Trefoil Intermediate Restraint

Standard Duty Stainless Steel Intermediate Restraint



The SDSSIR intermediate restraint range are metallic restraints which have been designed, constructed, and tested in accordance with the International Standard ‘Cable Cleats for Electrical Installations’ IEC 61914 to ensure the securing and retention of cables, without sustaining damage to the cable(s).

The restraint has been designed and tested for short circuit conditions, within harsh environments. The SDSSIR are available for trefoil application/formation and are fabricated from 316L stainless steel giving it high creep strength whilst providing excellent corrosion resistance
in the harshest of environments.

The restraint comes with liners as standard, helping to restrain the cable(s) within vertical applications, providing a layer of protection between the cable sheath and the cable cleat during normal operation, where thermal elongation of cables occur, protecting the cable from chafing on any mounting surface due to differential movements such as those found in marine and offshore applications. The liners also assist in the extra protection of cable(s) in the event of short circuit fault conditions. The standard liners supplied are classified as Low Smoke
& Fume (LSF), Zero Halogen (LS0H) and Phosphorus Free.


  • Third party certification to IEC 61914
  • 316L stainless steel
  • Operating temperature -60°C to +60°C
  • Liners are classified as Low Smoke & Fume (LSF), Zero Halogen (LS0H) and Phosphorus Free

Technical Data

Type 6.1.3 Composite SDSSIR –
Standard Duty Stainless Steel
Intermediate Restraint
Design Specification IEC 61914
Temperature for permanent application Standard Liner -60 to +60°C
IEC 61914 clause / part 6.2
Needle Flame Test Pass – 120 second flame application time
IEC 61914, IEC 60695-11-5
Lateral Load Test Refer to CMP Products
Axial Load Test Refer to CMP Products
Impact Resistance Pass – Very heavy IEC 61914
Material 316L Stainless Steel
Low Smoke & Fume (LSF) Liners
UL Certificate E524310
UL Compliance Standards UL 1565, CSA C22.2 No. 18.5-13

Coatings are available upon request by adding the following suffixes to the ordering reference – EC for epoxy coating, PC for polyester coating and TC for thermoplastic coating. Example order reference for epoxy coating suffix EC (SDSSIR066070EC)