Also, the 2010 edition of NFPA 20 will explicitly state that you cannot convert from single to three phase. (according to an NFSA bulletin the committee has already agreed on this).
Forest Wilson Cherokee Fire -----Original Message----- From: Ron Greenman <[email protected]> To: [email protected] Sent: Wed, Aug 26, 2009 12:26 pm Subject: Re: 3 from 1 Todd, 20-A.9.2.2 in the 2007 edition. Not prohibited but not recommended. On Wed, Aug 26, 2009 at 9:12 AM, Todd Williams<[email protected]> wrote: > You may need to have an electrical engineer review the installation. > I did a single phase pump a few years ago and ran into electrical > problems (for which I was blamed). Hired an EE and he went through > and found the electrician messed up the installation from the service > right through to the pump as well as the generator feed and > connection. Didn't have a converter, but did have two transformers > because the electrician told us the wrong voltage (208 v. 240 - for > which I was also blamed). > > BTW, what section of the Code says Phase Converters are not allowed? > I couldn't find that at the time, but had rejected the idea anyway. > > > > > At 11:58 AM 8/26/2009, you wrote: >>I need some education of Phase Converters. >> >> >> >>A 300 gpm Fire Pump (Tank fed), is supplied by one of these things. Single >>phase only is available, so one of these has been installed to make it work. >>Installed in '06-07ish, just replaced main board in controller. I was there >>to do test following part replace. 240vac, dropped to 106-108 across the 3 >>as indicated on panel. Middle leg showed 422vac in event log, as high peak. >>When started, pump shaft (vertical) jumped up and down repeatedly. We red >>tagged it and are waiting on word from electricians. Pump Motor checked out >>fine. I know they are not allowed, but it was approved, so., I just test it. >> >> >> >>R/ >> >>Matt >> >> >> >>Matthew J. Willis, CET >> >>Automatic Fire Sprinklers >> >>Norred Fire Systems L.L.C. >> >>318-387-1134 Voice >> >>318-387-1163 Facsimile >> >>[email protected] >> >> >> >>_______________________________________________ >>Sprinklerforum mailing list >>[email protected] >>http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 > ______________________ _________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
