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Table 50.183
6 h" K' w, S( L8 \& UPhysical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa
/ ~" r' W& W+ @' H- K" dinsulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited1 a' m* @" e- I. t2 M9 \: o
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables
+ r# l! ~! i1 D7 m9 y
' m- F! l: u' g; v7 k3 qCondition of specimens at time of
& n1 H/ q" i" i3 ~# Omeasurement6 n. }$ u1 G! S, k _
Minimum ultimate elongation (1-inch or 25-mm2 n: ~8 _& I7 ?# A* i4 r L; d! c
bench marks)b
9 ^( W# V% @% a. ]Minimum tensile0 s$ n7 [9 b8 O/ }% t5 T
strengthb
2 B0 q3 l% V7 X" C5 ~8 Q/ aUnaged 100 percent 3000 lbf/in2 or
1 d" Y2 t7 V2 Y0 ^& ~( o" g& n(1 inch or 25 mm) 20.7 MPa (MN/m2) or; ^7 m$ r% y; n
2068 N/cm2 or* B" s9 M2 g* z7 s" _ ]" a. ]' T
2.11 kgf/mm2! ~* ^1 T. T; X) e
Aged in a full-draft circulating-air oven for the, v) U# R- G! A6 }; b4 e: h* l
specified timec at the specified temperaturec
! E* f% D7 M% t70 percent of the result with unaged specimensd 70 percent of the result
2 z8 w: i; n! i, x' \+ ywith unaged specimensd
& j5 H$ a7 L" C- E7 f9 J8 Da Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is- \3 e( o$ n+ @' p, b
polyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.
7 S. N1 i) O7 e& n3 P' ]4 tb Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.8 u7 R0 ^+ E$ S
c The oven time and temperature are to be as follows:- M4 ?- g2 {1 U( ]# a
Temperature rating of1 H" D3 I }& n; H( ~2 d
insulation or jacket1 [$ t$ [* @, Z5 Q( ?9 I4 K7 x
Specified oven time and temperature
0 W# @5 |! D. a% a3 uh °C (°F)
1 ~' N, D% {' _105°C (221°F) 168 136.0 ±1.0°C" i# |( d, K7 V% b
(276.8±1.8°F)
- ]2 M: e/ X% e1 i+ N90°C (194°F) 168 121.0 ±1.0°C. Q. Y/ \& c2 r% d t4 x1 ?8 J- T
(249.8 ±1.8°F)4 s- A7 K8 j0 j% I& \
75°C (167°F) 168 113.0 ±1.0°C
3 U/ o8 l6 H9 q(235.4 ±1.8°F)' G' @% d6 I8 a
60°C (140°F) 168 100.0 ±1.0°C8 P6 S6 ~% A9 q3 Y; T. d4 M; P
(212.0 ±1.8°F); Q$ g# q5 g) N3 Y, `
d As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the. d, ?7 F, q" n! p& n
60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire
$ W! \; m3 j Y# V) q1 M, mStandard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for
: [3 w5 D3 c2 @3 T0 rretention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure' l8 q. I p Z9 x
described under ²Flexibility² as a referee test. |
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