Brochure

165
© 2011 – SOURIAU
There are two main standards for industrial connectors: UL94 & UL1977
UL94
This standard is dedicated to plastics fl ammability. It characterises how the material burns in various orientation and thicknesses.
The UTS series has been rated at V-0 & HB.
Procedure: A specimen is supported in a vertical or horizontal position and a fl ame is applied to the bottom of the specimen. The fl ame is
applied for ten seconds and then removed until fl aming stops, at which time the fl ame is reapplied for another ten seconds and then removed.
Two sets of fi ve specimens are tested. The two sets are conditioned under different conditions.
V-0 Vertical burning:
• Specimens must not burn with fl aming combustion for more
than 10 seconds after either test fl ame application.
• Total fl aming combustion time must not exceed 50 seconds
for each set of 5 specimens.
• Specimens must not burn with fl aming or glowing combustion
up to the specimen holding clamp.
• Specimens must not drip fl aming particles that ignite the
cotton.
• No specimen can have glowing combustion remain for longer
than 30 seconds after removal of the test fl ame.
~
~
5’’
12’’
45°
Cotton
Cotton
Material
Material
Underwriter Laboratories
HB Horizontal burning:
• A material classed 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 classed 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 classed HB shall cease to burn before the 100 mm
reference mark.
45°
45°
Material
Material
10 0
±1
mm
25
±1
mm
10
±1
mm
Wire gauze
Wire gauze
UTS Series
Technical information
Technical information