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Table 50.183
# C- X+ I4 ^3 z% ~2 f& vPhysical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa6 {; Y0 z* [$ J4 |) q6 f
insulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited
" p6 I( E" N' `& N3 x2 lcircuit cable, from cable for power-limited fire-alarm circuits, and from other cables b* w( g0 H: N: z& }: D* N
! i3 A+ s, {1 `1 N5 O1 C [) e3 d
Condition of specimens at time of6 F# K+ l+ F1 K; z* M$ x8 Q
measurement
" b Z) F* r" V; p- t$ \Minimum ultimate elongation (1-inch or 25-mm
& X9 H- S, {) l2 abench marks)b: }/ l) g0 c! f% E2 P7 s1 l) x
Minimum tensile
% Q" E) F9 H! B9 k9 W: r% w6 _* Gstrengthb1 _! \; K8 A; j" d$ m/ x* \
Unaged 100 percent 3000 lbf/in2 or
7 \$ g$ c7 k d: A(1 inch or 25 mm) 20.7 MPa (MN/m2) or
M0 ~3 z4 p) n3 s/ U4 `2068 N/cm2 or
' g+ f/ h [. @% f5 f5 a2.11 kgf/mm2) K; |# Y: j0 m/ p' [
Aged in a full-draft circulating-air oven for the
; b( Z- ^' O/ T/ K4 V7 } r% qspecified timec at the specified temperaturec
5 J; v; Y( B( P- k7 W# ~70 percent of the result with unaged specimensd 70 percent of the result
" x W3 G" Z+ R# D) swith unaged specimensd
; a- h3 a1 J- W% E" Ka Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is( n- A# n! Q. P0 b2 \7 `$ r
polyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.) O% @) O- W9 B9 M* c+ \8 S% J
b Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.! j9 X* r) [2 u' h0 K+ W& E8 W
c The oven time and temperature are to be as follows:! o; `) h8 A& i$ G7 S
Temperature rating of9 H7 h. y( q6 |0 t
insulation or jacket# ^: p, f. N5 I8 S& {
Specified oven time and temperature9 T8 |' L* V0 x1 j/ w# f9 r
h °C (°F)! j# h) y+ l4 F. Z. H0 R% [, B/ @
105°C (221°F) 168 136.0 ±1.0°C+ a* p0 h# d, \( {
(276.8±1.8°F)
0 |# R$ q7 j) A$ w90°C (194°F) 168 121.0 ±1.0°C1 s7 D4 n& ~2 T+ u
(249.8 ±1.8°F)8 g+ b2 r& f9 w$ ]
75°C (167°F) 168 113.0 ±1.0°C) L0 f i L; ?& \
(235.4 ±1.8°F); Y# [/ j% _; c1 b2 b5 x( S
60°C (140°F) 168 100.0 ±1.0°C* O' a0 B1 T* H! G& M
(212.0 ±1.8°F)8 L. f& [1 i$ d( s
d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the
/ h3 @9 F9 y. T5 g+ @8 F# m- j4 q3 {, S60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire: F8 V6 `3 p1 _; x* o$ C
Standard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for
9 A$ o# i1 y, l' h2 Sretention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure% y8 y8 c! i9 M7 e5 l% V- Q, O0 H
described under ²Flexibility² as a referee test. |
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