7-88 Log #2639 NEC-P07 Final Action: Accept
Submitter: James M. Daly, General Cable
Recommendation: Delete the phrase ?excluding 334.80? and change the
comma after ?Article 334? to a period.
Substantiation: When Type SE conductors are used for interior wiring, as a
replacement for Type NM cable, the ampacity of the conductors should be the
same as permitted for NM cable since the insulations used are the same both
NM and SE conductors.
Panel Meeting Action: Accept
Panel Statement: This action will modify the action taken on Proposal 7-84.
Number Eligible to Vote: 14
Ballot Results: Affirmative: 14
334.80. Delete the second paragraph and revise the first paragraph to read as follows:
334.80 Ampacity. Type NM, NMC, and NMS cable shall have conductors rated at 90/C (194/F).
Where installed in thermal insulation, the ampacity of conductors shall be that of 60/C (140/F)
conductors. The ampacity of Types NM, NMC, and NMS cable installed in cable tray shall be
determined in accordance with 392.11.
338.10(B)(4)(a). Identify the existing fine print note as FPN No. 1, and add a second fine print note as
FPN No. 2: This section includes service entrance cables with a round configuration commonly
known as SER cable. The interior installation of this cable is governed by the same rules as apply
to nonmetallic sheathed cable.