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Table 50.183
. K# s1 u6 I9 |1 @" P5 S. kPhysical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa
& ?8 N( A/ x8 T( u2 Uinsulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited4 g- p( ^" e, ?; ~( l
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables
- A/ U# @" m9 c* @1 I) z7 D$ v) O! H2 ?6 |0 g8 k& _0 D
Condition of specimens at time of, E4 u" Z$ F$ p1 m7 e& F
measurement
6 _) [- L! P0 CMinimum ultimate elongation (1-inch or 25-mm# x2 w h+ N8 N# J
bench marks)b
$ z' \8 w* Q9 x7 L8 y* YMinimum tensile
" u" A( l. c7 Estrengthb' }- w1 f9 I3 M! c J% `! _! l
Unaged 100 percent 3000 lbf/in2 or" P6 o! y5 b+ j
(1 inch or 25 mm) 20.7 MPa (MN/m2) or" N! t. r3 d( c: B
2068 N/cm2 or
. K7 f+ k8 E5 q9 Q6 p6 F2.11 kgf/mm2/ j6 d( u4 ? \
Aged in a full-draft circulating-air oven for the
' k0 C) L; W* T# X* i' |specified timec at the specified temperaturec9 h. p! j7 L2 u' k: C" q0 H
70 percent of the result with unaged specimensd 70 percent of the result
5 k0 b7 E+ |2 {( ]9 Kwith unaged specimensd
8 k7 c+ d9 ^9 ia Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is/ `( G9 N" p, R* L8 I- w
polyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.
5 G$ O) ~& [) L/ Nb Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.3 i5 ~: l6 m/ X' x8 v7 l' ?1 y' P
c The oven time and temperature are to be as follows:
! z8 C( Y& O; Z; LTemperature rating of
+ s: p, U# e' |7 W Xinsulation or jacket
?. b% K) ^! bSpecified oven time and temperature
8 ~+ y9 B# l4 T+ y4 @, ~8 J- Fh °C (°F), V4 ?0 }+ F# p% s5 A3 ]) c* a
105°C (221°F) 168 136.0 ±1.0°C
- e& X' _) u, I& H n(276.8±1.8°F)5 l/ @: F: e& p/ k, J5 ]
90°C (194°F) 168 121.0 ±1.0°C% [& A% g3 p7 k
(249.8 ±1.8°F)) P2 `- H( w! w' y
75°C (167°F) 168 113.0 ±1.0°C" t' A& \& {* r
(235.4 ±1.8°F)
: N) N' ^3 l+ n0 C& C, J5 s: Z- n60°C (140°F) 168 100.0 ±1.0°C3 m& ~ j {8 \& A1 q
(212.0 ±1.8°F)
( U m2 u" v) m1 L L8 |; `d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the
- F: }1 P, \7 X. y# a, B5 X60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire* d" C& b# L' Y6 J8 W0 t# e2 O
Standard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for
9 [% H* U- P$ @% K' c- F% _( I! mretention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure8 T" y0 h# i( Y2 b- ]
described under ²Flexibility² as a referee test. |
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