The following article has been authored with the intent to highlight a serious specification shortcoming with respect to the understanding of conformance to the current IEC standard and the short-circuit testing and purchasing of cable cleats.
Working with Ellis Patents, Thorne & Derrick have successfully addressed this issue across several recent UK projects in the offshore wind, battery storage, utility substation and data centre sectors – needless to say, power is everywhere, and we hope this article will lead to a more widespread correction and update at specifier and contractor levels throughout the electrical industry.
Thorne & Derrick are a leading Specialist Distributor of LV HV Jointing, Earthing, Substation & Electrical Eqpt; this includes Cable Management, Fastening & Support Systems such as cable ties, cable hangers and strapping systems for LV up to 132kV power cable networks located onshore and offshore in industrial, hazardous and high voltage applications.
To nutshell this for us, you should ensure your cable cleats are tested to IEC61914:2015 – IEC61914:2009 is Revised, Superseded and Withdrawn. Here is why.
IEC 61914:2009 Is Withdrawn
IEC 61914:2015 is available as IEC 61914:2015 RLV which contains the International Standard and its Redline Version, showing all changes of the technical content compared to the previous edition.
IEC 61914:2015 specifies requirements and tests for cable cleats and intermediate restraints used for securing cable in electrical installations. Cable cleats provide resistance to electromechanical forces where declared. This standard includes cable cleats that rely on a mounting surface specified by the manufacturer for axial and/or lateral retention of cables.
This 2nd Edition of IEC61914 cancels and replaces the first edition published in 2009. This edition constitutes a technical revision.
a) Additional declaration and test for lateral load retention depending on cleat mounting orientation with associated new figures;
b) Additional declaration of the distance between the cable centres in any short-circuit test and associated new figures;
c) Specification of the cable to be used in short-circuit testing and relaxation of the ambient temperature limits for the test;#
All cable cleats stocked and supplied by Thorne & Derrick are short-circuit tested to the current updated version IEC61914:2015.
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By Thorne & Derrick International