (3) There is restricted access to first responders according to the emergency response plan utilized by the electric utility for high voltage facilities = Condition (4)

ESS installed indoors, outdoors, on rooftops, and in open parking garages = Section 4.4.1 ESS facilities under exclusive control of the electric utility meeting specific conditions = Section 4.4.1.1

Local fire alarm annunciation provided and trained personnel always present = When approved, alarm signals are not required to be transmitted to an approved location Referring to NFPA 850 Chapter 4 for appropriate fire protection design process = Electric utilities should refer to NFPA 850 Chapter 4 for a comprehensive evaluation of risks posed by ESS

<p>Lot lines = 10 feet Public ways = 10 feet Buildings = 10 feet Stored combustible materials = 10 feet</p> Signup and view all the answers

<p>Clearances to buildings = 3 ft. (914.4 mm) Enclosures of noncombustible materials = 3 ft. (914.4 mm) ESS enclosure fire testing compliance = 3 ft. (914.4 mm) Weatherproof enclosure construction materials = 3 ft. (914.4 mm)</p> Signup and view all the answers

<p>Indoor ESS installations = 4.4.2 Outdoor ESS installations near exposures = 4.4.3.2 (2) Open parking garages ESS installations = 4.4.4.2 Rooftops of buildings ESS installations = -</p> Signup and view all the answers

<p>Indoor ESS installations = - Outdoor ESS installations near exposures = - Open parking garages ESS installations = - Rooftops of buildings ESS installations = Table 4.5</p> Signup and view all the answers

<p>Section 4.6.2 ESS = Maximum energy level of 250 kWh Section 4.6.3 = Minimum spacing of 3 ft. from other ESS groups and walls Section 4.6.4 = AHJ approval for larger capacities or smaller group spacing based on fire testing Section 4.6.5 = Exemption for lead-acid and nickel-cadmium battery systems in telecommunications facilities</p> Signup and view all the answers

<p>ESS groups in non-dedicated use buildings = Comply with high hazard requirements as per NFPA 101 ESS exceeding maximum rated energy values = Comply with applicable high hazard requirements Lead-acid and nickel-cadmium battery systems = Exempt from Sections 4.6.2 and 4.6.3 Pre-engineered and prepackaged ESS groups = Approval based on large-scale fire testing</p> Signup and view all the answers

<p>Listed pre-engineered and prepackaged ESS groups = Fire involving one array will not propagate to adjacent array Large capacities or smaller group spacing = Fire resistance rating of the room separation required by 4.4.2.1 Witnessed fire and fault condition testing by approved testing laboratory = Contain fire within room for duration equal to fire resistance rating</p> Signup and view all the answers