Datasheet

157
Therearetwomainstandardsforindustrialconnectors:UL94&UL1977
UL94
This standard is dedicated to plastics ammability. It characterises how the material burns in various orientation and thicknesses.
The UTO series has been rated at V-0 & HB.
Procedure: A specimen is supported in a vertical or horizontal position and a ame is applied to the bottom of the specimen. The ame is applied
for ten seconds and then removed until aming stops, at which time the ame is reapplied for another ten seconds and then removed. Two sets
of ve specimens are tested.
V-0Verticalburning:
• Specimens must not burn with aming combustion for more
than 10 seconds after each test ame application
• Total aming combustion time must not exceed 50 seconds
for each set of 5 specimens
• Specimens must not burn with aming or glowing combustion
up to the specimen holding clamp
• Specimens must not drip aming particles that ignite
the cotton
• No specimen can have glowing combustion remain for longer
than 30 seconds after removal of the test ame.
Underwriter Laboratories
HBHorizontalburning:
• A material classied HB shall not have a burning rate
exceeding 40 mm per minute over a 75 mm span for
specimens having a thickness of 3.0 to 13 mm
• A material classied HB shall not have a burning rate
exceeding 75 mm per minute over a 75 mm span for
specimens having a thickness less than 3.0 mm
• A material classied HB shall cease to burn before the
100 mm reference mark.
45°
45°
Material
100
±1
mm
25
±1
mm
10
±1
mm
Wire gauze
Wire gauze
UL94 + UL1977
~
~
125
±1
mm
300
±1
mm
45°
Cotton
Material
13
±0.5
mm
13
±0.5
mm
UTO Series
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Technical Information
Technical Information