Hospital EDG Run Time

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charlie b

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Lockport, IL
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I don't think this is an NEC issue. But I have heard of a requirement that the backup power system for a hospital must have enough fuel on site to operate for 96 hours. It is not clear whether that is based on Emergency loads (life safety and critical) or whether it includes the equipment branch. Does anyone know where this requirement is stated?
 

charlie b

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Lockport, IL
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FWIW, this project is in Washington State. I only had a few minutes this morning to look around for relevant state rules, but have not found them yet. Anyone know exactly where I should look?
 

jumper

Senior Member
Google says that that number comes from NFPA 110.

A 96-Hour Fuel Supply. Based on NFPA-110 (Standard for Emergency and Standby Power Systems), hospitals are classified as critical facilities if the seismic design category is C, D, E or F. This triggers a requirement for a minimum of 96 hours of fuel oil (storage) supply for an emergency standby power plant. While some local jurisdictions permit smaller on-premises storage capacity and only require a guarantee that their supply can be replenished within 96 hours, an on-site, four-day minimum supply for new construction is recommended. While fuel oil delivery can be ensured during normal conditions, it cannot be guaranteed in the aftermath of a Sandy-like storm or hurricane.

http://www.facilitiesnet.com/health...p-Power-Plan-For-Hospitals--14338?source=next

http://www.nfpa.org/codes-and-standards/document-information-pages?mode=code&code=110
 

gadfly56

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New Jersey
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Professional Engineer, Fire & Life Safety
IIRC, the Catch-22 here is that in many locations building codes may forbid you to store that quantity of fuel.
 
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