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
