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Table 50.1831 R' ^5 [8 H9 L! P/ V
Physical properties of 105°C (221°F), 90°C (194°F), 75°C (167°F), and 60°C (140°F) semirigid PVCa
2 I& u- t4 l6 Q1 Ninsulations and 75°C (167°F) and 60°C (140°F) jackets from CATV cables, from power-limited& o- s. k9 f8 |+ [1 Q1 }5 F
circuit cable, from cable for power-limited fire-alarm circuits, and from other cables, y* R0 K6 l/ [$ Y* G1 p7 c0 _# P
4 c! h4 T1 m+ I7 R4 _! S
Condition of specimens at time of
- _3 C5 \% J8 t. }7 z% l4 Dmeasurement
7 H8 K* L4 R; h5 l. wMinimum ultimate elongation (1-inch or 25-mm
8 q1 @+ P& J; i6 g( ibench marks)b
& g( @" s( V/ Q# ~ LMinimum tensile
2 {$ z+ J9 X1 G8 h9 \$ L. ustrengthb6 i5 l6 X& {* y+ Z
Unaged 100 percent 3000 lbf/in2 or/ S" E3 K7 t0 G( ?" x! K' O* M
(1 inch or 25 mm) 20.7 MPa (MN/m2) or$ V1 c. l M& H- X3 _. M8 E
2068 N/cm2 or
1 _6 H% b5 N" Y5 R2.11 kgf/mm2
$ p6 {. _: ], H# H$ n0 J# l3 D+ u$ iAged in a full-draft circulating-air oven for the8 [; ]$ Q$ c6 U
specified timec at the specified temperaturec
; z! \/ Q. D) A$ J/ h2 t+ A70 percent of the result with unaged specimensd 70 percent of the result6 u) s! L+ U! z0 k! m" l' Z1 {4 K
with unaged specimensd
% q5 M$ K- d Ra Semirigid PVC (SRPVC) designates a partially plasticized thermoplastic compound whose characteristic constituent is
, G9 h9 T+ W) N) cpolyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate.: {! R( i/ A1 y
b Semirigid PVC is to be tested at a speed of 2.0 ±0.2 in/min or 50 ±5 mm/min.
% Q( o2 e4 T% n& \4 A7 oc The oven time and temperature are to be as follows:
; t. ^( C) S7 n8 iTemperature rating of
4 P; j0 j* k, d) G# c% iinsulation or jacket% Q( |# T) V! P# L* U l6 N+ T
Specified oven time and temperature
' o# @8 W+ D+ W3 X# ]h °C (°F)
; v O% d9 o$ z105°C (221°F) 168 136.0 ±1.0°C
+ q9 r! F; [6 G(276.8±1.8°F)
( L' x k$ x# V$ I; e: ^ q7 i90°C (194°F) 168 121.0 ±1.0°C' S. B; c% u4 | r2 c$ y
(249.8 ±1.8°F)
* ]5 M# b& R) g$ n) f75°C (167°F) 168 113.0 ±1.0°C
# H8 [2 a. \' R8 A$ Y, y: N% v(235.4 ±1.8°F)
$ ]2 T# }, Y2 Q' w U, T9 l60°C (140°F) 168 100.0 ±1.0°C
: u. ~! H$ }5 L' W(212.0 ±1.8°F)
% M* @: k7 A6 s* R% h4 d# F- D9 Qd As an alternative to testing for retention of tensile strength and elongation, it is appropriate to wind aged specimens of the
2 n; ^5 E9 h1 F) R7 @" \60°C (140°F) insulation in place on the conductor onto a mandrel as described under ²Flexibility² in the applicable wire. S9 l; g5 H2 ~# ?
Standard. Unaged specimens are to be tested for tensile strength and elongation. Where aged specimens that are tested for- F2 @, k% n- g% b1 P
retention of tensile strength and elongation show results that do not comply, it is appropriate to use the flexibility procedure% I/ ^5 h: h6 h3 R+ C- U1 g
described under ²Flexibility² as a referee test. |
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