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356.10 Uses Permitted
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LFNC shall be permitted to be used in exposed or concealed locations for the following purposes:
- Where flexibility is required for installation, operation, or maintenance.
- Where protection of the contained conductors is required from vapors, machine oils, liquids, or solids.
- For outdoor locations where listed and marked as suitable for the purpose.
- For direct burial where listed and marked for the purpose.
- Type LFNC shall be permitted to be installed in lengths longer than 1.8 m (6 ft) where secured in accordance with 356.30.
- Type LFNC-B as a listed manufactured prewired assembly, metric designator 16 through 27 (trade size 1/2 through 1) conduit.
- For encasement in concrete where listed for direct burial and installed in compliance with 356.42.
- Conductors or cables rated at a temperature higher than the listed temperature rating of LFNC conduit shall be permitted to be installed in LFNC, provided the conductors or cables are not operated at a temperature higher than the listed temperature rating of the LFNC.
Informational Note: Extreme cold can cause some types of nonmetallic conduits to become brittle and therefore more susceptible to damage from physical contact.
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