I have never had an AHJ or Underwriter require an air compressor to be on emergency power. Rationale was that the systems are not supposed be leaking to the extent that they should need it for an anticipated short period of power loss. If they are then the systems need to be tested and the leakage fixed.
The 30 minutes was the time once the system is reset and as far as being available at all times I was told that was referring to the compressor being hard wired into a live circuit, not on a switched circuit that could be turned off. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reed Roisum Sent: Thursday, July 24, 2008 1:07 PM To: '[email protected]' Subject: Air Compressor Power Supply A building (nursing home) with an emergency generator has a dry system. Is the air compressor required to be connected to the emergency generator? NFPA-13 (2007) 7.2.6.2.1,2 says that the air supply shall be from a source available at all times and shall be capable of restoring normal air pressure in the system within 30 minutes. Does this imply that yes it would be required to be connected to the em. power when available or does it just need to be an unswitched circuit? It seems as though it would be advisable for the compressor to be on the generator circuit but I want to know if it would be required. Thank you for any input and/or references. Reed A. Roisum, CET Fire Protection Technician NICET Level III Ulteig Engineers, Inc. 3350 38th Avenue South Fargo, ND 58104-7079 Direct Number: 701.280.8580 Mobile: 701.212.8810 Main Office: 701.280.8500 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
