Ellis Patents & Prysmian Cable Cleats - Nylon & LSF

Ellis Patents Cable CleatsLow Smoke & Fume, Zero Halogen (LSF) Cable Cleats from Ellis Patents

BICC Pirelli Prysmian Telcleats, The Range Taking Cable Cleat

Ellis Patents - Cable Cleats


Ellis Patents lead the market with their range of single and two bolt hole fixing plastic nylon cable cleats including standard polypropylene or LSF (low smoke zero halogen) flame retardant cable cleats.

Ellis Patents plastic nylon cable cleats fix, retain and support cables providing optimum cable containment in short circuit situations.

LSF (Low Smoke & Fume - Zero Halogen) Ellis Patents Cable Cleats

1) LSF (Low Smoke Fume) Cable Cleats, Nylon - rigid plastic cable cleats with VL94 accreditation to VL0 and limited oxygen index of 31%.

2) LSF (Low Smoke Fume) Cable Cleats, Polymeric - flexible plastic, fire resistant cable cleats with limited oxygen index of 33%.

Prysmian BICON fire resistant, galvanised Iron Claw Cleats are recommended for cleating fire performance cables (FP400 FP600) to wall, cable ladder or cable tray - fire resistant cable cleats can withstand a 2 hour excursion to 1000 degrees Celsius and suit FP fire performance cables up to 54mm diameter.

Pictured : Ellis Patents Cable Cleats Overview

Ellis Patents Cable Cleats


NOTE - Cable Cleats, Specification Alert
Leading cable cleat manufacturer, Ellis Patents has issued a stark warning that incorrect interpretation of short-circuit test reports is leading to inappropriate cable cleats being inadvertently specified and installed – a situation that is putting vital electrical cable installations and lives at unnecessary risk.

The issue, according to Ellis Patents director, Richard Shaw is that the headline figure reported on third party cable cleat test reports is frequently, and mistakenly, taken to mean that the cleat tested deliver the same level of short-circuit withstand irrespective of the installation.

“You cannot say that a specific cable cleat has a short-circuit withstand of 150kA without qualifying the statement,” said Richard. “For example, you’d need to say that the cleat has a short-circuit withstand of 150kA when securing 43mm cable in trefoil at 300mm centres.”

Shaw highlights a recent report that showed a cable cleats withstanding a peak short-circuit of 138kA, but that on full reading it became clear that the test rig was set up with four trefoil circuits in parallel and that, under these circumstances, whilst the overall fault level was 138kA, each of the four trefoil groups only saw a quarter of the fault, equivalent to 34.5kA.

“It’s easy to see how this report could have been misinterpreted and the product taken to be much stronger than it really was,” he said.

“This example is just one of many, but it clearly highlights the need for third party test reports to be carefully analysed. Of course the onus is on the specifier or contractor to do this, but as a leading cable cleat manufacturer we are more than happy to offer advice.”

In order to correctly interpret a report, Shaw suggests that those with specification responsibility should firstly ask two simple questions. Firstly, is the cable cleat tested the same as the product being offered? And secondly, is the test installation similar to the project installation? For example, a test of three single conductor cables in parallel secured with single cable cleats cannot be compared with a trefoil installation secured with trefoil cleats.

He goes on to say that there is only one safe way to interpret a report and that is by calculating the forces experienced by the cleat during the test and comparing it with the anticipated force the nominated cleat would see in the proposed installation.”

“The moral of the story is clear – don’t judge a short circuit test report by its cover,” he adds. “Instead, make absolutely certain that the cable cleat you’re specifying is suitable for the specific installation and if that means asking for project specific testing then so be it.”

Ellis Patents prides itself on the extensive third party testing it puts all of its cable cleat products through prior to taking them to market and the fact that they will always agree to project specific testing to secure an order.

Blog : IEC Standard 61914 : Cable Cleats & Short-Circuit Calculations

Video YouTube Playlist : Ellis Patents Cable Cleats, Clamps & Hooks :

Video : Ellis Patents Cable Cleats v Cable Ties - Short Circuit Test Comparison

Video : LSF (Low Smoke Fume) vs LSHF (Low Smoke Halogen Free - Zero Halogen). Flame Test. LSF vs LSHF - Cables & Accessories. There is a difference.  To clear up the confusion that still remains over the difference between LSF (Low Smoke and Fume) and LSHF (Low Smoke Halogen Free) cables, FS Cables recorded a very simple cigarette lighter test to show the difference. Using a the same piece of unscreened data cable in both LSF and LSHF version, a simple cigarette lighter flame was applied to both cables. The results are startling. As you can see the LSF cable very quickly begins to burn and give off black smoke. By contrast, see how the LSHF cable burns cleanly when exposed to the same heat source. The sheath swells and will eventually burn through in the same way as LSF but it is only producing a tiny amount of white smoke and almost no flame. As a rule of thumb, if the application calls for a data, signal or control cable in LSF, question it. If its a public access building such as an airport, hospital, prison, or hotel, where evacuation in the event of a fire may be restricted you will almost certainly need LSHF cable.


Ellis Patents Cable Cleats - 2013 Catalogue


Ellis Patents Cable Cleats - One & Two Hole Cleats - Updated Design


Ellis Patents Cable Cleats - Complete Catalogue


Prysmian Cable Cleats - Complete Catalogue


The Dangers of Incorrectly Cleated Cables - Ellis Patents


The Importance of Correctly Cleated Cables - Ellis Patents


IEC 61914 (2009) No Cheating on Cleating - Ellis Patents


Cable Cleats for LV-HV Cables in Building Services - Ellis Patents