I agree, but to what should the ground/bonding wire from the riser be connected?
On Wed, Jan 28, 2009 at 8:48 AM, John Drucker <[email protected]>wrote: > Ed, > > In my professional opinion I would say the riser after any backflow > devices, fire pumps, alarm and check valves, i.e. items that are > expected to be removed for repair or replacement, however the code does > not stipulate this. In all cases the electrical engineer and local > inspector are to be consulted. > > Hope that helps. > > John Drucker > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ed Vining > Sent: Wednesday, January 28, 2009 11:13 AM > To: [email protected] > Subject: Re: FW: Grounding, Bonding and Sprinkler Piping > > John, what do you consider an appropriate place(s) to connect the > sprinkler piping to ensure a reliable connection to ground? Just > connecting it to the nearest piece of metal might not suffice. > . > Ed Vining > > > On Wed, Jan 28, 2009 at 4:48 AM, John Drucker > <[email protected]>wrote: > > > Subject: Grounding, Bonding and Sprinkler Piping > > > > > > >From an industry forum list (AFAA Firealarm). Apparently NFPA-25 > > inspectors > > (contractors) are either removing the bonding connection and or noting > > > it as a violation................................ > > > > John > > > > ---------------------------------------------------------------------- > > ---- > > > > From: John Drucker <[email protected]> > > Subject: RE: [firealarm] Ground Rod Questions > > > > All interior water piping within a building, including metallic fire > > sprinkler piping is required to be bonded pursuant to 2008 NEC > > 250.104(A)(B) > > . > > > > Failure to bond a metallic piping system could result in the piping > > system becoming energized with the potential of shock or > > electrocution. Bonding merely places all metallic components within a > > building at equipotential.These components, water piping, gas piping, > > building steel, etc are bonded (electrically connected together) to > the electrical system. > > A > > properly bonded system assures a low impedance electrical path exists > > should a fault occur producing the needed fault current in order to > > operate a circuits overcurrent device thus clearing the fault by > > deenergizing the circuit. > > > > Grounding on the other hand is the connection of the buildings > > electrical system to earth in order to dissipate lighting, transients > > and stabilize system voltage. Grounding is not Bonding. The sprinkler > > piping prohibition applies to the use of fire sprinkler piping as a > > Grounding electrode. Its important that we not remove bonding jumpers > > from aboveground fire sprinkler piping. If you're not sure consult > > with your electrical inspector. In the end it might just save > > someone's life ! > > > > Sincerely, > > > > John Drucker > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: > [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > > 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 > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > -- Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
