LFNC Not Permitted scenarios

pv_n00b said:

It's strange but it is an AHJ call. Neither "physical damage" or "severe physical damage" are defined in the NEC. It's the kind of thing I would have a discussion with the AHJ over to see if I can find out what the actual concern is. Right now they are giving their solution to their concern, but not sharing their concern. Usually in a case like this if you know what the concern is you can talk them back from the ledge.

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That is intentional as the term "physical damage" is used with multiple wiring methods. Based on the rule in 334.15(B), I would require protection for the NM in locations that I would not require protection for schedule 40 PVC, yet the PVC is not permitted to be installed in locations where it would be subject to physical damage.
This is a subjective rule intended to permit the inspection authority to use some judgement.

Right now there are a lot of areas that I would prohibit NM without additional protection, but in the 70s or 80s I would have permitted the NM in those areas because of the huge difference in the jacket used back then was much more resistant to physical damage.

That is intentional as the term "physical damage" is used with multiple wiring methods. Based on the rule in 334.15(B), I would require protection for the NM in locations that I would not require protection for schedule 40 PVC, yet the PVC is not permitted to be installed in locations where it would be subject to physical damage.This is a subjective rule intended to permit the inspection authority to use some judgement.Right now there are a lot of areas that I would prohibit NM without additional protection, but in the 70s or 80s I would have permitted the NM in those areas because of the huge difference in the jacket used back then was much more resistant to physical damage.

356.10 Uses Permitted.

LFNC shall be permitted to be used in exposed

locations in lengths not to exceed 1.8m (6 feet)

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or concealed locations

where encased in concrete

for the following purposes:

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