Proposed TIA Addresses Grounding Electrode Conductor Caption

Tentative Interim Amendment (TIA) Log #1479 to NFPA 70, National Electrical Code, 2020 edition, revises Sec. 800.10(B)(2). The comment closing date on this TIA is Jan. 29, 2020.

The substantiation section of this TIA notes:

“The figure 800.100(B)(2) shows a Grounding Electrode Conductor along with a Bonding Conductor for a Communications System Installation. During the revision process the Informational note was duplicated with Figure 800.100(B)(1) which does show a Bonding Conductor only Installation. This change explains that Figure 800.100(B)(2) is showing a Grounding Electrode Conductor along with a Bonding Conductor in a Communications Installation.

“The Informational Note associated with 800.100(B)(2) is reworded to reflect that there is not intersystem bonding terminal.”

It goes on to note that this TIA is of emergency nature: “The standard contains an error or an omission that was overlooked during the regular revision process.”

Note: A TIA 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 public input 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.