Here's the NEC Code Section;
2017 NEC 250.104 Bonding of Piping Systems and Exposed Structural Metal. (A) Metal Water Piping. The metal water piping system shall be bonded as required in (A)(1), (A)(2), or (A)(3) of this section. (1) General. Metal water piping system(s) installed in or attached to a building or structure shall be bonded to any of the following: (1) Service equipment enclosure (2) Grounded conductor at the service (3) Grounding electrode conductor if of sufficient size (4) One or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is of sufficient size The bonding jumper(s) shall be installed in accordance with 250.64(A), 250.64(B), and 250.64(E). The points of attachment of the bonding jumper(s) shall be accessible. John Drucker, CET Acting Construction Official Fire and Electrical Subcode Official Building Inspector Building Department Borough of Red Bank, NJ Cell/Text 732-904-6823 ________________________________ From: Sprinklerforum [[email protected]] on behalf of John Drucker [[email protected]] Sent: Thursday, May 10, 2018 2:40 PM To: [email protected] Subject: RE: Grounding Electrical Wire to Sprinkler System Correct cannot be used for "GROUNDING". However per the NEC all metallic water piping including sprinkler piping is required to be "BONDED". GROUNDING = Used to connect the building electrical system to Earth. Fire Sprinkler piping including Underground, FDC's etc are not considered ground electrodes by the NEC. So they cannot be used for that purpose BONDING = To connect all metallic parts to the electrical system of the building such that these items cannot become energized resulting in the risk of electrocution Bonding allows fault current to flow through the bonding wire connection thus enabling sufficient current to flow tripping the connected circuit breaker eliminating the hazardous condition. Hope that helps. John Drucker, CET Fire and Electrical Subcode Official Building Inspector Building Department Borough of Red Bank, NJ Cell/Text 732-904-6823 ________________________________ From: Sprinklerforum [[email protected]] on behalf of JD Gamble [[email protected]] Sent: Thursday, May 10, 2018 2:31 PM To: [email protected] Subject: RE: Grounding Electrical Wire to Sprinkler System 10.5.1 2016 ed Life Safety Solutions of Sheridan JD Gamble [email protected]<mailto:[email protected]> (307) 763-3361 From: Sprinklerforum <[email protected]> On Behalf Of Mike Hairfield Sent: Thursday, May 10, 2018 12:28 PM To: Sprinkler Forum <[email protected]> Subject: Grounding Electrical Wire to Sprinkler System Where in NFPA 13 does it say that the sprinkler system can not be used to ground the electrical system? Thanks, Mike
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