2023 NEC 334.15(B) Changes for NM Cable - Protection From Physical Damage

[jar546]

Here is some new language:

(B) Protection from Physical Damage.
Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, RTRC marked with the suffix -XW, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, RTRC marked with the suffix -XW, or other approved means extending at least 150 mm (6 in.) above the floor. Conduit or tubing shall be provided with a bushing or adapter that provides protection from abrasion at the point the cable enters and exits the raceway.

Type NMC cable installed in shallow chases or grooves in masonry, concrete, or adobe shall be protected in accordance with the requirements in 300.4(F) and covered with plaster, adobe, or similar finish.

 

[steveray]

or other approved means extending at least 150 mm (6 in.) above the floor.

This is what i honed in on....Thats some big nailplates...

 

[wwhitney]

This is what i honed in on....Thats some big nailplates...

NEC 334.15 is "Exposed Work", so the part about passing through the floor would not apply to within a framed wall that is to be enclosed.

Cheers, Wayne

 

[steveray]

Thanks Wayne (and JAR)....In your opinion, does this "stack" with 334.23 (which sends you to 320.23) or because that is specific to attics, that governs?

320.23 In Accessible Attics.​

Type AC cables in accessible attics or roof spaces shall be installed as specified in 320.23(A) and (B).

(A) Cables Run Across the Top of Framing Members.​

Where run across the top of framing members, or across the face of rafters or studding within 2.1 m (7 ft) of the floor or horizontal surface, the cable shall be protected by guard strips that are at least as high as the cable. Where this space is not accessible by permanently instal⁠led stairs or ladders, protection shall only be required within 1.8 m (6 ft) of the nearest edge of the scuttle hole or attic entrance.


There is still "where necessary" and "other approved means" so that helps...