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Table 50.183
6 i( R7 _# v! m$ yPhysical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa
$ i8 J5 a/ i: Cinsulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited7 a( `/ B+ ^! e' o% l' c0 S$ ?
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables
; u7 D# A! m1 y& L. f( F. |7 R8 L* t6 g% R4 ~
Condition of specimens at time of
8 ?8 [& W4 V( G. o0 t6 p9 v0 s, ^* W* T/ ^measurement: O p0 R' Q2 G" L+ V' b
Minimum ultimate elongation (1-inch or 25-mm
3 {$ i' K- O& Y4 P% gbench marks)b
8 b- L9 z Y2 _9 P7 c. sMinimum tensile* l! v% C8 K( _
strengthb
8 k0 ^& i4 n2 C: Y* }; h. f. cUnaged 100 percent 3000 lbf/in2 or
0 F5 o. a" x7 g# _2 w* o(1 inch or 25 mm) 20.7 MPa (MN/m2) or
8 j" P5 x2 ~3 w t2068 N/cm2 or
! P8 Z3 |: X, H4 l0 \/ j! y! f! u+ ~+ y2.11 kgf/mm2: \, `& ^- j( f# Y; V# V
Aged in a full-draft circulating-air oven for the
. V/ Z9 \! ?" S/ Fspecified timec at the specified temperaturec
$ Y7 ^: Q O1 l3 H, l" L+ e70 percent of the result with unaged specimensd 70 percent of the result; I* E/ j8 i* `9 z1 g
with unaged specimensd
9 w0 N6 L5 U3 Y6 k- Ba Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is' D' ]& C+ P) h& }. S0 F/ M, |6 a6 O7 _
polyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.
& m) L- x1 f) _1 M- n& M7 yb Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.
# ?# H X0 a8 r) T5 {c The oven time and temperature are to be as follows:+ s- i! y8 ~) z) j" C
Temperature rating of
1 i/ u9 Y( y, Kinsulation or jacket8 U4 u" z' l* C$ D6 [: ]* ^
Specified oven time and temperature( ^, ]' G7 W" N; C9 R
h °C (°F)6 z4 ?; x! Q: B
105°C (221°F) 168 136.0 ±1.0°C0 a0 x* y8 H8 {. l$ P- Z- c# s! Z
(276.8±1.8°F)
, K- K# B2 C5 G0 `90°C (194°F) 168 121.0 ±1.0°C" g% P, {9 R$ n: F: J2 n& a
(249.8 ±1.8°F)
8 b9 G# j1 M" M; v/ q9 R75°C (167°F) 168 113.0 ±1.0°C
! `: L, O w, p% L(235.4 ±1.8°F)5 s& L, F4 p) g! y3 u
60°C (140°F) 168 100.0 ±1.0°C/ B2 d2 Q* @. F: W( X
(212.0 ±1.8°F)0 Q9 |1 h6 v( o! W/ o3 N
d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the
( | q' l2 n* Z( ?7 E. l. e; J60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire
- J& Q& f9 o& E) g$ kStandard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for
9 X, ?, k" B/ [( uretention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure' r% ?/ i9 t" Q& L* N& i2 a6 w
described under ²Flexibility² as a referee test. |
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