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Table 50.183
9 J4 l5 z. ?# ]+ P8 r& uPhysical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa; s3 L) H9 {8 ^
insulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited! R. B0 q0 h: O9 m4 r
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables
+ U9 {& w4 Z, U8 }1 J
, I7 K+ ^" `" @6 yCondition of specimens at time of3 B8 q+ W, c+ }2 ~' B: R4 b
measurement, h7 y# ]2 w4 k8 z* ^3 y/ m0 i
Minimum ultimate elongation (1-inch or 25-mm) _, q# {; a7 v; @, G0 O6 Y) y3 N T: |
bench marks)b
( ~ ]' w8 J: @% F+ a; uMinimum tensile
) f2 o; Y; m# N5 Estrengthb
0 e5 Z" S0 \- [Unaged 100 percent 3000 lbf/in2 or
* J# I6 J. e+ r(1 inch or 25 mm) 20.7 MPa (MN/m2) or
! q; W, z, A+ ?9 A9 m) w2068 N/cm2 or
% [5 M3 M1 `; u: \4 B2.11 kgf/mm2
, O0 K. E( F- y1 u& R+ p( s5 wAged in a full-draft circulating-air oven for the' R' J: q- s# |& H$ k
specified timec at the specified temperaturec
4 D% a3 p& ]5 v* I; R70 percent of the result with unaged specimensd 70 percent of the result
! v" e2 ]1 q% c+ e* U) u4 rwith unaged specimensd
& t5 e) G. c4 S t8 Qa Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is
! i) T9 ~ N9 d0 l9 ^, Apolyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.
2 D6 y1 A9 M9 C2 B4 cb Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.
% @9 E# H; k2 _% X! |" k/ fc The oven time and temperature are to be as follows:
- o1 k" f0 N( O# l" xTemperature rating of
8 }1 ?4 y% z9 p0 B! `+ zinsulation or jacket
9 P' u3 ^) R! RSpecified oven time and temperature- g0 H% ]* a! T+ R" W
h °C (°F)
- Y5 i6 n# j% m1 O) T" O105°C (221°F) 168 136.0 ±1.0°C5 ] E" A _- ^! r5 v+ i8 c
(276.8±1.8°F)% J. f' t! n/ F, |/ Z# c: `8 {, ?
90°C (194°F) 168 121.0 ±1.0°C" t ?. {" I! s) H6 ^# ~" U7 a
(249.8 ±1.8°F)5 s3 V' D+ h# K) w$ H0 r
75°C (167°F) 168 113.0 ±1.0°C
" Z( a" f! `2 w5 c9 J(235.4 ±1.8°F)
, J) }6 F$ D$ }9 b60°C (140°F) 168 100.0 ±1.0°C, i; s& q6 e; }, Y) h6 R
(212.0 ±1.8°F); `. R, H# ~# o5 q8 h; ^1 |
d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the: v6 e5 Y& l: l! Z" g3 X
60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire ^3 s. o8 t/ N/ h. L
Standard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for( H! F" {; U0 Y T7 _4 @
retention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure2 L2 n. C3 R- C& T# M( u( ?* n3 a/ K
described under ²Flexibility² as a referee test. |
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