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Table 50.183) s! y$ P1 Q1 J6 L4 g" e( V
Physical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa
5 i4 E# b4 p/ r' {7 hinsulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited9 m6 e4 M1 ^8 V3 r+ o- ~- h
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables
2 N1 i6 _5 z, u W$ j9 ?7 s: ~1 i) Q! Z5 c) \
Condition of specimens at time of
* |' m9 Q4 i) o) {% rmeasurement
: r4 O# \. ~& hMinimum ultimate elongation (1-inch or 25-mm
& R9 w% Q4 B9 E S0 Wbench marks)b
: h8 Q+ {! c% x* u4 d; KMinimum tensile
4 ~2 q2 a) O- h: m) _strengthb# f% B6 v/ k3 J! p* C# c) f
Unaged 100 percent 3000 lbf/in2 or' p: f. H" q" G# \4 x
(1 inch or 25 mm) 20.7 MPa (MN/m2) or3 D' b# |$ y3 _+ }
2068 N/cm2 or
f6 _ K' L' L- t+ b1 ~2.11 kgf/mm2! R9 q8 b3 b/ ?% D. R
Aged in a full-draft circulating-air oven for the
4 u% H$ n" d- Kspecified timec at the specified temperaturec
- ~' v. L d" E- U: R+ U$ p4 H70 percent of the result with unaged specimensd 70 percent of the result
! }7 q4 ]% _5 T! e- B4 V0 owith unaged specimensd
3 J% D, g+ M0 `a Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is
; z0 G$ y. Z" K: l( s9 Lpolyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.
7 ^, y- S* x# X/ t. i( ^b Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.4 G. |& x, T& n( y8 m& W
c The oven time and temperature are to be as follows:
8 s9 c) [" n) j. q! [Temperature rating of
" i" w. H1 e7 ~7 Tinsulation or jacket4 }$ o+ Z! p, M, C7 @0 c
Specified oven time and temperature1 i( A: ~9 R! I- K2 ]( {
h °C (°F)3 B# J' R6 O$ V% J
105°C (221°F) 168 136.0 ±1.0°C; V% |' v4 N4 ?/ d$ a5 [
(276.8±1.8°F)% W ]% Z# T5 S) k0 v/ C
90°C (194°F) 168 121.0 ±1.0°C
: k$ E+ s& u, z+ L: z, ? n* O(249.8 ±1.8°F)8 ?1 S% y" f1 I7 ]3 v9 c5 [, Y
75°C (167°F) 168 113.0 ±1.0°C
4 _5 b; Q1 X+ n( l, t9 Q" U(235.4 ±1.8°F)
0 T9 S2 e) M) n6 V60°C (140°F) 168 100.0 ±1.0°C: ?" Z! Y/ L. {) z2 {. v* _! d
(212.0 ±1.8°F)' r; \3 w, r# E& c
d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the; i8 f3 @1 p) P7 A5 }- ^1 U
60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire- F+ O5 K9 o: P( Q0 o! p; q5 Y
Standard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for
, C! O; N) F4 M T0 }retention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure
6 Y/ r) |* a: e. M- ?5 Wdescribed under ²Flexibility² as a referee test. |
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