Depends. Where does that wire terminate in the sub-panel? If I'm not mistaken the terminal bar for a bond must be bonded to the panel and the terminal bar for a ground must be isolated except in the main panel(s).
On Thu, Dec 5, 2013 at 2:23 PM, Brandon Hunsinger < [email protected]> wrote: > Thanks for the feedback do far. I am gaining a better understanding of > it... > A surgery room in a hospital where it appears most of the pipes above > the ceiling are bonded or grounded with wire attached to a clamp attached > to the pipe back to an elec panel in the wall of the same room... Is this > allowed? > > Columbus Automatic Sprinkler, Brandon Hunsinger > 706 358 2535 > > > > On Dec 5, 2013, at 4:55 PM, "John Drucker" <[email protected]> > wrote: > > > > Hence why some in the electrical sphere of influencing want to change > > the term to "earthing" here in the colonies, yep earthing. > > > > Article 250 of the NEC is most likely the most misunderstood section of > > the code, guess that's why guys like soares, iaei and the like publish > > books 3/4" thick on the topic, add in Ufer grounds (concrete encased > > electrodes), csst bonds (gas tubing) , isolated grounds (the orange > > receptacles) with a sprinkle of derived sources (generators that break > > the neutral on transfer) and finished with fault currents (what it takes > > to open the breaker) and heads start a spinning, reminiscent of the > > engineer of the silver strings submarine band who smashes all the fuses > > in the panelboard with a hammer. > > > > But in a nutshell; > > > > Bonding = Connect all (which includes pipes) the different metal stuff > > together with straps, screws, bolts, fittings or jumpers. The whole > > idea is that if an energized conductor (hot wire) makes contact with the > > metal stuff sufficient current (fault current) will flow back to the > > (source) panelboard overcurrent device (fuse or circuit breaker) and > > trip it deenergizing the circuit instantly. > > > > Grounding = Connect it to earth. Typical DIP Fire Service undergrounds > > DO NOT COUNT as a grounding electrode pursuant to the NEC which clearly > > defines them and DIP isn't one (please don't anyone make the mistake of > > one of our tired posters and ask about PVC and CPVC). A sharp > > electrical inspector will say hey it looks good but it doesn't count. > > The idea here is to provide a reference to stabilize voltage and provide > > a bleed path for lightning. In order to do that the pipe metal MUST be > > in DIRECT contact with earth and the DIP coating prevents that. > > > > Hope that helps, happy electrons to all. > > > > John > > > > John Drucker, CET > > Assistant Construction Official > > Fire Protection Subcode Official > > Building/Fire/Electrical Inspector > > Borough of Red Bank, New Jersey > > Office: 732-530-2760 X 331 > > Cell/Text: 732-904-6823 > > Email: [email protected] > > http://www.redbanknj.org > > > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of > > Taylor, Galen > > Sent: Thursday, December 05, 2013 4:32 PM > > To: [email protected] > > Subject: RE: Grounding > > > > Think about ... grounding is a term used for "earth" on old electrical > > diagrams. An electrical system is not "grounded" unless it goes to > > earth. And if you're talking about fire sprinkler piping, it's not > > permitted to be used for electrical grounding. > > > > Galen Taylor > > County of Los Angeles Fire Department > > Fire Prevention Engineering > > 323-890-4339 > > [email protected] > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of > > Brandon Hunsinger > > Sent: Thursday, December 05, 2013 1:22 PM > > To: [email protected] > > Subject: Grounding > > > > Can aboveground piping be used for grounding or bonding electrical > > systems. I see where underground pipe can be used for bonding but not > > grounding... > > > > Columbus Automatic Sprinkler, Brandon Hunsinger > > 706 358 2535 > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler > > .org > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler > > .org > > > > > > CONFIDENTIAL AND PROPRIETARY: > > This email message is intended only for the use of the individual or > entity to which it is addressed and may contain information that is > privileged and confidential, nor is it, unless specifically stated, > intended to be relied upon by any person or persons other than the > individual or entity named above and no warranties or representations are > made or intended to persons or entities not named above. If the reader is > not the intended recipient, you are hereby notified that any dissemination, > distribution or copying of this communication is strictly prohibited. If > you have received this communication in error, please notify us immediately > by telephone, return this message to the address above and delete all > copies. Thank you. > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
