350.10 LFMC uses
What changed in 350.10
LFMC is now allowed simply where flexibility or protection is wanted, machine oils were added to the list, and a new item covers conductor temperature ratings. LFNC got matching changes.
Point by point
- Item (1) now reads as a choice: use LFMC where flexibility or protection is desired, not only where conditions require it.
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Get the whole breakdown
- 4 more points on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
- What to do and check on the job
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This section across NEC® editions
2020 NEC®RevisedYou're here
LFMC is now allowed simply where flexibility or protection is wanted, machine oils were added to the list, and a new item covers conductor temperature ratings. LFNC got matching changes.
2023 NEC®No change
This section did not change from 2020 to 2023.
2026 NEC®Revised
Liquidtight flexible metal conduit can now be encased in concrete when it's listed and marked for direct burial.
Open the 2026 page →More 2020 changes in Article 350
This is a plain-English summary, not the NEC®'s exact wording. Always check the full section in the NEC® edition your area has adopted, plus any local amendments.
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