temperature rating shall be permitted to be installed in PVC conduit, provided they are not operated at a temperature higher than the PVC conduit listed temperature rating.

(F) Theaters and Similar Locations. In theaters and similar locations, except as provided in 518.4 and 520.5.

352.20 Size.

(A) Minimum. PVC conduit smaller than metric

designator 16 (trade size Vi) shall not be used.

(B) Maximum. PVC conduit larger than metric designator 155 (trade size 6) shall not be used.

FPN: The trade sizes and metric designators are for identification purposes only and do not relate to actual dimensions. See 300.1(C).

352.22 Number of Conductors. The number of conduc- tors shall not exceed that permitted by the percentage fill specified 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.

352.24 Bends — How Made. Bends shall be so made that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Field bends shall be made only with bending equipment identified for the purpose. The radius of the curve to the centerline of such bends shall not be less than shown in Table 2, Chapter 9.

352.26 Bends — Number in One Run. There shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points, for example, conduit bodies and boxes.

352.28 Trimming. All cut ends shall be trimmed inside and outside to remove rough edges.

352.30 Securing and Supporting. PVC conduit shall be installed as a complete system as provided in 300.18 and shall be fastened so that movement from thermal expansion or contraction is permitted. PVC conduit shall be securely fastened and supported in accordance with

352.30(A) and (B) or permitted to be unsupported in
accordance with 352.30(C).

(A) Securely Fastened. PVC conduit shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, conduit body, or other conduit termination. Conduit listed for securing at other than 900 mm (3 ft) shall be permitted to be installed in accordance with the listing.

(B) Supports. PVC conduit shall be supported as required in Table 352.30. Conduit listed for support at spacings other than as shown in Table 352.30 shall be permitted to be installed in accordance with the listing.

Horizontal runs of PVC conduit supported by openings through framing members at intervals not exceeding those in Table 352.30 and securely fastened within 900 mm (3 ft) of termination points shall be permitted.
Table 352.30 Support of Rigid Polyvinyl Chloride Conduit
(PVC)
Maximum Spacing Between
Conduit Size Supports

Metric

Designator Trade Size mm or m ft

16-27 ■/2-1 900 mm 3

35-53 1 '/4-2 1.5 m 5

63-78 2'/2-3 1.8 m 6

91-129 3'/2-5 2.1 m 7

155 6 2.5 m 8

(C) Unsupported Raceways. Where oversized, concentric or eccentric knockouts are not encountered, PVC conduit shall be permitted to be unsupported where the