Information

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ELECTRICAL SOLUTIONS
C3.19
B2.
Cable
Accessories
C1.
Wiring
Duct
C3.
Abrasion
Protection
C4.
Cable
Management
D1.
Terminals
D2.
Power
Connectors
E1.
Labeling
Systems
E2.
Labels
E3.
Pre-Printed
& Write-On
Markers
F.
Index
B3.
Stainless
Steel Ties
C2.
Surface
Raceway
E5.
Lockout/
Tagout
& Safety
Solutions
B1.
Cable Ties
A.
System
Overview
D3.
Grounding
Connectors
E4.
Permanent
Identification
Flammability Tests and Classification
• A number of test procedures have been developed which can be
used for the evaluation and comparison of various materials
to support combustion
• Review the following classifications to find which category is designed
to suit your abrasion and protection applications
Test samples of material, with dimension 125 ± 5mm by 13.0 ± 5mm and provided in the minimum and maximum thickness
of the intended end use product, are tested in an unconditioned (as manufactured) state and in a conditioned state
(7 days at 168F°, 75°C). The test requires the placement of a precisely controlled flame under a vertically supported
specimen for a 10 second period. The flame is removed and the duration of flaming is recorded. If the flame extinguishes, the
specimen is immediately subjected to a second 10 second ignition period. Duration of flaming is again recorded. A piece of
100% cotton is placed under the specimen. Also observed and documented is if the sample drips flaming particles that ignite
the cotton indicator below.
MATERIALS CLASSIFIED UL 94 HB
• Specimens shall have a maximum burn rate of <1.5 in./min over 3 inches of thickness of .120 inches to .5 inches
• Specimens shall have a maximum burn rate of <30 in./min over 3 inches for a thickness less than .120 inches
UL 224 VERTICAL WIRE FLAME TEST
Samples of fully recovered tubing are placed over a length of fine spring steel music wire. The test requires the precise placement of a
controlled flame that contacts the heat shrink tubing. The flame is applied in five 15 second intervals with a time period between
applications. If the flame extinguishes immediately after the first flame removal, subsequent flame applications are made to the tubing.
Duration of specimen flaming is noted. A piece of surgical cotton is placed under the specimen. If a flaming or glowing piece of tubing drips
and ignites the cotton, this is also noted.
MATERIALS CLASSIFIED AS VW-1 SHALL:
• Not flame or glow longer than 60 seconds following any of the five applications of the flame
• Not ignite or damage more than 25% of kraft paper flag that is placed around the top of the tubing
• Not have any specimens which drip flaming particles and ignite the surgical cotton located 9 1/2 inches below the test specimen
Abrasion Protection Products Flammability Tests and Classifications
Criteria Conditions V-0 V-1 V-2
Afterflame time for each individual specimen t
1
or t
2
_<10s _<30s _<30s
Total Afterflame time for any condition set (t
1
plus t
2
for the 5 specimens) _<50s _<250s _<250s
Afterflame plus afterglow time for each individual specimen
after the second flame application (t
2
+ t
3
)
_<30s _<60s _<60s
Afterflame or afterglow of any specimen up to the holding clamp No No No
Cotton indicator ignited by flaming particles or drops No No Yes
Materials Classification
UL 94 Vertical Burning Test
t
1
Afterflame time after first flame application
t
2
Afterflame time after second flame application
t
3
Afterglow time after second flame application