Ellis Patents Alpha Aluminium Trefoil Cable Cleats (23.2-74.6mm)

Ellis Patents Alpha Aluminium Trefoil Cable Cleats (23.2-74.6mm)

Cable Cleats

Alpha Cable Cleats

Trefoil Cleats

  • Maximum Short Circuit Test Level 96kA
  • Cable Cleat Spacing – 600mm
  • Cable Cleat Type – Trefoil Cables
  • Material – Aluminium
  • Cleat Range Trefoil Cables – 23.2-74.6mm

Thorne & Derrick International, based in the UK, stock and distribute the complete range of cable cleats and cable hangers manufactured by Ellis Patents including the Alpha range for short circuit retention and cable protection of LV (Low Voltage), MV (Medium Voltage) and HV (High Voltage) power cable systems in single-way or trefoil installation.

Ellis Patents Alpha Cable Cleats are aluminium or LSF Zero Halogen trefoil cable cleats for cable diameters ranging from 23.2-74.6mm for cable applications where the moderate to low levels of short circuit withstand are required.

Alpha cable cleats are designed for rapid installation and are manufactured from extruded aluminium making it lighter and tougher than cast products.

The trefoil cable cleats are supplied with zinc plated closing fasteners. The polymeric LSF zero halogen base option can be used to prevent galvanic corrosion.

International Standard IEC 61914:2009

Ellis Patent cable cleats with international specifications are used to clamp and retain LV MV HV cables including 11kV and 33kV networks depending on short-circuit calculations according to IEC61914 calculations.


Maximum Short Circuit Test Level Cleat Spacing

  • 96kA 600mm


Installation instructions for trefoil cables using Alpha cleats manufactured by Ellis Patents:

Remove the setscrewInstall CablesReplace the setscrew

 Remove the setscrew, sprung washer and nut. Fix the cleat to the support structure with a securing bolt, washer and nut (supplied upon request). NOTE: The cleat may have the optional LSF (plastic base). Installation instructions are common.
2. Install the cables.

NOTE: Trefoil installation pictured – single cable installation similar.

3. Replace the setscrew, sprung washer and nut and tighten.

Do not over-tighten. The cable cleat should secure the cable but does not need to be so tight that the cable bulges at either side of the trefoil cleat.

Ellis Patents Alpha Cable Cleats Testing Information

Should you require test samples or further specification details about Alpha cable cleats please contact us:

PropertiesIEC 61914:2009 Classification ClauseUnits / ClassificationAlpha Trefoil Cable Application Test Data
Cleat Type6.1, or Composite
Impact Resistance6.3, 6.3.5, 9.2Very Heavy Classification (5kg at 400mm)Pass
Resistance To Electromechanical Force6.4, 6.4.3, 9.5kA at 600mm Centres (withstanding one short circuit)96 (Peak) (Report No. PDL-
6.4, 6.4.4, 9.5ka at 600mm Centres (withstandin more than one short circuit)72.4 (Peak) (Report No. PDL-07.161.1)
Temperature for Permanent Application6.2ºC-40 to +90 (+60 for polymeric base version)
Needle Flame Test10.0, 10.1Application Time (seconds)> 120
Lateral Load Test9.3Newtons (N)Refer to Ellis Patents for further details
Axial Movement Test9.4Newtons (N)440
Ellis Patents Alpha Aluminium Trefoil Cable Cleats (23.2-74.6mm)

Ellis Patents Alpha Aluminium Trefoil Cable Cleats (23.2-74.6mm)


➡The following selection table provides information to enable the specification or purchase of the correct Alpha cable cleat manufactured by Ellis Patents – contact Thorne & Derrick for further technical information, installation advice, samples or to place an order.

Trefoil Cable Cleat Part Number – Aluminium BaseTrefoil Cable Cleat Part Number – LSF Zero Halogen BaseMin Dia (mm)Max Dia (mm)W (mm)H (mm)D (mm)Cleat Fixing HolesWeight (g)
ALP-01-AN0ALP-01-AN123.225.1769348.51 x M10168
ALP-02-AN0ALP-02-AN125.127.1799648.51 x M10178
ALP-03-AN0ALP-03-AN127.129.38210148.51 x M10185
ALP-04-AN0ALP-04-AN129.331.78610548.51 x M10195
ALP-05-AN0ALP-05-AN131.734.29111048.51 x M10205
ALP-06-AN0ALP-06-AN134.237.09611648.51 x M10217
ALP-07-AN0ALP-07-AN137.040.010112148.51 x M10229
ALP-08-AN0ALP-08-AN140.043.210612748.51 x M10241
ALP-09-AN0ALP-09-AN143.246.711313448.51 x M10255
ALP-10-AN0ALP-10-AN146.750.211914148.51 x M10272
ALP-11-AN0ALP-11-AN150.554.612714848.51 x M10288
ALP-12-AN0ALP-12-AN154.659.013515648.51 x M10307
ALP-13-AN0ALP-13-AN059.063.814416548.51 x M10327
ALP-14-AN0ALP-14-AN163.869.015317548.51 x M10348
ALP-15-AN0ALP-15-AN169.074.616318648.51 x M10372


Ellis Patents Alpha Aluminium Trefoil Cable Cleats (23.2-74.6mm)

Ellis Patents Alpha Aluminium Trefoil Cable Cleats – Dimensions

Project Application: Trefoil Cable Cleats (Transmission Substations). The world’s leading cable cleat manufacturer, Ellis have secured a specification and installation by Edelnor (Peru – Lima) for their range of Alpha trefoil cable cleats to retain and clamps cables in trackside and tunnel locals on the city’s metropolitan railway system. Ellis Alpha cable cleats manufactured from extruded aluminium (6000 series) to BS EN 755 are more robust and durable than cast aluminium cable cleats – one bolt fixing for simple and fast installation with 2 base options (aluminium or polymer), the latter for use in LV MV HV cable installations where galvanic corrosion could be a concern.

Ellis Patents Cable Cleats

Ellis Cleats | Emperor | Vulcan | Atlas | Phoenix | Single Trefoil Quad Bundled Cables

Cable Cleats v Cable Ties

The Video produced by Ellis Patents provides compelling evidence of the need to ensure all cables are adequately supported and retained to cable containment to protect against the devastating effects of short circuit faults: 118kA Short Circuit Fault Current | 0.1 Seconds Duration | 480V Low Voltage Cables. 

Data Sheets