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testing | LSHF materials


Right: Part of UL’s HF materials testing


installation


Low-Smoke, Thermoplastic-Insulated and Sheathed Cables of Rated Voltages Up to and Including 450/750 V.” This series is one of the first to provide component material hydrogen free (HF), complete cable smoke requirements and applicable LSHF cable surface marking.


Certification programmes As a result of the publication of this standard, UL has launched two new certification programmes: a material recognition service; and optional cable surface mark programme. The material recognition service uses test methods


from IEC 60754-1/-2 and IEC 62821-1/-2 as described under Subject Outline UL 2885, “Outline of Investigation for Acid Gas, Acidity and Conductivity of Combusted Material and Assessment of Halogens,” dated 2015-02- 12. This service is geared to support suppliers of insulation and jacket compounds, and of cable compo- nents such as fillers, tapes, wraps, and the like. It can be summarised as follows: IEC 60754-1. Under the UL 2885 standard, combusti-


ble materials are evaluated for the amount of hydrogen chlorine (HCl) and then classified to a Performance Level Category (PLC). The PLC chart as shown in Table 8.1 of UL 2885 was developed by UL and is not found in IEC 60754-1. Combustible materials (insulation, jacket, fillers, tapes, etc) evaluated under this service/ standard(s) would not make claims or assertions to the halogen content of the material(s) and are not appropri- ate for use in validating cable products or their material components as non-halogen, zero halogen, halogen- free, low halogen or LSZH. IEC 60754-2. Combustible materials for this standard under UL 2885 are evaluated for pH and conductivity. Combustible materials (insulation, jacket, fillers, tapes, etc) evaluated under this service/standard(s) would not make claims or assertions to the halogen content of the material(s) and are not appropriate for use in validating cable products or their material components as non-halo- gen, zero halogen, halogen-free, low halogen or LSZH. IEC 62821-1/-2. Under the UL 2885 standard,


About the author: Robert Bellassai is a Senior Staff Engineer working out of the UL facility at Melville, New York, US. Tel: +1 631-546-2871; Email: Robert.W.Bellassai@ul.com UL is a global independent safety science


company employing close to 11,000 worldwide. To learn more about its certification, testing, inspection, training and education services, visit www.UL.com


38 COMPOUNDING WORLD | December 2016


combustible materials are evaluated for halogen content. Materials evaluated under this standard will allow for the “HF” material recognition designation for any combustible compound/component in a finished cable. Suppliers of insulation and jacket compounds and cable components may choose to obtain a material recognition for any one or more of the above standards.


Marking designation For wire and cable manufacturers, UL established an “-HF” and “-LSHF” cable surface mark designation in accordance to IEC 62821-3 (for example, Type CMR- LSHF or OFNR-LSHF, TC-LSHF, RHHW-HF, CM-HF, SJO-HF, etc). This was detailed in the Announcement Bulletin, “Halogen Free (HF) and Low Smoke Halogen Free (LSHF) Service Offering for Wire and Cable,” (published on 20 February 2015). Under the “-HF” and “-LSHF” cable programme, all


combustible materials (insulation, jacket, fillers, tapes, wraps, shields, etc) must first be recognised under UL’s material Recognition Programme as per UL 2885 (described above) or tested individually by the cable manufacturer. The cable manufacturer would be authorised to use these HF Recognised materials in order to apply the “-HF” and “-LSHF” optional cable surface mark.


Under the optional cable surface mark programme,


no reference is permitted within the UL print legend surface print, regarding non-halogen, non-halogenated, zero halogen, low halogen or LSZH or reference material provided by the cable manufacturer as these designa- tions are not covered in the IEC 62821-3 standard. Currently, UL has certified seven wire and cable


companies to mark certain cable constructions as “HF” & “LSHF” and 10 suppliers of HF compound material to the wire and cable industry.


www.compoundingworld.com


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