UL 94 5th Edition from 1996, “Standard for Flammability of Plastic Materials for Parts in Devices and Appliances,” has just been modified by a newly released Change Notice (1/18/2013) and it’s available from Document Center Inc. now. The notice is cumulative, including changes from all previous notices.
There are two new modifications in this notice. First, it denotes the ANSI adoption of the standard in January 2013. Secondly, it now contains specific reference to ASTM E162-08, “Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source.” Please note: This is the obsolete 2008 edition of the ASTM standard.
There are two types of pre-selection test programs conducted on plastic materials to measure flammability characteristics. The first is covered by UL 94 and determines the material’s tendency either to extinguish or to spread the flame once the specimen has been ignited. FYI: The UL 94 is now harmonized with IEC 60707 (obsolete), IEC 60695-11-10, IEC 60695-11-20, ISO 9772 and ISO 9773.
The second test program measures the ignition resistance of the plastic to electrical ignition sources. The material’s resistance to ignition and surface tracking characteristics is described in UL 746A (similar to the test procedures described in IEC 60112, the IEC 60695 series and IEC 60950-1).
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