Do I understand that TIA 11-1 adopted by NFPA that says that if a hot tub meets the requirements in the TIA it does not require Equipotential perimeter bonding?
Of equal importance, the TIA is automatically part of the code and usable so an AHJ or enforcement agency does not have to change anything in their ordinance. Read inside the 2011 NEC cover under "Important notices......
Last edited by George Little; 03/25/1211:30 PM. Reason: miss spelling
NFPA 70® National Electrical Code® 2011 Edition Reference: 680.42(B) TIA 11-1 (SC 11-3-10/TIA Log #1005) Pursuant to Section 5 of the NFPA Regulations Governing Committee Projects, the National Fire Protection Association has issued the following Tentative Interim Amendment to NFPA 70®, National Electrical Code®, 2011 edition. The TIA was processed by Panel 17 and the National Electrical Code Technical Correlating Committee, and was issued by the Standards Council on March 1, 2011, with an effective date of March 21, 2011.
A Tentative Interim Amendment is tentative because it has not been processed through the entire standards-making procedures. It is interim because it is effective only between editions of the standard. A TIA automatically becomes a proposal of the proponent for the next edition of the standard; as such, it then is subject to all of the procedures of the standards-making process.
1. Revise 680.42(B) to read as follows: 680.42(B) Bonding. Bonding by metal-to-metal mounting on a common frame or base shall be permitted. Exception No. 1: The metal bands or hoops used to secure wooden staves shall not be required to be bonded as required in 680.26. Exception No. 2: A listed self-contained spa or hot tub that meets all of the following conditions shall not be required to have equipotential bonding of perimeter surfaces installed as required in 680.26(B)(2): (1) Is installed in accordance with manufacturer’s instructions on or above grade. (2) The vertical measurement from all permanent perimeter surfaces within 30 horizontal inches (76 cm) of the spa to the top rim of the spa is greater than 28 inches (71 cm). Informational Note: For further information regarding the grounding and bonding requirements for self-contained spas and hot tubs, see ANSI/UL 1563 – 2009, Standard for Electric Spas, Equipment Assemblies, and Associated Equipment. Issue Date: March 1, 2011 Effective Date: March 21, 2011
As for how it affects your codes, I suppose that depends on the language of the law that adopts it.
Greg- My point was that for the first time that I'm aware of, the code inside the first page of the '11 edition tells us that a TIA is to be looked at the same way we look an an errata or correction of the code. What's your understanding of it?
That seems to be what the note at the top of the TIA says too although they say it will be rolled into a proposal at the next cycle. (one that is a slam dunk to pass I imagine).
I think it would still fall back on what your adoption language says. In the end, you are still the AHJ.
FYI for those who haven't seen it
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