where ENT is placed on sand or approved screenings, provided fittings identified for this purpose are used for connections.
(7) For wet locations indoors as permitted in this section or in a concrete slab on or belowgrade, with fittings listed for the purpose.
(8) Metric designator 16 through 27 (trade size V2 through 1) as listed manufactured prewired assembly.
FPN: Extreme cold may cause some types of nonmetallic conduits to become brittle and therefore more susceptible to damage from physical contact.
362.12 Uses Not Permitted. ENT shall not be used in the following:
(1) In any hazardous (classified) location, except as permitted by other articles in this Code
(2) For the support of luminaires and other equipment
(3) Where subject to ambient temperatures in excess of 50°C (122°F) unless listed otherwise
(4) For conductors or cables operating at a temperature higher than the ENT listed temperature rating
Exception to (4): Conductors or cables rated at a temperature higher than the ENT listed temperature rating shall be permitted to be installed in ENT, provided
they are not operated at a temperature higher than the
ENT listed temperature rating.
(5) For direct earth burial
(6) Where the voltage is over 600 volts
(7) In exposed locations, except as permitted by
362.10(1), 362.10(5), and 362.10(7)
(8) In theaters and similar locations, except as provided in 518.4 and 520.5
(9) Where exposed to the direct rays of the sun, unless identified as sunlight resistant
(10) Where subject to physical damage
362.20 Size.
(A) Minimum. ENT smaller than metric designator 16 (trade size Vi) shall not be used.
(B) Maximum. ENT larger than metric designator 53 (trade size 2) shall not be used.
FPN: See 300.1(C) for the metric designators and trade sizes. These are for identification purposes only and do not relate to actual dimensions.
362.22 Number of Conductors. The number of conduc- tors shall not exceed that permitted by the percentage fill in Table 1, Chapter 9.
Cables shall be permitted to be installed where such use is not prohibited by the respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9.