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[国外标准] UL 2556-2007 Wire and Cable Test Methods
P:2009-11-19 14:29:20
2
UNDERWRITERS LABORATORIES, INC. FACTORY INSPECTION PROCEDURE
Subj. 758 Section 2 Page 2556 Issued December 27, 1971
Vol. This Page Effective Revised
Style 2556 Multi-Conductor Irradiated (Extruded, or Laminated)
Flame-Retardant Polyethylene Insulated Flat Cable
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Rating
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Conductors 27 through 60, No. 33 Awg, silver coated solid copper.
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Insulation Irradiated (extruded, or laminated) flame-retardant
polyethylene in min. 7 mil wall. Conductors within
row separated min. 3 mils. The adjacent ground
conductors within a row may touch. Total over-all
thickness of cable min. 25 mils.
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Standard Flexible Cord and Fixture Wire (Subj. No. 62).
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Instructions Detailed examination.
to Dielectric Strength 900 V for 1 min. (1) between
Inspector adjacent conductors, (2) between conductors and
two metal plates.
Insulation shall not crack when cable is flexed
flatwise into a U-bend around a 1/
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Northbrook (4) Detailed examination.
Counter-Check (4) Cold bend. Insulation shall not crack when
Program cable is flexed into a U-bend around a 1/2
in. diam. mandrel and taped into place. The
cable shall be allowed to cool to minus
for one hour.
(4) Age 168 hours at
strength test described above.
(2) Flame test, Page 31. One length of cable to be
supported flat with flame applied in center of
width, and another length of cable held on edge
with flame applied on lower edge.
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Use For use in protected locations in data
processing equipment and office appliances.